./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-memory-alloca/openbsd_cstrcspn-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_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/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_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-memory-alloca/openbsd_cstrcspn-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/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_5820cc34-d537-4fab-8f84-3cb0f42c5e41/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 de88cb9f8af309bfee7e34496a9472de4d446e8ed690818c0d2fc3e900b2d7c4 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 00:18:34,702 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 00:18:34,705 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 00:18:34,725 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 00:18:34,726 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 00:18:34,727 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 00:18:34,728 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 00:18:34,730 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 00:18:34,732 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 00:18:34,733 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 00:18:34,734 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 00:18:34,735 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 00:18:34,736 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 00:18:34,737 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 00:18:34,738 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 00:18:34,740 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 00:18:34,740 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 00:18:34,742 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 00:18:34,743 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 00:18:34,745 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 00:18:34,747 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 00:18:34,750 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 00:18:34,751 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 00:18:34,752 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 00:18:34,756 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 00:18:34,756 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 00:18:34,756 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 00:18:34,757 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 00:18:34,758 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 00:18:34,759 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 00:18:34,759 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 00:18:34,760 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 00:18:34,761 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 00:18:34,761 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 00:18:34,762 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 00:18:34,763 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 00:18:34,763 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 00:18:34,764 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 00:18:34,764 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 00:18:34,773 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 00:18:34,774 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 00:18:34,775 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2022-11-22 00:18:34,815 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 00:18:34,815 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 00:18:34,815 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 00:18:34,815 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 00:18:34,816 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 00:18:34,816 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 00:18:34,816 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 00:18:34,817 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 00:18:34,821 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 00:18:34,822 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 00:18:34,823 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 00:18:34,823 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 00:18:34,823 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 00:18:34,824 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 00:18:34,824 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 00:18:34,824 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 00:18:34,824 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 00:18:34,824 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 00:18:34,825 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-22 00:18:34,825 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-22 00:18:34,826 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 00:18:34,826 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 00:18:34,826 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 00:18:34,827 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 00:18:34,827 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-22 00:18:34,827 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-22 00:18:34,827 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-22 00:18:34,828 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 00:18:34,828 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-22 00:18:34,828 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 00:18:34,828 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 00:18:34,829 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 00:18:34,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:18:34,829 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 00:18:34,829 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 00:18:34,830 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 00:18:34,830 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 00:18:34,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 00:18:34,830 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 00:18:34,830 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_5820cc34-d537-4fab-8f84-3cb0f42c5e41/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de88cb9f8af309bfee7e34496a9472de4d446e8ed690818c0d2fc3e900b2d7c4 [2022-11-22 00:18:35,136 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 00:18:35,159 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 00:18:35,162 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 00:18:35,163 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 00:18:35,164 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 00:18:35,165 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/termination-memory-alloca/openbsd_cstrcspn-alloca-1.i [2022-11-22 00:18:38,346 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 00:18:38,749 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 00:18:38,750 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/sv-benchmarks/c/termination-memory-alloca/openbsd_cstrcspn-alloca-1.i [2022-11-22 00:18:38,763 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/data/2f8c4769e/404094daa2d84c139c6ebce3f0483992/FLAG7bcb79b7a [2022-11-22 00:18:38,964 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/data/2f8c4769e/404094daa2d84c139c6ebce3f0483992 [2022-11-22 00:18:38,967 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 00:18:38,969 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 00:18:38,971 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 00:18:38,971 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 00:18:38,975 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 00:18:38,976 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:18:38" (1/1) ... [2022-11-22 00:18:38,977 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2791946a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:18:38, skipping insertion in model container [2022-11-22 00:18:38,978 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:18:38" (1/1) ... [2022-11-22 00:18:38,987 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 00:18:39,022 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 00:18:39,326 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:18:39,344 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 00:18:39,413 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:18:39,462 INFO L208 MainTranslator]: Completed translation [2022-11-22 00:18:39,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:18:39 WrapperNode [2022-11-22 00:18:39,463 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 00:18:39,465 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 00:18:39,465 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 00:18:39,465 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 00:18:39,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:18:39" (1/1) ... [2022-11-22 00:18:39,501 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:18:39" (1/1) ... [2022-11-22 00:18:39,534 INFO L138 Inliner]: procedures = 111, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 66 [2022-11-22 00:18:39,535 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 00:18:39,536 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 00:18:39,536 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 00:18:39,537 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 00:18:39,547 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:18:39" (1/1) ... [2022-11-22 00:18:39,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:18:39" (1/1) ... [2022-11-22 00:18:39,561 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:18:39" (1/1) ... [2022-11-22 00:18:39,562 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:18:39" (1/1) ... [2022-11-22 00:18:39,567 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:18:39" (1/1) ... [2022-11-22 00:18:39,571 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:18:39" (1/1) ... [2022-11-22 00:18:39,573 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:18:39" (1/1) ... [2022-11-22 00:18:39,574 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:18:39" (1/1) ... [2022-11-22 00:18:39,576 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 00:18:39,577 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 00:18:39,578 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 00:18:39,578 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 00:18:39,579 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:18:39" (1/1) ... [2022-11-22 00:18:39,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:18:39,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:18:39,614 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 00:18:39,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 00:18:39,667 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 00:18:39,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 00:18:39,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 00:18:39,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 00:18:39,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 00:18:39,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 00:18:39,800 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 00:18:39,803 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 00:18:39,993 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 00:18:40,067 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 00:18:40,068 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-22 00:18:40,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:18:40 BoogieIcfgContainer [2022-11-22 00:18:40,071 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 00:18:40,073 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 00:18:40,073 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 00:18:40,077 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 00:18:40,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:18:38" (1/3) ... [2022-11-22 00:18:40,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3413e6da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:18:40, skipping insertion in model container [2022-11-22 00:18:40,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:18:39" (2/3) ... [2022-11-22 00:18:40,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3413e6da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:18:40, skipping insertion in model container [2022-11-22 00:18:40,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:18:40" (3/3) ... [2022-11-22 