./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-memory-alloca/openbsd_cstrncpy-alloca-1.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-memory-alloca/openbsd_cstrncpy-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash a15d7a8babeb47c5803852aa414fd44c9c2ce5952463596f56bd26c728f7d82b --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 01:40:06,484 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:40:06,487 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:40:06,515 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:40:06,520 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:40:06,524 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:40:06,527 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:40:06,531 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:40:06,534 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:40:06,540 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:40:06,542 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:40:06,544 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:40:06,545 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:40:06,548 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:40:06,552 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:40:06,554 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:40:06,557 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:40:06,559 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:40:06,560 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:40:06,566 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:40:06,569 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:40:06,571 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:40:06,573 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:40:06,575 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:40:06,586 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:40:06,589 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:40:06,590 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:40:06,591 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:40:06,593 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:40:06,594 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:40:06,596 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:40:06,597 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:40:06,600 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:40:06,602 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:40:06,604 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:40:06,604 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:40:06,605 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:40:06,606 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:40:06,606 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:40:06,607 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:40:06,608 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:40:06,610 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2022-11-22 01:40:06,664 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:40:06,667 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:40:06,668 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:40:06,668 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:40:06,670 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:40:06,670 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:40:06,670 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:40:06,670 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:40:06,671 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:40:06,671 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:40:06,672 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:40:06,673 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:40:06,673 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:40:06,673 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:40:06,673 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:40:06,674 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:40:06,674 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:40:06,674 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:40:06,675 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-22 01:40:06,675 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-22 01:40:06,676 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:40:06,676 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 01:40:06,676 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:40:06,677 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:40:06,677 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-22 01:40:06,678 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-22 01:40:06,678 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-22 01:40:06,678 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:40:06,678 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-22 01:40:06,679 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:40:06,679 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:40:06,680 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:40:06,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:40:06,680 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:40:06,680 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:40:06,681 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:40:06,681 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:40:06,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:40:06,681 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:40:06,682 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_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a15d7a8babeb47c5803852aa414fd44c9c2ce5952463596f56bd26c728f7d82b [2022-11-22 01:40:06,990 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:40:07,016 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:40:07,019 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:40:07,020 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:40:07,021 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:40:07,023 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/termination-memory-alloca/openbsd_cstrncpy-alloca-1.i [2022-11-22 01:40:10,305 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:40:10,611 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:40:10,612 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/sv-benchmarks/c/termination-memory-alloca/openbsd_cstrncpy-alloca-1.i [2022-11-22 01:40:10,624 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/data/914906fa6/f04e5de750234782b034a574d4343998/FLAG7486e84a5 [2022-11-22 01:40:10,642 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/data/914906fa6/f04e5de750234782b034a574d4343998 [2022-11-22 01:40:10,647 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:40:10,651 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:40:10,652 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:40:10,653 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:40:10,660 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:40:10,661 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:40:10" (1/1) ... [2022-11-22 01:40:10,662 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b72cf06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:40:10, skipping insertion in model container [2022-11-22 01:40:10,663 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:40:10" (1/1) ... [2022-11-22 01:40:10,671 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:40:10,732 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:40:11,077 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:40:11,088 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:40:11,122 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:40:11,146 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:40:11,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:40:11 WrapperNode [2022-11-22 01:40:11,146 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:40:11,148 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:40:11,148 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:40:11,148 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:40:11,156 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:40:11" (1/1) ... [2022-11-22 01:40:11,169 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:40:11" (1/1) ... [2022-11-22 01:40:11,191 INFO L138 Inliner]: procedures = 111, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 74 [2022-11-22 01:40:11,192 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:40:11,192 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:40:11,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:40:11,193 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:40:11,202 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:40:11" (1/1) ... [2022-11-22 01:40:11,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:40:11" (1/1) ... [2022-11-22 01:40:11,205 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:40:11" (1/1) ... [2022-11-22 01:40:11,206 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:40:11" (1/1) ... [2022-11-22 01:40:11,211 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:40:11" (1/1) ... [2022-11-22 01:40:11,215 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:40:11" (1/1) ... [2022-11-22 01:40:11,216 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:40:11" (1/1) ... [2022-11-22 01:40:11,217 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:40:11" (1/1) ... [2022-11-22 01:40:11,220 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:40:11,221 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:40:11,221 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:40:11,221 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:40:11,222 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:40:11" (1/1) ... [2022-11-22 01:40:11,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:40:11,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:40:11,263 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:40:11,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:40:11,319 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 01:40:11,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 01:40:11,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 01:40:11,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 01:40:11,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:40:11,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:40:11,431 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:40:11,433 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:40:11,664 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:40:11,739 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:40:11,740 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-22 01:40:11,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:40:11 BoogieIcfgContainer [2022-11-22 01:40:11,743 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:40:11,746 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:40:11,746 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:40:11,750 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:40:11,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:40:10" (1/3) ... [2022-11-22 01:40:11,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@112d1156 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:40:11, skipping insertion in model container [2022-11-22 01:40:11,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:40:11" (2/3) ... [2022-11-22 01:40:11,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@112d1156 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:40:11, skipping insertion in model container [2022-11-22 01:40:11,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:40:11" (3/3) ... [2022-11-22 01:40:11,754 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrncpy-alloca-1.i [2022-11-22 01:40:11,778 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:40:11,794 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2022-11-22 01:40:11,871 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:40:11,879 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;@4a51ca64, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:40:11,879 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-11-22 01:40:11,884 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 22 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) [2022-11-22 01:40:11,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 01:40:11,892 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:40:11,892 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 01:40:11,893 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 01:40:11,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:40:11,900 INFO L85 PathProgramCache]: Analyzing trace with hash 3613, now seen corresponding path program 1 times [2022-11-22 01:40:11,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:40:11,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702734925] [2022-11-22 01:40:11,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:40:11,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:40:12,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:40:12,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:40:12,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:40:12,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702734925] [2022-11-22 01:40:12,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702734925] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:40:12,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:40:12,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:40:12,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947780201] [2022-11-22 01:40:12,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:40:12,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:40:12,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:40:12,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:40:12,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:40:12,396 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 22 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) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:40:12,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:40:12,439 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2022-11-22 01:40:12,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:40:12,442 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2022-11-22 01:40:12,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:40:12,449 INFO L225 Difference]: With dead ends: 22 [2022-11-22 01:40:12,449 INFO L226 Difference]: Without dead ends: 21 [2022-11-22 01:40:12,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:40:12,455 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:40:12,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 13 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:40:12,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-22 01:40:12,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-22 01:40:12,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:40:12,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-11-22 01:40:12,495 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 2 [2022-11-22 01:40:12,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:40:12,495 