00:18:40,095 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcspn-alloca-1.i [2022-11-22 00:18:40,129 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 00:18:40,130 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2022-11-22 00:18:40,188 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 00:18:40,195 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;@49e508c1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 00:18:40,196 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-11-22 00:18:40,201 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 11 states have (on average 2.1818181818181817) 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 00:18:40,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 00:18:40,208 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:18:40,209 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 00:18:40,210 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 00:18:40,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:18:40,216 INFO L85 PathProgramCache]: Analyzing trace with hash 3303, now seen corresponding path program 1 times [2022-11-22 00:18:40,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:18:40,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447994299] [2022-11-22 00:18:40,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:40,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:18:40,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:40,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:18:40,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:18:40,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447994299] [2022-11-22 00:18:40,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447994299] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:18:40,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:18:40,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 00:18:40,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080102841] [2022-11-22 00:18:40,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:18:40,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:18:40,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:18:40,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:18:40,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:18:40,773 INFO L87 Difference]: Start difference. First operand has 21 states, 11 states have (on average 2.1818181818181817) 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) 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 00:18:40,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:18:40,886 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2022-11-22 00:18:40,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:18:40,889 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 00:18:40,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:18:40,903 INFO L225 Difference]: With dead ends: 20 [2022-11-22 00:18:40,910 INFO L226 Difference]: Without dead ends: 19 [2022-11-22 00:18:40,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:18:40,917 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 17 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:18:40,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 10 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:18:40,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-22 00:18:40,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-22 00:18:40,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:40,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-11-22 00:18:40,952 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 2 [2022-11-22 00:18:40,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:18:40,953 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-11-22 00:18:40,953 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 00:18:40,954 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-11-22 00:18:40,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 00:18:40,954 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:18:40,954 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 00:18:40,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 00:18:40,955 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 00:18:40,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:18:40,956 INFO L85 PathProgramCache]: Analyzing trace with hash 3304, now seen corresponding path program 1 times [2022-11-22 00:18:40,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:18:40,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225227239] [2022-11-22 00:18:40,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:40,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:18:41,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:41,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:18:41,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:18:41,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225227239] [2022-11-22 00:18:41,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225227239] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:18:41,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:18:41,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 00:18:41,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131287477] [2022-11-22 00:18:41,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:18:41,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:18:41,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:18:41,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:18:41,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:18:41,433 INFO L87 Difference]: Start difference. First operand 19 states and 20 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 00:18:41,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:18:41,469 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2022-11-22 00:18:41,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:18:41,471 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 00:18:41,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:18:41,472 INFO L225 Difference]: With dead ends: 18 [2022-11-22 00:18:41,472 INFO L226 Difference]: Without dead ends: 18 [2022-11-22 00:18:41,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:18:41,480 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:18:41,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 11 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:18:41,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-22 00:18:41,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-22 00:18:41,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:41,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-11-22 00:18:41,484 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 2 [2022-11-22 00:18:41,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:18:41,484 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-11-22 00:18:41,485 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 00:18:41,485 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-11-22 00:18:41,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-22 00:18:41,485 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:18:41,485 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-22 00:18:41,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 00:18:41,486 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 00:18:41,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:18:41,487 INFO L85 PathProgramCache]: Analyzing trace with hash 102382, now seen corresponding path program 1 times [2022-11-22 00:18:41,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:18:41,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390882109] [2022-11-22 00:18:41,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:41,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:18:41,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:41,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:18:41,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:18:41,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390882109] [2022-11-22 00:18:41,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390882109] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:18:41,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:18:41,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 00:18:41,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556375837] [2022-11-22 00:18:41,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:18:41,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:18:41,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:18:41,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:18:41,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:18:41,575 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:41,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:18:41,605 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2022-11-22 00:18:41,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:18:41,607 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-22 00:18:41,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:18:41,610 INFO L225 Difference]: With dead ends: 17 [2022-11-22 00:18:41,610 INFO L226 Difference]: Without dead ends: 17 [2022-11-22 00:18:41,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:18:41,613 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:18:41,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 9 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:18:41,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-22 00:18:41,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-22 00:18:41,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:41,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-11-22 00:18:41,618 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 3 [2022-11-22 00:18:41,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:18:41,618 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-11-22 00:18:41,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:41,619 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-11-22 00:18:41,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-22 00:18:41,619 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:18:41,619 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-22 00:18:41,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 00:18:41,620 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 00:18:41,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:18:41,621 INFO L85 PathProgramCache]: Analyzing trace with hash 102383, now seen corresponding path program 1 times [2022-11-22 00:18:41,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:18:41,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498073952] [2022-11-22 00:18:41,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:41,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:18:41,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:41,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:18:41,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:18:41,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498073952] [2022-11-22 00:18:41,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498073952] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:18:41,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:18:41,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 00:18:41,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120929042] [2022-11-22 00:18:41,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:18:41,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:18:41,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:18:41,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:18:41,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:18:41,899 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:41,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:18:41,931 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2022-11-22 00:18:41,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:18:41,932 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-22 00:18:41,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:18:41,933 INFO L225 Difference]: With dead ends: 16 [2022-11-22 00:18:41,933 INFO L226 Difference]: Without dead ends: 16 [2022-11-22 00:18:41,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:18:41,941 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 31 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:18:41,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 10 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:18:41,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-22 00:18:41,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-22 00:18:41,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:41,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-11-22 00:18:41,945 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 3 [2022-11-22 00:18:41,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:18:41,946 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-11-22 00:18:41,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:41,946 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-11-22 00:18:41,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 00:18:41,947 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:18:41,947 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-22 00:18:41,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 00:18:41,947 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 00:18:41,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:18:41,949 INFO L85 PathProgramCache]: Analyzing trace with hash 98433309, now seen corresponding path program 1 times [2022-11-22 00:18:41,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:18:41,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267425187] [2022-11-22 00:18:41,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:41,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:18:41,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:42,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:18:42,043 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:18:42,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267425187] [2022-11-22 00:18:42,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267425187] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:18:42,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:18:42,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:18:42,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468617439] [2022-11-22 00:18:42,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:18:42,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 00:18:42,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:18:42,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 00:18:42,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:18:42,047 INFO L87 Difference]: Start difference. First operand 16 states and 17 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 00:18:42,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:18:42,109 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2022-11-22 00:18:42,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:18:42,110 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 00:18:42,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:18:42,111 INFO L225 Difference]: With dead ends: 15 [2022-11-22 00:18:42,111 INFO L226 Difference]: Without dead ends: 15 [2022-11-22 00:18:42,111 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 00:18:42,114 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 23 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:18:42,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 13 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:18:42,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-22 00:18:42,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-22 00:18:42,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:42,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-11-22 00:18:42,142 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 5 [2022-11-22 00:18:42,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:18:42,143 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-11-22 00:18:42,143 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 00:18:42,145 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-11-22 00:18:42,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 00:18:42,146 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:18:42,150 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-22 00:18:42,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 00:18:42,151 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 00:18:42,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:18:42,152 INFO L85 PathProgramCache]: Analyzing trace with hash 98433310, now seen corresponding path program 1 times [2022-11-22 00:18:42,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:18:42,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636977992] [2022-11-22 00:18:42,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:42,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:18:42,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:42,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:18:42,361 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:18:42,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636977992] [2022-11-22 00:18:42,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636977992] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:18:42,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:18:42,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:18:42,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356124651] [2022-11-22 00:18:42,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:18:42,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 00:18:42,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:18:42,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 00:18:42,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:18:42,365 INFO L87 Difference]: Start difference. First operand 15 states and 16 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 00:18:42,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:18:42,444 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2022-11-22 00:18:42,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:18:42,445 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 00:18:42,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:18:42,446 INFO L225 Difference]: With dead ends: 17 [2022-11-22 00:18:42,447 INFO L226 Difference]: Without dead ends: 17 [2022-11-22 00:18:42,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-22 00:18:42,449 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 17 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:18:42,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 23 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:18:42,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-22 00:18:42,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-22 00:18:42,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:42,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-11-22 00:18:42,458 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 5 [2022-11-22 00:18:42,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:18:42,458 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-11-22 00:18:42,458 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 00:18:42,459 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-11-22 00:18:42,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 00:18:42,459 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:18:42,459 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:18:42,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 00:18:42,461 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 00:18:42,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:18:42,463 INFO L85 PathProgramCache]: Analyzing trace with hash 105165251, now seen corresponding path program 1 times [2022-11-22 00:18:42,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:18:42,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462309792] [2022-11-22 00:18:42,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:42,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:18:42,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:42,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:18:42,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:18:42,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462309792] [2022-11-22 00:18:42,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462309792] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:18:42,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:18:42,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:18:42,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194165682] [2022-11-22 00:18:42,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:18:42,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 00:18:42,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:18:42,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 00:18:42,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:18:42,583 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:42,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:18:42,641 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2022-11-22 00:18:42,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:18:42,642 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-22 00:18:42,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:18:42,642 INFO L225 Difference]: With dead ends: 16 [2022-11-22 00:18:42,642 INFO L226 Difference]: Without dead ends: 16 [2022-11-22 00:18:42,643 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 00:18:42,645 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:18:42,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 15 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:18:42,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-22 00:18:42,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-22 00:18:42,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:42,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-11-22 00:18:42,649 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 7 [2022-11-22 00:18:42,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:18:42,649 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-11-22 00:18:42,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:42,650 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-11-22 00:18:42,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 00:18:42,651 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:18:42,651 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:18:42,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 00:18:42,651 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 00:18:42,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:18:42,652 INFO L85 PathProgramCache]: Analyzing trace with hash 105165252, now seen corresponding path program 1 times [2022-11-22 00:18:42,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:18:42,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560436742] [2022-11-22 00:18:42,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:42,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:18:42,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:42,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:18:42,823 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:18:42,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560436742] [2022-11-22 00:18:42,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560436742] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:18:42,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:18:42,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:18:42,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483304592] [2022-11-22 00:18:42,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:18:42,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 00:18:42,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:18:42,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 00:18:42,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:18:42,826 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:42,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:18:42,899 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2022-11-22 00:18:42,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 00:18:42,900 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-22 00:18:42,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:18:42,900 INFO L225 Difference]: With dead ends: 19 [2022-11-22 00:18:42,901 INFO L226 Difference]: Without dead ends: 