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-11-22 01:40:12,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:40:12,497 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-11-22 01:40:12,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 01:40:12,498 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:40:12,498 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 01:40:12,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 01:40:12,500 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 01:40:12,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:40:12,501 INFO L85 PathProgramCache]: Analyzing trace with hash 3614, now seen corresponding path program 1 times [2022-11-22 01:40:12,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:40:12,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250771790] [2022-11-22 01:40:12,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:40:12,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:40:12,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:40:12,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:40:12,722 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:40:12,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250771790] [2022-11-22 01:40:12,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250771790] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:40:12,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:40:12,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:40:12,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467408635] [2022-11-22 01:40:12,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:40:12,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:40:12,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:40:12,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:40:12,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:40:12,726 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:40:12,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:40:12,752 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2022-11-22 01:40:12,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:40:12,753 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2022-11-22 01:40:12,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:40:12,753 INFO L225 Difference]: With dead ends: 20 [2022-11-22 01:40:12,754 INFO L226 Difference]: Without dead ends: 20 [2022-11-22 01:40:12,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:40:12,755 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 22 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:40:12,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 13 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:40:12,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-22 01:40:12,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-22 01:40:12,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.7692307692307692) 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) [2022-11-22 01:40:12,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-11-22 01:40:12,760 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 2 [2022-11-22 01:40:12,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:40:12,760 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-11-22 01:40:12,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:40:12,761 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-11-22 01:40:12,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 01:40:12,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:40:12,762 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-22 01:40:12,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 01:40:12,762 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 01:40:12,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:40:12,763 INFO L85 PathProgramCache]: Analyzing trace with hash 109458375, now seen corresponding path program 1 times [2022-11-22 01:40:12,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:40:12,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402680257] [2022-11-22 01:40:12,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:40:12,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:40:12,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:40:13,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:40:13,028 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:40:13,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402680257] [2022-11-22 01:40:13,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402680257] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:40:13,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:40:13,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:40:13,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754659324] [2022-11-22 01:40:13,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:40:13,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:40:13,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:40:13,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:40:13,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:40:13,035 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 4 states, 4 states have (on average 1.25) 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) [2022-11-22 01:40:13,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:40:13,126 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2022-11-22 01:40:13,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:40:13,127 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) 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 [2022-11-22 01:40:13,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:40:13,128 INFO L225 Difference]: With dead ends: 29 [2022-11-22 01:40:13,129 INFO L226 Difference]: Without dead ends: 29 [2022-11-22 01:40:13,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:40:13,135 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 40 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:40:13,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 30 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:40:13,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-22 01:40:13,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2022-11-22 01:40:13,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:40:13,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-11-22 01:40:13,143 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 5 [2022-11-22 01:40:13,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:40:13,144 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-11-22 01:40:13,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) 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) [2022-11-22 01:40:13,144 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-11-22 01:40:13,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 01:40:13,144 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:40:13,144 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-22 01:40:13,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 01:40:13,145 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 01:40:13,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:40:13,153 INFO L85 PathProgramCache]: Analyzing trace with hash 109414528, now seen corresponding path program 1 times [2022-11-22 01:40:13,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:40:13,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057329134] [2022-11-22 01:40:13,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:40:13,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:40:13,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:40:13,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:40:13,231 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:40:13,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057329134] [2022-11-22 01:40:13,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057329134] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:40:13,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:40:13,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:40:13,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432303450] [2022-11-22 01:40:13,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:40:13,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:40:13,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:40:13,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:40:13,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:40:13,233 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 5 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) [2022-11-22 01:40:13,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:40:13,285 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2022-11-22 01:40:13,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:40:13,285 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 5 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 [2022-11-22 01:40:13,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:40:13,286 INFO L225 Difference]: With dead ends: 19 [2022-11-22 01:40:13,286 INFO L226 Difference]: Without dead ends: 19 [2022-11-22 01:40:13,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:40:13,288 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 37 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:40:13,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 15 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:40:13,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-22 01:40:13,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-22 01:40:13,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:40:13,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-11-22 01:40:13,291 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 5 [2022-11-22 01:40:13,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:40:13,292 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-11-22 01:40:13,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 5 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) [2022-11-22 01:40:13,292 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-11-22 01:40:13,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 01:40:13,292 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:40:13,293 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-22 01:40:13,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 01:40:13,293 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 01:40:13,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:40:13,294 INFO L85 PathProgramCache]: Analyzing trace with hash 109414529, now seen corresponding path program 1 times [2022-11-22 01:40:13,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:40:13,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372172885] [2022-11-22 01:40:13,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:40:13,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:40:13,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:40:13,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:40:13,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:40:13,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372172885] [2022-11-22 01:40:13,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372172885] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:40:13,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:40:13,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:40:13,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451116450] [2022-11-22 01:40:13,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:40:13,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:40:13,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:40:13,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:40:13,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:40:13,595 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 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) [2022-11-22 01:40:13,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:40:13,712 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-11-22 01:40:13,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:40:13,713 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 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 [2022-11-22 01:40:13,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:40:13,714 INFO L225 Difference]: With dead ends: 25 [2022-11-22 01:40:13,714 INFO L226 Difference]: Without dead ends: 25 [2022-11-22 01:40:13,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-22 01:40:13,715 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 57 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:40:13,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 26 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:40:13,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-22 01:40:13,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2022-11-22 01:40:13,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:40:13,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-11-22 01:40:13,720 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 5 [2022-11-22 01:40:13,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:40:13,721 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-11-22 01:40:13,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 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) [2022-11-22 01:40:13,721 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-11-22 01:40:13,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 01:40:13,722 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:40:13,722 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-22 01:40:13,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 01:40:13,723 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 01:40:13,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:40:13,723 INFO L85 PathProgramCache]: Analyzing trace with hash -903116927, now seen corresponding path program 1 times [2022-11-22 01:40:13,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:40:13,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813108040] [2022-11-22 01:40:13,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:40:13,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:40:13,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:40:14,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:40:14,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:40:14,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813108040] [2022-11-22 01:40:14,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813108040] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:40:14,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:40:14,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:40:14,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509795498] [2022-11-22 01:40:14,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:40:14,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:40:14,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:40:14,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:40:14,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:40:14,054 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:40:14,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:40:14,231 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2022-11-22 