19 [2022-11-22 00:18:42,901 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 00:18:42,902 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:18:42,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 20 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:18:42,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-22 00:18:42,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2022-11-22 00:18:42,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:42,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-11-22 00:18:42,904 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 7 [2022-11-22 00:18:42,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:18:42,905 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-11-22 00:18:42,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:42,905 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-11-22 00:18:42,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-22 00:18:42,906 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:18:42,906 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:18:42,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 00:18:42,906 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 00:18:42,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:18:42,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1947653490, now seen corresponding path program 1 times [2022-11-22 00:18:42,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:18:42,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770260076] [2022-11-22 00:18:42,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:42,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:18:42,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:43,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:18:43,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:18:43,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770260076] [2022-11-22 00:18:43,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770260076] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:18:43,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:18:43,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 00:18:43,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959796025] [2022-11-22 00:18:43,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:18:43,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:18:43,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:18:43,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:18:43,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:18:43,081 INFO L87 Difference]: Start difference. First operand 18 states and 19 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 00:18:43,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:18:43,116 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2022-11-22 00:18:43,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:18:43,117 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 00:18:43,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:18:43,118 INFO L225 Difference]: With dead ends: 17 [2022-11-22 00:18:43,118 INFO L226 Difference]: Without dead ends: 15 [2022-11-22 00:18:43,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:18:43,121 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 5 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:18:43,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 16 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:18:43,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-22 00:18:43,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-22 00:18:43,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:43,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-11-22 00:18:43,125 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2022-11-22 00:18:43,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:18:43,125 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-11-22 00:18:43,126 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 00:18:43,126 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-11-22 00:18:43,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-22 00:18:43,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:18:43,127 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:18:43,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 00:18:43,127 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 00:18:43,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:18:43,128 INFO L85 PathProgramCache]: Analyzing trace with hash 247766020, now seen corresponding path program 1 times [2022-11-22 00:18:43,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:18:43,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183073970] [2022-11-22 00:18:43,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:43,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:18:43,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:43,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:18:43,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:18:43,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183073970] [2022-11-22 00:18:43,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183073970] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:18:43,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253811025] [2022-11-22 00:18:43,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:43,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:18:43,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:18:43,780 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:18:43,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 00:18:43,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:43,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-22 00:18:43,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:18:43,972 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 00:18:44,023 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 00:18:44,117 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 17 treesize of output 19 [2022-11-22 00:18:44,283 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:18:44,283 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 15 [2022-11-22 00:18:44,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:18:44,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:18:44,909 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:18:44,909 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2022-11-22 00:18:44,925 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:18:44,926 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 33 treesize of output 30 [2022-11-22 00:18:44,945 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 9 treesize of output 7 [2022-11-22 00:18:44,957 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 5 treesize of output 3 [2022-11-22 00:18:45,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:18:45,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253811025] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:18:45,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1407865264] [2022-11-22 00:18:45,023 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 00:18:45,023 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:18:45,028 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:18:45,034 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:18:45,034 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:18:45,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:45,097 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 00:18:45,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:18:45,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:45,215 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 25 treesize of output 24 [2022-11-22 00:18:46,111 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:18:47,855 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '471#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-22 00:18:47,855 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:18:47,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:18:47,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2022-11-22 00:18:47,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927757612] [2022-11-22 00:18:47,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:18:47,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-22 00:18:47,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:18:47,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-22 00:18:47,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2022-11-22 00:18:47,857 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 24 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:48,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:18:48,679 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2022-11-22 00:18:48,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-22 00:18:48,680 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-22 00:18:48,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:18:48,680 INFO L225 Difference]: With dead ends: 24 [2022-11-22 00:18:48,680 INFO L226 Difference]: Without dead ends: 24 [2022-11-22 00:18:48,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=228, Invalid=1412, Unknown=0, NotChecked=0, Total=1640 [2022-11-22 00:18:48,681 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 138 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:18:48,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 24 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:18:48,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-22 00:18:48,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-11-22 00:18:48,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 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 00:18:48,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-11-22 00:18:48,684 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 11 [2022-11-22 00:18:48,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:18:48,684 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-11-22 00:18:48,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:48,685 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-11-22 00:18:48,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-22 00:18:48,685 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:18:48,685 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:18:48,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 00:18:48,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:18:48,886 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 00:18:48,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:18:48,886 INFO L85 PathProgramCache]: Analyzing trace with hash 247768198, now seen corresponding path program 1 times [2022-11-22 00:18:48,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:18:48,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879537979] [2022-11-22 00:18:48,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:48,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:18:48,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:49,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:18:49,393 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:18:49,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879537979] [2022-11-22 00:18:49,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879537979] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:18:49,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134564001] [2022-11-22 00:18:49,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:49,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:18:49,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:18:49,396 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:18:49,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 00:18:49,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:49,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-22 00:18:49,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:18:49,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:18:49,709 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:18:49,709 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 15 [2022-11-22 00:18:49,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:18:49,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:18:50,096 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 00:18:50,102 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 