01:40:14,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:40:14,232 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-22 01:40:14,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:40:14,234 INFO L225 Difference]: With dead ends: 24 [2022-11-22 01:40:14,235 INFO L226 Difference]: Without dead ends: 24 [2022-11-22 01:40:14,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-22 01:40:14,243 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 53 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:40:14,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 22 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:40:14,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-22 01:40:14,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2022-11-22 01:40:14,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.5625) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:40:14,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-11-22 01:40:14,259 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 6 [2022-11-22 01:40:14,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:40:14,259 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-11-22 01:40:14,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:40:14,260 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-11-22 01:40:14,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 01:40:14,261 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:40:14,261 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-22 01:40:14,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 01:40:14,262 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 01:40:14,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:40:14,263 INFO L85 PathProgramCache]: Analyzing trace with hash -903116928, now seen corresponding path program 1 times [2022-11-22 01:40:14,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:40:14,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68898776] [2022-11-22 01:40:14,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:40:14,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:40:14,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:40:14,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:40:14,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:40:14,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68898776] [2022-11-22 01:40:14,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68898776] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:40:14,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:40:14,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:40:14,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066437362] [2022-11-22 01:40:14,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:40:14,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:40:14,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:40:14,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:40:14,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:40:14,479 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:40:14,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:40:14,573 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2022-11-22 01:40:14,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:40:14,574 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-22 01:40:14,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:40:14,575 INFO L225 Difference]: With dead ends: 21 [2022-11-22 01:40:14,576 INFO L226 Difference]: Without dead ends: 21 [2022-11-22 01:40:14,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-22 01:40:14,578 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 49 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:40:14,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 13 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:40:14,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-22 01:40:14,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-22 01:40:14,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:40:14,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-11-22 01:40:14,584 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 6 [2022-11-22 01:40:14,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:40:14,584 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-11-22 01:40:14,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:40:14,585 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-11-22 01:40:14,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-22 01:40:14,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:40:14,586 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:40:14,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 01:40:14,586 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 01:40:14,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:40:14,588 INFO L85 PathProgramCache]: Analyzing trace with hash 840840391, now seen corresponding path program 1 times [2022-11-22 01:40:14,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:40:14,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264977850] [2022-11-22 01:40:14,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:40:14,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:40:14,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:40:15,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:40:15,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:40:15,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264977850] [2022-11-22 01:40:15,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264977850] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:40:15,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:40:15,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 01:40:15,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251517119] [2022-11-22 01:40:15,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:40:15,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 01:40:15,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:40:15,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 01:40:15,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-22 01:40:15,158 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:40:15,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:40:15,785 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-11-22 01:40:15,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 01:40:15,785 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-22 01:40:15,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:40:15,786 INFO L225 Difference]: With dead ends: 26 [2022-11-22 01:40:15,786 INFO L226 Difference]: Without dead ends: 26 [2022-11-22 01:40:15,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-11-22 01:40:15,787 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 36 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:40:15,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 28 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:40:15,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-22 01:40:15,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-11-22 01:40:15,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.5) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:40:15,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2022-11-22 01:40:15,790 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 10 [2022-11-22 01:40:15,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:40:15,790 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2022-11-22 01:40:15,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:40:15,791 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2022-11-22 01:40:15,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-22 01:40:15,791 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:40:15,791 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:40:15,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 01:40:15,792 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 01:40:15,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:40:15,792 INFO L85 PathProgramCache]: Analyzing trace with hash 840840390, now seen corresponding path program 1 times [2022-11-22 01:40:15,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:40:15,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364181760] [2022-11-22 01:40:15,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:40:15,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:40:15,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:40:15,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:40:15,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:40:15,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364181760] [2022-11-22 01:40:15,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364181760] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:40:15,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:40:15,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:40:15,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505949091] [2022-11-22 01:40:15,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:40:15,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:40:15,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:40:15,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:40:15,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:40:15,860 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 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) [2022-11-22 01:40:15,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:40:15,912 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2022-11-22 01:40:15,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:40:15,913 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 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 [2022-11-22 01:40:15,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:40:15,913 INFO L225 Difference]: With dead ends: 24 [2022-11-22 01:40:15,914 INFO L226 Difference]: Without dead ends: 24 [2022-11-22 01:40:15,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:40:15,914 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 13 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:40:15,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:40:15,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-22 01:40:15,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-22 01:40:15,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.4) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:40:15,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-11-22 01:40:15,918 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 10 [2022-11-22 01:40:15,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:40:15,918 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-11-22 01:40:15,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 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) [2022-11-22 01:40:15,918 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-11-22 01:40:15,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-22 01:40:15,919 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:40:15,919 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:40:15,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 01:40:15,919 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 01:40:15,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:40:15,920 INFO L85 PathProgramCache]: Analyzing trace with hash 842170408, now seen corresponding path program 1 times [2022-11-22 01:40:15,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:40:15,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370978894] [2022-11-22 01:40:15,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:40:15,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:40:15,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:40:16,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:40:16,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:40:16,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370978894] [2022-11-22 01:40:16,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370978894] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:40:16,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:40:16,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:40:16,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628618571] [2022-11-22 01:40:16,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:40:16,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:40:16,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:40:16,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:40:16,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:40:16,041 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) 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) [2022-11-22 01:40:16,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:40:16,060 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2022-11-22 01:40:16,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:40:16,061 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) 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 [2022-11-22 01:40:16,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:40:16,061 INFO L225 Difference]: With dead ends: 23 [2022-11-22 01:40:16,062 INFO L226 Difference]: Without dead ends: 21 [2022-11-22 01:40:16,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:40:16,063 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:40:16,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 22 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:40:16,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-22 01:40:16,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-22 01:40:16,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:40:16,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-11-22 01:40:16,065 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 10 [2022-11-22 01:40:16,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:40:16,066 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-11-22 01:40:16,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) 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) [2022-11-22 01:40:16,066 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-11-22 01:40:16,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-22 01:40:16,067 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:40:16,067 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:40:16,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-22 01:40:16,067 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 01:40:16,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:40:16,068 INFO L85 PathProgramCache]: Analyzing trace with hash 842170768, now seen corresponding path program 1 times [2022-11-22 01:40:16,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:40:16,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183919908] [2022-11-22 01:40:16,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:40:16,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:40:16,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:40:16,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:40:16,631 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:40:16,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183919908] [2022-11-22 