00:18:50,108 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 14 treesize of output 12 [2022-11-22 00:18:50,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:18:50,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134564001] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:18:50,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1644476587] [2022-11-22 00:18:50,129 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 00:18:50,130 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:18:50,130 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:18:50,130 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:18:50,131 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:18:50,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:50,163 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 00:18:50,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:18:50,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:50,243 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 25 treesize of output 24 [2022-11-22 00:18:50,674 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:18:52,585 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '626#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-11-22 00:18:52,586 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:18:52,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:18:52,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2022-11-22 00:18:52,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868549973] [2022-11-22 00:18:52,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:18:52,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-22 00:18:52,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:18:52,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-22 00:18:52,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2022-11-22 00:18:52,588 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 22 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:53,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:18:53,428 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2022-11-22 00:18:53,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 00:18:53,428 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 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) Word has length 11 [2022-11-22 00:18:53,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:18:53,430 INFO L225 Difference]: With dead ends: 38 [2022-11-22 00:18:53,430 INFO L226 Difference]: Without dead ends: 38 [2022-11-22 00:18:53,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=224, Invalid=1258, Unknown=0, NotChecked=0, Total=1482 [2022-11-22 00:18:53,431 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 104 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:18:53,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 17 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 00:18:53,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-22 00:18:53,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2022-11-22 00:18:53,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:53,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-11-22 00:18:53,436 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 11 [2022-11-22 00:18:53,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:18:53,436 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-11-22 00:18:53,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:53,436 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-11-22 00:18:53,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-22 00:18:53,437 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:18:53,441 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-22 00:18:53,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-22 00:18:53,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-22 00:18:53,648 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 00:18:53,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:18:53,648 INFO L85 PathProgramCache]: Analyzing trace with hash 480863816, now seen corresponding path program 2 times [2022-11-22 00:18:53,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:18:53,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267064950] [2022-11-22 00:18:53,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:53,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:18:53,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:54,389 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:18:54,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:18:54,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267064950] [2022-11-22 00:18:54,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267064950] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:18:54,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616770158] [2022-11-22 00:18:54,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:18:54,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:18:54,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:18:54,391 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:18:54,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 00:18:54,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 00:18:54,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:18:54,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-22 00:18:54,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:18:54,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:18:55,044 INFO L321 Elim1Store]: treesize reduction 4, result has 81.8 percent of original size [2022-11-22 00:18:55,044 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 28 [2022-11-22 00:18:55,238 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:18:55,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:18:55,827 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 29 treesize of output 25 [2022-11-22 00:18:55,833 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 00:18:55,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2022-11-22 00:18:55,864 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:18:55,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616770158] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:18:55,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [788015850] [2022-11-22 00:18:55,867 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 00:18:55,867 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:18:55,868 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:18:55,868 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:18:55,868 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:18:55,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:55,909 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 00:18:55,950 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 00:18:55,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:55,993 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 25 treesize of output 24 [2022-11-22 00:18:56,400 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:18:58,454 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '835#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-11-22 00:18:58,454 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:18:58,454 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:18:58,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 28 [2022-11-22 00:18:58,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136065022] [2022-11-22 00:18:58,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:18:58,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-22 00:18:58,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:18:58,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-22 00:18:58,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1266, Unknown=0, NotChecked=0, Total=1406 [2022-11-22 00:18:58,456 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 30 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:19:01,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:19:01,770 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2022-11-22 00:19:01,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-22 00:19:01,774 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-22 00:19:01,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:19:01,775 INFO L225 Difference]: With dead ends: 57 [2022-11-22 00:19:01,775 INFO L226 Difference]: Without dead ends: 57 [2022-11-22 00:19:01,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=371, Invalid=2491, Unknown=0, NotChecked=0, Total=2862 [2022-11-22 00:19:01,776 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 125 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 00:19:01,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 47 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 00:19:01,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-22 00:19:01,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 47. [2022-11-22 00:19:01,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 46 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:19:01,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2022-11-22 00:19:01,790 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 15 [2022-11-22 00:19:01,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:19:01,801 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2022-11-22 00:19:01,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:19:01,802 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2022-11-22 00:19:01,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-22 00:19:01,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:19:01,802 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-11-22 00:19:01,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 00:19:02,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-22 00:19:02,003 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 00:19:02,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:19:02,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1954350486, now seen corresponding path program 2 times [2022-11-22 00:19:02,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:19:02,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414491692] [2022-11-22 00:19:02,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:02,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:19:02,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:19:02,988 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:19:02,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:19:02,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414491692] [2022-11-22 00:19:02,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414491692] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:19:02,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084970112] [2022-11-22 00:19:02,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:19:02,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:19:02,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:19:02,990 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:19:03,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 00:19:03,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 00:19:03,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:19:03,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-22 00:19:03,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:19:03,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:19:03,231 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 00:19:03,232 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 16 treesize of output 22 [2022-11-22 00:19:03,238 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 00:19:04,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:04,165 INFO L321 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2022-11-22 00:19:04,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 57 [2022-11-22 00:19:04,457 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:19:04,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:19:05,569 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:19:05,569 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2022-11-22 00:19:05,589 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:19:05,590 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 62 treesize of output 61 [2022-11-22 00:19:05,611 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:19:05,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 