01:40:16,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183919908] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:40:16,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63738196] [2022-11-22 01:40:16,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:40:16,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:40:16,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:40:16,638 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:40:16,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 01:40:16,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:40:16,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-22 01:40:16,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:40:16,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:40:17,233 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:40:17,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2022-11-22 01:40:17,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:40:17,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:40:17,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-11-22 01:40:17,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:40:17,743 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 [2022-11-22 01:40:17,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:40:17,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63738196] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:40:17,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1892902766] [2022-11-22 01:40:17,782 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 01:40:17,782 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:40:17,788 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:40:17,793 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:40:17,793 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:40:17,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:17,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-22 01:40:17,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:40:18,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:40:18,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:18,152 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-22 01:40:18,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-11-22 01:40:18,451 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-22 01:40:18,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-22 01:40:18,679 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-22 01:40:18,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-22 01:40:18,811 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:40:20,667 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '642#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-22 01:40:20,668 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:40:20,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:40:20,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2022-11-22 01:40:20,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234961459] [2022-11-22 01:40:20,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:40:20,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-22 01:40:20,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:40:20,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-22 01:40:20,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2022-11-22 01:40:20,670 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 22 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:40:21,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:40:21,311 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2022-11-22 01:40:21,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-22 01:40:21,311 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-22 01:40:21,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:40:21,313 INFO L225 Difference]: With dead ends: 27 [2022-11-22 01:40:21,313 INFO L226 Difference]: Without dead ends: 27 [2022-11-22 01:40:21,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=193, Invalid=1213, Unknown=0, NotChecked=0, Total=1406 [2022-11-22 01:40:21,315 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 44 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:40:21,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 36 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:40:21,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-22 01:40:21,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2022-11-22 01:40:21,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 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) [2022-11-22 01:40:21,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-11-22 01:40:21,318 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 10 [2022-11-22 01:40:21,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:40:21,319 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-11-22 01:40:21,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:40:21,319 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-11-22 01:40:21,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-22 01:40:21,319 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:40:21,320 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:40:21,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 01:40:21,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-22 01:40:21,527 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 01:40:21,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:40:21,527 INFO L85 PathProgramCache]: Analyzing trace with hash 337490002, now seen corresponding path program 1 times [2022-11-22 01:40:21,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:40:21,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951466894] [2022-11-22 01:40:21,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:40:21,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:40:21,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:40:22,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:40:22,150 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:40:22,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951466894] [2022-11-22 01:40:22,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951466894] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:40:22,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045308400] [2022-11-22 01:40:22,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:40:22,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:40:22,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:40:22,154 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:40:22,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 01:40:22,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:40:22,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-22 01:40:22,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:40:22,305 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:40:22,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-22 01:40:22,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:40:22,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:40:23,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:40:23,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045308400] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:40:23,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [270837752] [2022-11-22 01:40:23,743 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 01:40:23,743 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:40:23,744 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:40:23,744 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:40:23,744 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:40:23,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:23,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-22 01:40:23,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:40:23,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:40:23,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:23,991 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-22 01:40:23,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-11-22 01:40:24,173 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-22 01:40:24,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-22 01:40:24,376 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-22 01:40:24,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-22 01:40:24,492 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:40:26,595 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '807#(and (= |ULTIMATE.start_cstrncpy_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) |ULTIMATE.start_cstrncpy_#t~post4#1.offset|)) (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post3#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1) (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|)) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) 1) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-22 01:40:26,595 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:40:26,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:40:26,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 28 [2022-11-22 01:40:26,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687949680] [2022-11-22 01:40:26,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:40:26,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-22 01:40:26,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:40:26,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-22 01:40:26,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1271, Unknown=0, NotChecked=0, Total=1406 [2022-11-22 01:40:26,597 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 30 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:40:28,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:40:28,800 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-11-22 01:40:28,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 01:40:28,801 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-22 01:40:28,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:40:28,801 INFO L225 Difference]: With dead ends: 26 [2022-11-22 01:40:28,801 INFO L226 Difference]: Without dead ends: 26 [2022-11-22 01:40:28,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=278, Invalid=2074, Unknown=0, NotChecked=0, Total=2352 [2022-11-22 01:40:28,803 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 99 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:40:28,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 27 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:40:28,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-22 01:40:28,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-11-22 01:40:28,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 24 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) [2022-11-22 01:40:28,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-11-22 01:40:28,807 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 11 [2022-11-22 01:40:28,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:40:28,807 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-11-22 01:40:28,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:40:28,807 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-11-22 01:40:28,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-22 01:40:28,808 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:40:28,808 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:40:28,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-22 01:40:29,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:40:29,015 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 01:40:29,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:40:29,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1227721831, now seen corresponding path program 1 times [2022-11-22 01:40:29,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:40:29,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425417434] [2022-11-22 01:40:29,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:40:29,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:40:29,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:40:29,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:40:29,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:40:29,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425417434] [2022-11-22 01:40:29,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425417434] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:40:29,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135136902] [2022-11-22 01:40:29,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:40:29,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:40:29,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:40:29,593 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:40:29,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 01:40:29,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:40:29,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-22 01:40:29,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:40:29,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:29,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2022-11-22 01:40:29,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-22 01:40:30,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:40:30,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:40:31,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:40:31,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135136902] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:40:31,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1572239449] [2022-11-22 01:40:31,266 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-22 01:40:31,266 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:40:31,266 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:40:31,267 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:40:31,267 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:40:31,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:31,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-22 01:40:31,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:40:31,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:40:31,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:31,493 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-22 01:40:31,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-11-22 01:40:31,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:31,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:31,645 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-22 01:40:31,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 43 [2022-11-22 01:40:31,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 01:40:31,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 01:40:31,898 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:40:35,543 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '992#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrncpy_#t~post7#1.offset|) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (= |ULTIMATE.start_cstrncpy_#t~post7#1.base| |ULTIMATE.start_cstrncpy_~d~0#1.base|) (= (+ |ULTIMATE.start_cstrncpy_#t~post7#1.offset| 1) |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post7#1.base|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post7#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post7#1.offset| 1)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483646) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstrncpy_~s~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-22 01:40:35,543 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:40:35,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:40:35,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2022-11-22 01:40:35,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056982532] [2022-11-22 01:40:35,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:40:35,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-22 01:40:35,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:40:35,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-22 01:40:35,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1495, Unknown=0, NotChecked=0, Total=1722 [2022-11-22 01:40:35,545 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 32 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:40:38,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:40:38,052 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2022-11-22 01:40:38,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-22 01:40:38,053 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-22 01:40:38,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:40:38,054 INFO L225 Difference]: With dead ends: 33 [2022-11-22 01:40:38,054 INFO L226 Difference]: Without dead ends: 24 [2022-11-22 01:40:38,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=512, Invalid=3028, Unknown=0, NotChecked=0, Total=3540 [2022-11-22 01:40:38,057 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 121 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:40:38,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 33 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 01:40:38,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-22 01:40:38,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2022-11-22 01:40:38,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:40:38,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2022-11-22 01:40:38,060 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 13 [2022-11-22 01:40:38,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:40:38,060 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2022-11-22 01:40:38,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:40:38,061 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2022-11-22 01:40:38,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-22 01:40:38,061 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:40:38,061 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:40:38,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 01:40:38,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-22 01:40:38,267 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 01:40:38,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:40:38,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1916636440, now seen corresponding path program 1 times [2022-11-22 01:40:38,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:40:38,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085611239] [2022-11-22 01:40:38,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:40:38,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:40:38,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:40:38,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:40:38,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:40:38,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085611239] [2022-11-22 01:40:38,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085611239] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:40:38,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532996875] [2022-11-22 01:40:38,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:40:38,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:40:38,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:40:38,930 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:40:38,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 01:40:39,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:40:39,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-22 01:40:39,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:40:39,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:39,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2022-11-22 01:40:39,204 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 [2022-11-22 01:40:39,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:40:39,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:40:40,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:40:40,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532996875] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:40:40,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [68742200] [2022-11-22 01:40:40,498 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-22 01:40:40,498 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:40:40,499 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:40:40,499 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:40:40,499 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:40:40,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:40,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-22 01:40:40,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:40:40,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:40:40,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:40,720 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-22 01:40:40,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-11-22 01:40:40,878 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-22 01:40:40,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-22 01:40:41,028 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-22 01:40:41,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-22 01:40:41,238 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:40:43,914 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1209#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrncpy_#t~post7#1.offset|) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (= |ULTIMATE.start_cstrncpy_#t~post7#1.base| |ULTIMATE.start_cstrncpy_~d~0#1.base|) (= (+ |ULTIMATE.start_cstrncpy_#t~post7#1.offset| 1) |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (not (= (mod |ULTIMATE.start_cstrncpy_~n#1| 18446744073709551616) 0)) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post7#1.base|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post7#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post7#1.offset| 1)) (= |#NULL.offset| 0) (exists ((|v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_37| Int) (|v_ULTIMATE.start_cstrncpy_#t~post3#1.base_38| Int) (|v_ULTIMATE.start_cstrncpy_#t~post4#1.base_38| Int) (|v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_37| Int)) (and (= (select |#valid| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_38|) 1) (= (select (select |#memory_int| |v_ULTIMATE.start_cstrncpy_#t~post3#1.base_38|) |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_37|) (select (select |#memory_int| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_38|) |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_37|)) (= (select |#valid| |v_ULTIMATE.start_cstrncpy_#t~post3#1.base_38|) 1) (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_37|) (<= (+ |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_37| 1) (select |#length| |v_ULTIMATE.start_cstrncpy_#t~post3#1.base_38|)) (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_37|) (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post3#1.base_38|) (= (select (select |#memory_int| |v_ULTIMATE.start_cstrncpy_#t~post3#1.base_38|) |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_37|) 0) (<= (+ |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_37| 1) (select |#length| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_38|)) (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_38|))) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483646) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-22 01:40:43,914 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:40:43,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:40:43,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2022-11-22 01:40:43,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792139134] [2022-11-22 01:40:43,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:40:43,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-22 01:40:43,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:40:43,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-22 01:40:43,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1637, Unknown=0, NotChecked=0, Total=1806 [2022-11-22 01:40:43,916 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 32 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:40:45,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:40:45,339 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2022-11-22 01:40:45,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-22 01:40:45,339 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 0 states have call successors, (0), 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 [2022-11-22 01:40:45,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:40:45,340 INFO L225 Difference]: With dead ends: 25 [2022-11-22 01:40:45,340 INFO L226 Difference]: Without dead ends: 19 [2022-11-22 01:40:45,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=362, Invalid=2944, Unknown=0, NotChecked=0, Total=3306 [2022-11-22 01:40:45,343 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 88 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:40:45,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 24 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:40:45,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-22 01:40:45,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2022-11-22 01:40:45,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:40:45,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2022-11-22 01:40:45,345 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2022-11-22 01:40:45,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:40:45,346 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2022-11-22 01:40:45,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:40:45,346 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2022-11-22 01:40:45,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-22 01:40:45,347 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:40:45,347 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1] [2022-11-22 01:40:45,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 01:40:45,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-22 01:40:45,553 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 01:40:45,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:40:45,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1917966817, now seen corresponding path program 2 times [2022-11-22 01:40:45,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:40:45,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731017232] [2022-11-22 01:40:45,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:40:45,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:40:45,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:40:46,365 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:40:46,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:40:46,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731017232] [2022-11-22 01:40:46,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731017232] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:40:46,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649028328] [2022-11-22 01:40:46,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:40:46,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:40:46,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:40:46,367 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:40:46,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 01:40:46,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 01:40:46,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:40:46,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-22 01:40:46,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:40:46,485 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 [2022-11-22 01:40:46,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:40:46,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 26 [2022-11-22 01:40:47,046 INFO L321 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2022-11-22 01:40:47,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 23 [2022-11-22 01:40:47,228 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:40:47,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:40:47,896 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:40:47,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 36 [2022-11-22 01:40:47,921 INFO L321 Elim1Store]: treesize reduction 17, result has 54.1 percent of original size [2022-11-22 01:40:47,921 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 2 case distinctions, treesize of input 26 treesize of output 31 [2022-11-22 01:40:47,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:40:47,935 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:40:47,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 35 [2022-11-22 01:40:47,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:40:47,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 01:40:48,012 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:40:48,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649028328] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:40:48,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [517846607] [2022-11-22 01:40:48,016 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 01:40:48,017 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:40:48,017 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:40:48,017 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:40:48,017 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:40:48,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:48,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-22 01:40:48,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:40:48,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:40:48,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:48,196 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-22 01:40:48,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-11-22 01:40:48,334 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-22 01:40:48,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-22 01:40:48,489 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-22 01:40:48,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-22 01:40:48,605 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:40:50,509 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1411#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-22 01:40:50,509 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:40:50,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:40:50,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 32 [2022-11-22 