39 treesize of output 45 [2022-11-22 00:19:05,634 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 18 [2022-11-22 00:19:05,800 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:19:05,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084970112] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:19:05,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [318849005] [2022-11-22 00:19:05,802 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 00:19:05,802 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:19:05,803 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:19:05,803 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:19:05,803 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:19:05,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:05,854 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 00:19:05,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:19:05,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:05,950 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 25 treesize of output 24 [2022-11-22 00:19:06,452 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:19:08,431 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1119#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-22 00:19:08,431 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:19:08,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:19:08,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2022-11-22 00:19:08,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930467298] [2022-11-22 00:19:08,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:19:08,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-22 00:19:08,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:19:08,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-22 00:19:08,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=2448, Unknown=0, NotChecked=0, Total=2652 [2022-11-22 00:19:08,434 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 44 states, 43 states have (on average 1.186046511627907) internal successors, (51), 43 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 00:19:16,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:19:16,563 INFO L93 Difference]: Finished difference Result 101 states and 118 transitions. [2022-11-22 00:19:16,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-22 00:19:16,563 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.186046511627907) internal successors, (51), 43 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) Word has length 17 [2022-11-22 00:19:16,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:19:16,564 INFO L225 Difference]: With dead ends: 101 [2022-11-22 00:19:16,564 INFO L226 Difference]: Without dead ends: 101 [2022-11-22 00:19:16,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1506 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=1034, Invalid=7708, Unknown=0, NotChecked=0, Total=8742 [2022-11-22 00:19:16,568 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 411 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 00:19:16,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 27 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 00:19:16,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-22 00:19:16,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 95. [2022-11-22 00:19:16,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 93 states have (on average 1.2473118279569892) internal successors, (116), 94 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:19:16,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 116 transitions. [2022-11-22 00:19:16,577 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 116 transitions. Word has length 17 [2022-11-22 00:19:16,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:19:16,577 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 116 transitions. [2022-11-22 00:19:16,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.186046511627907) internal successors, (51), 43 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 00:19:16,578 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 116 transitions. [2022-11-22 00:19:16,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-22 00:19:16,578 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:19:16,579 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-22 00:19:16,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 00:19:16,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:19:16,785 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 00:19:16,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:19:16,786 INFO L85 PathProgramCache]: Analyzing trace with hash 543381196, now seen corresponding path program 3 times [2022-11-22 00:19:16,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:19:16,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596074539] [2022-11-22 00:19:16,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:16,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:19:16,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:19:17,660 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:19:17,660 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:19:17,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596074539] [2022-11-22 00:19:17,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596074539] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:19:17,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338926967] [2022-11-22 00:19:17,661 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 00:19:17,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:19:17,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:19:17,666 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:19:17,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 00:19:17,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 00:19:17,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:19:17,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-22 00:19:17,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:19:17,810 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 00:19:17,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 00:19:17,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:19:33,634 INFO L321 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2022-11-22 00:19:33,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 39 [2022-11-22 00:19:33,764 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 14 refuted. 16 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:19:33,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:19:35,365 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 59 treesize of output 51 [2022-11-22 00:19:35,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 45 [2022-11-22 00:19:35,507 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:19:35,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338926967] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:19:35,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [937216312] [2022-11-22 00:19:35,511 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 00:19:35,511 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:19:35,511 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:19:35,512 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:19:35,512 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:19:35,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:35,548 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 00:19:35,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:19:35,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:35,642 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 25 treesize of output 24 [2022-11-22 00:19:36,013 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:19:39,002 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1582#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-11-22 00:19:39,002 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:19:39,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:19:39,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 16] total 41 [2022-11-22 00:19:39,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540835878] [2022-11-22 00:19:39,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:19:39,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-22 00:19:39,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:19:39,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-22 00:19:39,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=2306, Unknown=17, NotChecked=0, Total=2550 [2022-11-22 00:19:39,005 INFO L87 Difference]: Start difference. First operand 95 states and 116 transitions. Second operand has 43 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 42 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:19:42,607 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] [2022-11-22 00:19:46,548 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:19:49,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:19:52,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:19:56,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:20:02,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:20:04,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:20:10,639 WARN L233 SmtUtils]: Spent 5.67s on a formula simplification. DAG size of input: 81 DAG size of output: 75 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 00:20:12,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:20:26,041 WARN L233 SmtUtils]: Spent 5.70s on a formula simplification. DAG size of input: 91 DAG size of output: 83 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 00:20:28,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:20:30,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:20:46,835 WARN L233 SmtUtils]: Spent 7.00s on a formula simplification. DAG size of input: 95 DAG size of output: 88 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 00:20:48,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:21:01,881 WARN L233 SmtUtils]: Spent 12.93s on a formula simplification. DAG size of input: 103 DAG size of output: 96 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 00:21:03,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:21:11,034 WARN L233 SmtUtils]: Spent 7.84s on a formula simplification. DAG size of input: 89 DAG size of output: 84 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 00:21:13,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:21:33,238 WARN L233 SmtUtils]: Spent 20.04s on a formula simplification. DAG size of input: 137 DAG size of output: 99 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 00:21:35,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:21:44,255 WARN L233 SmtUtils]: Spent 7.69s on a formula simplification. DAG size of input: 95 DAG size of output: 82 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 00:21:46,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:21:54,974 WARN L233 SmtUtils]: Spent 7.15s on a formula simplification. DAG size of input: 93 DAG size of output: 84 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 00:21:56,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:22:06,564 WARN L233 SmtUtils]: Spent 5.84s on a formula simplification. DAG size of input: 86 DAG size of output: 79 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 00:22:08,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:22:10,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:22:30,375 WARN L233 SmtUtils]: Spent 11.08s on a formula simplification. DAG size of input: 125 DAG size of output: 94 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 00:22:32,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:22:33,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:22:35,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:22:35,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:22:35,602 INFO L93 Difference]: Finished difference Result 119 states and 138 transitions. [2022-11-22 00:22:35,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-22 00:22:35,603 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 42 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-22 00:22:35,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:22:35,604 INFO L225 Difference]: With dead ends: 119 [2022-11-22 00:22:35,604 INFO L226 Difference]: Without dead ends: 119 [2022-11-22 