01:40:50,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399488483] [2022-11-22 01:40:50,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:40:50,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-22 01:40:50,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:40:50,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-22 01:40:50,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1574, Unknown=3, NotChecked=0, Total=1722 [2022-11-22 01:40:50,512 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 34 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 33 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:40:52,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:40:52,775 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2022-11-22 01:40:52,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-22 01:40:52,777 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 33 states have internal predecessors, (45), 0 states have call successors, (0), 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 [2022-11-22 01:40:52,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:40:52,778 INFO L225 Difference]: With dead ends: 25 [2022-11-22 01:40:52,778 INFO L226 Difference]: Without dead ends: 25 [2022-11-22 01:40:52,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=327, Invalid=2640, Unknown=3, NotChecked=0, Total=2970 [2022-11-22 01:40:52,780 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 105 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:40:52,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 33 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:40:52,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-22 01:40:52,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2022-11-22 01:40:52,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 20 states have (on average 1.1) internal successors, (22), 21 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:40:52,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2022-11-22 01:40:52,783 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 15 [2022-11-22 01:40:52,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:40:52,783 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2022-11-22 01:40:52,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 33 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:40:52,784 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2022-11-22 01:40:52,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-22 01:40:52,784 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:40:52,785 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1] [2022-11-22 01:40:52,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 01:40:52,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:40:52,991 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 01:40:52,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:40:52,992 INFO L85 PathProgramCache]: Analyzing trace with hash -672570847, now seen corresponding path program 2 times [2022-11-22 01:40:52,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:40:52,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355770370] [2022-11-22 01:40:52,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:40:52,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:40:53,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:40:53,535 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:40:53,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:40:53,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355770370] [2022-11-22 01:40:53,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355770370] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:40:53,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631555588] [2022-11-22 01:40:53,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:40:53,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:40:53,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:40:53,537 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:40:53,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 01:40:53,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 01:40:53,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:40:53,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-22 01:40:53,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:40:53,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:53,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2022-11-22 01:40:53,757 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 [2022-11-22 01:40:54,493 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:40:54,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:40:55,142 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:40:55,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631555588] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:40:55,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [238172629] [2022-11-22 01:40:55,144 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 01:40:55,144 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:40:55,144 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:40:55,144 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:40:55,144 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:40:55,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:55,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-22 01:40:55,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:40:55,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:40:55,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:55,325 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-22 01:40:55,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-11-22 01:40:55,464 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-22 01:40:55,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-22 01:40:55,615 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-22 01:40:55,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-22 01:40:55,726 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:40:57,599 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1617#(and (= |ULTIMATE.start_cstrncpy_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) |ULTIMATE.start_cstrncpy_#t~post4#1.offset|)) (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post3#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1) (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|)) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) 1) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-22 01:40:57,599 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:40:57,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:40:57,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2022-11-22 01:40:57,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108719092] [2022-11-22 01:40:57,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:40:57,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-22 01:40:57,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:40:57,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-22 01:40:57,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1631, Unknown=0, NotChecked=0, Total=1806 [2022-11-22 01:40:57,601 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 35 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:40:59,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:40:59,016 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2022-11-22 01:40:59,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-22 01:40:59,017 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-22 01:40:59,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:40:59,017 INFO L225 Difference]: With dead ends: 23 [2022-11-22 01:40:59,018 INFO L226 Difference]: Without dead ends: 23 [2022-11-22 01:40:59,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=340, Invalid=2630, Unknown=0, NotChecked=0, Total=2970 [2022-11-22 01:40:59,019 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 104 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:40:59,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 0 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:40:59,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-22 01:40:59,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2022-11-22 01:40:59,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:40:59,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2022-11-22 01:40:59,022 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 16 [2022-11-22 01:40:59,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:40:59,023 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2022-11-22 01:40:59,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:40:59,023 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2022-11-22 01:40:59,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-22 01:40:59,024 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:40:59,024 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1] [2022-11-22 01:40:59,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 01:40:59,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-22 01:40:59,236 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 01:40:59,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:40:59,237 INFO L85 PathProgramCache]: Analyzing trace with hash 574753840, now seen corresponding path program 3 times [2022-11-22 01:40:59,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:40:59,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050673704] [2022-11-22 01:40:59,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:40:59,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:40:59,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:41:00,272 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:41:00,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:41:00,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050673704] [2022-11-22 01:41:00,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050673704] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:41:00,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505104618] [2022-11-22 01:41:00,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:41:00,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:41:00,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:41:00,274 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:41:00,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 01:41:00,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:41:00,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:41:00,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-22 01:41:00,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:41:00,424 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 [2022-11-22 01:41:00,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:41:00,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 26 [2022-11-22 01:41:01,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2022-11-22 01:41:01,500 INFO L321 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-11-22 01:41:01,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 31 [2022-11-22 01:41:01,723 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:41:01,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:41:03,012 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:41:03,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 48 [2022-11-22 01:41:03,019 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 63 treesize of output 57 [2022-11-22 01:41:03,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 01:41:03,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 01:41:03,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 46 [2022-11-22 01:41:03,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:41:03,137 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:41:03,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505104618] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:41:03,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [85364005] [2022-11-22 01:41:03,139 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 01:41:03,139 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:41:03,140 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:41:03,140 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:41:03,140 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:41:03,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:03,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-22 01:41:03,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:41:03,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:03,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:03,326 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-22 01:41:03,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-11-22 01:41:03,468 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-22 01:41:03,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-22 01:41:03,618 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-22 01:41:03,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-22 01:41:03,721 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:41:06,092 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1852#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-22 01:41:06,092 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:41:06,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:41:06,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 43 [2022-11-22 01:41:06,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623699877] [2022-11-22 01:41:06,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:41:06,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-22 01:41:06,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:41:06,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-22 01:41:06,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=2561, Unknown=7, NotChecked=0, Total=2756 [2022-11-22 01:41:06,095 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 45 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 44 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:41:11,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:41:11,237 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2022-11-22 01:41:11,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-22 01:41:11,238 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 44 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-22 01:41:11,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:41:11,239 INFO L225 Difference]: With dead ends: 33 [2022-11-22 01:41:11,239 INFO L226 Difference]: Without dead ends: 33 [2022-11-22 01:41:11,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=488, Invalid=4752, Unknown=16, NotChecked=0, Total=5256 [2022-11-22 01:41:11,242 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 137 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 48 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:41:11,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 78 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 459 Invalid, 4 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 01:41:11,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-22 01:41:11,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2022-11-22 01:41:11,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:41:11,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2022-11-22 01:41:11,245 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 20 [2022-11-22 01:41:11,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:41:11,245 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2022-11-22 01:41:11,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 44 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:41:11,246 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2022-11-22 01:41:11,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-22 01:41:11,246 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:41:11,247 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1] [2022-11-22 01:41:11,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 01:41:11,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-22 01:41:11,447 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 01:41:11,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:41:11,448 INFO L85 PathProgramCache]: Analyzing trace with hash -488845616, now seen corresponding path program 4 times [2022-11-22 01:41:11,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:41:11,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015658017] [2022-11-22 01:41:11,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:41:11,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:41:11,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:41:13,200 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:41:13,200 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:41:13,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015658017] [2022-11-22 01:41:13,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015658017] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:41:13,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534382746] [2022-11-22 01:41:13,201 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 01:41:13,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:41:13,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:41:13,202 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:41:13,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 01:41:13,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:41:13,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 111 conjunts are in the unsatisfiable core [2022-11-22 01:41:13,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:41:13,337 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 [2022-11-22 01:41:13,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:41:13,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 26 [2022-11-22 01:41:14,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2022-11-22 01:41:14,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2022-11-22 01:41:15,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 50 [2022-11-22 01:41:16,198 INFO L321 Elim1Store]: treesize reduction 16, result has 70.9 percent of original size [2022-11-22 01:41:16,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 61 [2022-11-22 01:41:16,555 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:41:16,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:41:20,259 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:41:20,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 72 [2022-11-22 01:41:20,267 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 113 treesize of output 103 [2022-11-22 01:41:20,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 120 [2022-11-22 01:41:20,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:41:20,334 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 [2022-11-22 01:41:20,348 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 [2022-11-22 01:41:20,361 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 [2022-11-22 01:41:20,373 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 [2022-11-22 01:41:20,594 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:41:20,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534382746] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:41:20,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [607577208] [2022-11-22 01:41:20,597 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 01:41:20,597 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:41:20,597 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:41:20,597 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:41:20,597 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:41:20,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:20,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-22 01:41:20,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:41:20,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:20,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:20,732 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-22 01:41:20,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-11-22 01:41:20,849 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-22 01:41:20,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-22 01:41:20,999 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-22 01:41:21,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-22 01:41:21,080 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:41:23,895 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2205#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-22 01:41:23,895 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:41:23,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:41:23,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23, 23] total 65 [2022-11-22 01:41:23,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537183090] [2022-11-22 01:41:23,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:41:23,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-22 01:41:23,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:41:23,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-22 01:41:23,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=5194, Unknown=40, NotChecked=0, Total=5550 [2022-11-22 01:41:23,898 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 67 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 66 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:41:36,278 WARN L233 SmtUtils]: Spent 6.89s on a formula simplification. DAG size of input: 151 DAG size of output: 138 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:41:54,545 WARN L233 SmtUtils]: Spent 17.89s on a formula simplification. DAG size of input: 182 DAG size of output: 143 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:42:08,583 WARN L233 SmtUtils]: Spent 12.67s on a formula simplification. DAG size of input: 124 DAG size of output: 115 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:42:19,585 WARN L233 SmtUtils]: Spent 10.59s on a formula simplification. DAG size of input: 125 DAG size of output: 118 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:42:26,769 WARN L233 SmtUtils]: Spent 6.81s on a formula simplification. DAG size of input: 141 DAG size of output: 126 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:42:28,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-22 01:42:31,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-22 01:42:37,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:42:37,154 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2022-11-22 01:42:37,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-22 01:42:37,154 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 66 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-22 01:42:37,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:42:37,155 INFO L225 Difference]: With dead ends: 53 [2022-11-22 01:42:37,155 INFO L226 Difference]: Without dead ends: 53 [2022-11-22 01:42:37,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2026 ImplicationChecksByTransitivity, 75.5s TimeCoverageRelationStatistics Valid=937, Invalid=10769, Unknown=66, NotChecked=0, Total=11772 [2022-11-22 01:42:37,158 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 201 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 108 mSolverCounterUnsat, 34 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 34 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:42:37,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 194 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 992 Invalid, 34 Unknown, 0 Unchecked, 6.6s Time] [2022-11-22 01:42:37,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-22 01:42:37,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2022-11-22 01:42:37,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:42:37,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2022-11-22 01:42:37,163 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 30 [2022-11-22 01:42:37,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:42:37,163 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2022-11-22 01:42:37,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 66 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:42:37,164 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2022-11-22 01:42:37,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-22 01:42:37,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:42:37,165 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 1, 1, 1, 1] [2022-11-22 01:42:37,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-22 01:42:37,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-22 01:42:37,384 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 01:42:37,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:42:37,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1029964784, now seen corresponding path program 5 times [2022-11-22 01:42:37,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:42:37,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831025563] [2022-11-22 01:42:37,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:42:37,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:42:37,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:42:41,608 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:42:41,608 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:42:41,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831025563] [2022-11-22 01:42:41,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831025563] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:42:41,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196887275] [2022-11-22 01:42:41,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:42:41,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:42:41,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:42:41,610 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:42:41,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae07e853-25d4-414b-83f9-bbcfa91cc8ce/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 01:42:43,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-11-22 01:42:43,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:42:43,183 WARN L261 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 225 conjunts are in the unsatisfiable core [2022-11-22 01:42:43,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:42:43,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-22 01:42:43,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 01:42:43,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-22 01:42:44,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2022-11-22 01:42:45,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2022-11-22 01:42:45,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-11-22 01:42:46,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-11-22 01:42:47,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 53 [2022-11-22 01:42:49,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-11-22 01:42:50,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 67 [2022-11-22 01:42:51,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:51,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:51,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:51,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:51,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:51,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:51,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:51,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:51,331 INFO L321 Elim1Store]: treesize reduction 32, result has 56.2 percent of original size [2022-11-22 01:42:51,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 36 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 9 case distinctions, treesize of input 83 treesize of output 79 [2022-11-22 01:42:51,338 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2022-11-22 01:42:51,354 WARN L718 sPolynomialRelations]: Constructing 512(two to the power of 9 dual juncts. [2022-11-22 01:42:51,881 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:42:51,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:44:10,835 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:44:10,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 198 treesize of output 120 [2022-11-22 01:44:10,846 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 213 treesize of output 195 [2022-11-22 01:44:10,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 01:44:10,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 01:44:10,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 01:44:10,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 36 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 148 [2022-11-22 01:44:10,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:44:11,026 WARN L718 sPolynomialRelations]: Constructing 512(two to the power of 9 dual juncts. [2022-11-22 01:44:11,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 01:44:11,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 01:44:11,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 01:44:11,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 01:44:11,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 01:44:11,304 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:44:11,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196887275] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:44:11,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1121840583] [2022-11-22 01:44:11,306 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 01:44:11,306 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:44:11,306 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:44:11,306 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:44:11,306 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:44:11,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:11,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-22 01:44:11,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:44:11,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:44:11,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:11,469 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-22 01:44:11,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-11-22 01:44:11,602 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-22 01:44:11,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-22 01:44:11,738 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-22 01:44:11,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-22 01:44:11,816 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:44:16,342 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2791#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-22 01:44:16,342 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:44:16,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:44:16,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 39, 39] total 109 [2022-11-22 01:44:16,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531404428] [2022-11-22 01:44:16,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:44:16,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-11-22 01:44:16,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:44:16,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-11-22 01:44:16,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=787, Invalid=12954, Unknown=301, NotChecked=0, Total=14042 [2022-11-22 01:44:16,348 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 111 states, 110 states have (on average 1.3636363636363635) internal successors, (150), 110 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:46:57,245 WARN L233 SmtUtils]: Spent 2.44m on a formula simplification. DAG size of input: 294 DAG size of output: 270 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:46:59,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-22 01:47:02,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-22 01:47:03,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-22 01:47:05,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-22 01:47:07,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.29s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-22 01:47:10,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-22 01:47:11,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-22 01:47:13,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-22 01:47:16,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-22 01:47:17,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-22 01:47:19,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-22 01:47:22,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.39s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-22 01:47:25,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.96s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-22 01:47:28,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-22 01:47:31,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-22 01:47:32,305 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-22 01:47:34,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-22 01:47:37,312 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse4 (select |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post4#1.base|)) (.cse19 (select |c_#length| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|)) (.cse36 (+ 3 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) (.cse18 (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) (.cse32 (+ 6 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) (.cse34 (+ 2 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) (.cse37 (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) (.cse35 (+ 5 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) (.cse39 (+ 7 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|))) (let ((.cse8 (not (<= 0 .cse39))) (.cse9 (forall ((v_ArrVal_348 (Array Int Int)) (v_ArrVal_349 (Array Int Int)) (v_ArrVal_351 (Array Int Int)) (v_ArrVal_350 (Array Int Int)) (v_ArrVal_353 (Array Int Int)) (v_ArrVal_352 (Array Int Int)) (v_ArrVal_355 (Array Int Int)) (v_ArrVal_354 (Array Int Int))) (let ((.cse44 (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_348))) (or (= (select (select (store .cse44 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_351) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse36) 0) (= (select (select (store .cse44 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_355) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse39) 0) (= (select (select .cse44 |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) 0) (= (select (select (store .cse44 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_349) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse18) 0) (= (select (select (store .cse44 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_354) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse32) 0) (= (select (select (store .cse44 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_350) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse34) 0) (= (select (select (store .cse44 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_352) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse37) 0) (= (select (select (store .cse44 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_353) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse35) 0))))) (.cse10 (<= (+ 9 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) .cse19)) (.cse15 (<= .cse32 .cse19)) (.cse16 (not (<= 0 .cse37))) (.cse17 (forall ((v_ArrVal_351 (Array Int Int)) (v_ArrVal_353 (Array Int Int)) (v_ArrVal_352 (Array Int Int)) (v_ArrVal_355 (Array Int Int)) (v_ArrVal_354 (Array Int Int))) (let ((.cse43 (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_351))) (or (= (select (select (store .cse43 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_354) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse36) 0) (= (select (select (store .cse43 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_352) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse18) 0) (= (select (select (store .cse43 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_355) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse37) 0) (= (select (select .cse43 |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) 0) (= (select (select (store .cse43 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_353) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse34) 0))))) (.cse20 (forall ((v_ArrVal_353 (Array Int Int)) (v_ArrVal_352 (Array Int Int)) (v_ArrVal_355 (Array Int Int)) (v_ArrVal_354 (Array Int Int))) (let ((.cse42 (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_352))) (or (= (select (select .cse42 |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) 0) (= (select (select (store .cse42 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_355) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse36) 0) (= (select (select (store .cse42 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_353) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse18) 0) (= (select (select (store .cse42 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_354) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse34) 0))))) (.cse21 (<= .cse35 .cse19)) (.cse22 (not (<= 0 .cse36))) (.cse31 (div |c_ULTIMATE.start_main_~length~0#1| 18446744073709551616)) (.cse0 (<= .cse36 .cse19)) (.cse2 (forall ((v_ArrVal_355 (Array Int Int)) (v_ArrVal_354 (Array Int Int))) (let ((.cse41 (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_354))) (or (= (select (select .cse41 |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) 0) (= (select (select (store .cse41 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_355) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse18) 0))))) (.cse3 (not (<= 0 .cse18))) (.cse26 (not (<= 0 .cse35))) (.cse27 (forall ((v_ArrVal_351 (Array Int Int)) (v_ArrVal_350 (Array Int Int)) (v_ArrVal_353 (Array Int Int)) (v_ArrVal_352 (Array Int Int)) (v_ArrVal_355 (Array Int Int)) (v_ArrVal_354 (Array Int Int))) (let ((.cse40 (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_350))) (or (= (select (select (store .cse40 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_354) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse37) 0) (= (select (select (store .cse40 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_355) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse35) 0) (= (select (select (store .cse40 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_352) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse34) 0) (= (select (select (store .cse40 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_353) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse36) 0) (= (select (select .cse40 |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) 0) (= (select (select (store .cse40 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_351) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse18) 0))))) (.cse28 (<= .cse39 .cse19)) (.cse12 (<= .cse37 .cse19)) (.cse13 (forall ((v_ArrVal_353 (Array Int Int)) (v_ArrVal_355 (Array Int Int)) (v_ArrVal_354 (Array Int Int))) (let ((.cse38 (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_353))) (or (= (select (select (store .cse38 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_354) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse18) 0) (= (select (select .cse38 |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) 0) (= (select (select (store .cse38 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_355) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse34) 0))))) (.cse14 (not (<= 0 .cse34))) (.cse1 (= |c_ULTIMATE.start_cstrncpy_#t~mem5#1| 0)) (.cse23 (forall ((v_ArrVal_355 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_355) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) 0))) (.cse24 (<= .cse34 .cse19)) (.cse25 (not (<= 0 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|))) (.cse5 (forall ((v_ArrVal_349 (Array Int Int)) (v_ArrVal_351 (Array Int Int)) (v_ArrVal_350 (Array Int Int)) (v_ArrVal_353 (Array Int Int)) (v_ArrVal_352 (Array Int Int)) (v_ArrVal_355 (Array Int Int)) (v_ArrVal_354 (Array Int Int))) (let ((.cse33 (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_349))) (or (= (select (select .cse33 |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) 0) (= (select (select (store .cse33 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_351) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse34) 0) (= (select (select (store .cse33 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_350) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse18) 0) (= (select (select (store .cse33 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_354) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse35) 0) (= (select (select (store .cse33 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_352) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse36) 0) (= (select (select (store .cse33 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_355) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse32) 0) (= (select (select (store .cse33 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_353) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse37) 0))))) (.cse6 (not (<= 0 .cse32))) (.cse11 (= (select .cse4 |c_ULTIMATE.start_cstrncpy_#t~post4#1.offset|) 0)) (.cse7 (<= (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 8) .cse19))) (and (or .cse0 .cse1 .cse2 .cse3) (not (= (select .cse4 5) 0)) (or .cse5 .cse6 .cse1 .cse7) (or .cse8 .cse1 .cse9 .cse10) (or .cse8 .cse11 .cse9 .cse10) (= 0 |c_ULTIMATE.start_main_~nondetArea~0#1.offset|) (= (+ |c_ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) (or .cse12 .cse13 .cse14 .cse11) (exists ((|ULTIMATE.start_main_~length~0#1| Int)) (and (= (select .cse4 (+ (- 1) |ULTIMATE.start_main_~length~0#1|)) 0) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~length~0#1| (select |c_#length| |c_ULTIMATE.start_cstrncpy_#t~post4#1.base|)))) (= 9 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) (or .cse15 .cse16 .cse1 .cse17) (or .cse15 .cse16 .cse11 .cse17) (or (<= .cse18 .cse19) (and (<= 9 .cse19) .cse1)) (or .cse20 .cse21 .cse22 .cse11) (not (= (select .cse4 6) 0)) (not (= (select .cse4 0) 0)) (or .cse23 .cse1 .cse24 .cse25) (not (= (select .cse4 4) 0)) (or .cse26 .cse27 .cse1 .cse28) (not (= |c_ULTIMATE.start_main_~nondetString~0#1.base| |c_ULTIMATE.start_main_~nondetArea~0#1.base|)) (let ((.cse30 (<= (+ .cse31 1) 0)) (.cse29 (+ |c_ULTIMATE.start_main_~nondetString~0#1.offset| 1))) (or (and (<= |c_ULTIMATE.start_main_~length~0#1| .cse29) (not .cse30)) (and (or .cse30 (<= 0 |c_ULTIMATE.start_main_~nondetString~0#1.offset|)) (<= .cse29 |c_ULTIMATE.start_main_~length~0#1|)))) (= |c_ULTIMATE.start_main_~nondetString~0#1.offset| 0) (or .cse20 .cse21 .cse22 .cse1) (= |c_ULTIMATE.start_main_~length~0#1| (+ (select |c_#length| |c_ULTIMATE.start_main_~nondetString~0#1.base|) (* 18446744073709551616 .cse31))) (not (= (select .cse4 2) 0)) (not (= (select .cse4 3) 0)) (or .cse0 .cse11 .cse2 .cse3) (= 8 |c_ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (or .cse26 .cse27 .cse11 .cse28) (or (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) 0) .cse1 .cse24 .cse25) (or .cse12 .cse13 .cse14 .cse1) (not (= (select .cse4 1) 0)) (or .cse23 .cse11 .cse24 .cse25) (= |c_ULTIMATE.start_cstrncpy_#t~post4#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (or .cse5 .cse6 .cse11 .cse7) (not (= (select .cse4 7) 0))))) is different from true [2022-11-22 01:49:11,788 WARN L233 SmtUtils]: Spent 1.49m on a formula simplification. DAG size of input: 203 DAG size of output: 184 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:49:13,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:49:14,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:49:17,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:49:20,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:49:21,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-22 01:49:22,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:52:23,364 WARN L233 SmtUtils]: Spent 2.61m on a formula simplification. DAG size of input: 213 DAG size of output: 194 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:52:24,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:52:26,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:52:27,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-22 01:52:28,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:52:33,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:52:36,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:52:38,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:52:41,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:52:42,068 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:53:25,378 WARN L233 SmtUtils]: Spent 35.71s on a formula simplification. DAG size of input: 166 DAG size of output: 149 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:53:27,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:53:29,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.26s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:53:31,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:53:34,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:53:36,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:54:33,344 WARN L233 SmtUtils]: Spent 50.47s on a formula simplification. DAG size of input: 179 DAG size of output: 158 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:54:35,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:54:37,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.25s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:54:40,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:54:42,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:54:45,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]