00:22:35,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 152.5s TimeCoverageRelationStatistics Valid=680, Invalid=4404, Unknown=28, NotChecked=0, Total=5112 [2022-11-22 00:22:35,606 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 232 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 27 mSolverCounterUnsat, 26 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 26 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:22:35,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 77 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 498 Invalid, 26 Unknown, 0 Unchecked, 44.1s Time] [2022-11-22 00:22:35,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-22 00:22:35,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 50. [2022-11-22 00:22:35,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 49 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:22:35,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2022-11-22 00:22:35,613 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 23 [2022-11-22 00:22:35,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:22:35,613 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2022-11-22 00:22:35,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 42 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:22:35,614 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2022-11-22 00:22:35,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-22 00:22:35,615 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:22:35,615 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1] [2022-11-22 00:22:35,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-22 00:22:35,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-22 00:22:35,822 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 00:22:35,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:22:35,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1331285998, now seen corresponding path program 1 times [2022-11-22 00:22:35,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:22:35,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529737953] [2022-11-22 00:22:35,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:22:35,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:22:35,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:22:36,011 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:22:36,011 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:22:36,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529737953] [2022-11-22 00:22:36,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529737953] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:22:36,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251340949] [2022-11-22 00:22:36,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:22:36,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:22:36,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:22:36,014 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:22:36,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 00:22:36,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:22:36,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-22 00:22:36,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:22:36,174 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 6 treesize of output 5 [2022-11-22 00:22:36,394 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 15 treesize of output 7 [2022-11-22 00:22:36,398 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:22:36,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:22:36,500 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:22:36,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251340949] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:22:36,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1851787058] [2022-11-22 00:22:36,502 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 00:22:36,503 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:22:36,503 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:22:36,503 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:22:36,503 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:22:36,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:22:36,548 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 00:22:36,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:22:36,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:22:36,623 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 25 treesize of output 24 [2022-11-22 00:22:37,690 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:22:39,347 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1977#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-22 00:22:39,348 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:22:39,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:22:39,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 20 [2022-11-22 00:22:39,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428894830] [2022-11-22 00:22:39,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:22:39,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-22 00:22:39,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:22:39,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-22 00:22:39,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2022-11-22 00:22:39,350 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:22:39,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:22:39,777 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2022-11-22 00:22:39,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-22 00:22:39,778 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-22 00:22:39,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:22:39,779 INFO L225 Difference]: With dead ends: 71 [2022-11-22 00:22:39,779 INFO L226 Difference]: Without dead ends: 71 [2022-11-22 00:22:39,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=245, Invalid=1315, Unknown=0, NotChecked=0, Total=1560 [2022-11-22 00:22:39,781 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 48 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:22:39,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 46 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:22:39,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-22 00:22:39,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 66. [2022-11-22 00:22:39,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 65 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:22:39,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2022-11-22 00:22:39,787 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 27 [2022-11-22 00:22:39,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:22:39,788 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2022-11-22 00:22:39,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:22:39,788 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2022-11-22 00:22:39,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-22 00:22:39,789 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:22:39,789 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1] [2022-11-22 00:22:39,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 00:22:39,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-22 00:22:39,996 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 00:22:39,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:22:39,996 INFO L85 PathProgramCache]: Analyzing trace with hash 328493494, now seen corresponding path program 3 times [2022-11-22 00:22:39,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:22:39,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974490678] [2022-11-22 00:22:39,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:22:39,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:22:40,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:22:41,241 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:22:41,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:22:41,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974490678] [2022-11-22 00:22:41,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974490678] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:22:41,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195431314] [2022-11-22 00:22:41,242 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 00:22:41,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:22:41,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:22:41,244 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:22:41,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 00:22:41,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 00:22:41,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:22:41,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-22 00:22:41,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:22:41,397 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 00:22:41,445 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 00:22:41,540 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 17 treesize of output 19 [2022-11-22 00:22:43,716 INFO L321 Elim1Store]: treesize reduction 12, result has 72.7 percent of original size [2022-11-22 00:22:43,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 50 [2022-11-22 00:22:44,253 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:22:44,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:22:46,951 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:22:46,952 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 58 [2022-11-22 00:22:46,987 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:22:46,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 108 treesize of output 127 [2022-11-22 00:22:47,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 29 [2022-11-22 00:22:47,029 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 00:22:47,230 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:22:47,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195431314] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:22:47,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [531801362] [2022-11-22 00:22:47,232 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 00:22:47,232 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:22:47,233 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:22:47,233 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:22:47,233 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:22:47,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:22:47,257 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 00:22:47,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:22:47,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:22:47,334 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 25 treesize of output 24 [2022-11-22 00:22:47,709 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:22:50,001 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2375#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-22 00:22:50,001 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:22:50,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:22:50,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20, 20] total 55 [2022-11-22 00:22:50,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866791326] [2022-11-22 00:22:50,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:22:50,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-22 00:22:50,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:22:50,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-22 00:22:50,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=3877, Unknown=1, NotChecked=0, Total=4160 [2022-11-22 00:22:50,005 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand has 57 states, 56 states have (on average 1.5535714285714286) internal successors, (87), 56 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:23:00,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:23:00,939 INFO L93 Difference]: Finished difference Result 136 states and 154 transitions. [2022-11-22 00:23:00,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-22 00:23:00,940 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 1.5535714285714286) internal successors, (87), 56 states have internal predecessors, (87), 0 states have call successors, (0), 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 29 [2022-11-22 00:23:00,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:23:00,941 INFO L225 Difference]: With dead ends: 136 [2022-11-22 00:23:00,941 INFO L226 Difference]: Without dead ends: 136 [2022-11-22 00:23:00,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1725 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=1114, Invalid=9597, Unknown=1, NotChecked=0, Total=10712 [2022-11-22 00:23:00,945 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 379 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-22 00:23:00,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 180 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 966 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-22 00:23:00,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-11-22 00:23:00,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 130. [2022-11-22 00:23:00,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.1395348837209303) internal successors, (147), 129 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:23:00,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 147 transitions. [2022-11-22 00:23:00,954 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 147 transitions. Word has length 29 [2022-11-22 00:23:00,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:23:00,955 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 147 transitions. [2022-11-22 00:23:00,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 1.5535714285714286) internal successors, (87), 56 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:23:00,955 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 147 transitions. [2022-11-22 00:23:00,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-22 00:23:00,957 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:23:00,957 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1] [2022-11-22 00:23:00,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 00:23:01,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-22 00:23:01,165 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 00:23:01,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:23:01,166 INFO L85 PathProgramCache]: Analyzing trace with hash 2108199502, now seen corresponding path program 4 times [2022-11-22 00:23:01,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:23:01,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677917297] [2022-11-22 00:23:01,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:23:01,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:23:01,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:23:02,703 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 127 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:23:02,703 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:23:02,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677917297] [2022-11-22 00:23:02,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677917297] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:23:02,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859532300] [2022-11-22 00:23:02,703 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 00:23:02,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:23:02,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:23:02,710 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:23:02,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 00:23:02,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:23:02,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 161 conjunts are in the unsatisfiable core [2022-11-22 00:23:02,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:23:02,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:23:02,990 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 00:23:02,990 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 16 treesize of output 22 [2022-11-22 00:23:02,998 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 00:23:08,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:23:08,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:23:08,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:23:08,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:23:08,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:23:08,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:23:08,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:23:08,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:23:08,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:23:08,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:23:08,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:23:08,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:23:08,115 INFO L321 Elim1Store]: treesize reduction 44, result has 49.4 percent of original size [2022-11-22 00:23:08,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 17 case distinctions, treesize of input 84 treesize of output 80 [2022-11-22 00:23:08,122 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-22 00:23:08,133 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2022-11-22 00:23:08,599 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:23:08,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:23:16,359 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:23:16,359 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 185 treesize of output 108 [2022-11-22 00:23:16,415 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:23:16,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 28 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 8 case distinctions, treesize of input 212 treesize of output 223 [2022-11-22 00:23:16,489 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:23:16,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 28 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 8 case distinctions, treesize of input 105 treesize of output 147 [2022-11-22 00:23:16,557 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 00:23:16,687 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2022-11-22 00:23:17,019 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:23:17,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859532300] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:23:17,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [812096471] [2022-11-22 00:23:17,021 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 00:23:17,021 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:23:17,021 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:23:17,021 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:23:17,021 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:23:17,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:23:17,048 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 00:23:17,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:23:17,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:23:17,116 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 25 treesize of output 24 [2022-11-22 00:23:17,528 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:23:20,652 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3136#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-22 00:23:20,652 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:23:20,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:23:20,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 38, 38] total 95 [2022-11-22 00:23:20,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262855444] [2022-11-22 00:23:20,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:23:20,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-11-22 00:23:20,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:23:20,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-11-22 00:23:20,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=680, Invalid=10240, Unknown=0, NotChecked=0, Total=10920 [2022-11-22 00:23:20,657 INFO L87 Difference]: Start difference. First operand 130 states and 147 transitions. Second operand has 97 states, 96 states have (on average 1.65625) internal successors, (159), 96 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:23:31,424 WARN L233 SmtUtils]: Spent 6.74s on a formula simplification. DAG size of input: 102 DAG size of output: 84 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 00:23:57,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:23:57,706 INFO L93 Difference]: Finished difference Result 145 states and 161 transitions. [2022-11-22 00:23:57,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-22 00:23:57,710 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 96 states have (on average 1.65625) internal successors, (159), 96 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-11-22 00:23:57,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:23:57,710 INFO L225 Difference]: With dead ends: 145 [2022-11-22 00:23:57,710 INFO L226 Difference]: Without dead ends: 0 [2022-11-22 00:23:57,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4711 ImplicationChecksByTransitivity, 47.6s TimeCoverageRelationStatistics Valid=3268, Invalid=25462, Unknown=0, NotChecked=0, Total=28730 [2022-11-22 00:23:57,715 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 838 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 2609 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 838 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 2808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 2609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-22 00:23:57,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [838 Valid, 524 Invalid, 2808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 2609 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-22 00:23:57,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-22 00:23:57,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-22 00:23:57,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:23:57,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-22 00:23:57,716 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 53 [2022-11-22 00:23:57,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:23:57,716 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-22 00:23:57,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 96 states have (on average 1.65625) internal successors, (159), 96 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:23:57,717 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-22 00:23:57,717 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-22 00:23:57,719 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 9 remaining) [2022-11-22 00:23:57,720 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 9 remaining) [2022-11-22 00:23:57,720 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2022-11-22 00:23:57,720 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2022-11-22 00:23:57,720 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 9 remaining) [2022-11-22 00:23:57,720 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 9 remaining) [2022-11-22 00:23:57,720 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 9 remaining) [2022-11-22 00:23:57,720 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 9 remaining) [2022-11-22 00:23:57,721 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2022-11-22 00:23:57,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 00:23:57,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:23:57,924 INFO L444 BasicCegarLoop]: Path program histogram: [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:23:57,926 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-22 00:23:57,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 12:23:57 BoogieIcfgContainer [2022-11-22 00:23:57,929 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-22 00:23:57,930 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-22 00:23:57,930 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-22 00:23:57,930 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-22 00:23:57,930 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:18:40" (3/4) ... [2022-11-22 00:23:57,934 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-22 00:23:57,955 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2022-11-22 00:23:57,955 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2022-11-22 00:23:57,955 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-22 00:23:57,956 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-22 00:23:57,989 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/witness.graphml [2022-11-22 00:23:57,989 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-22 00:23:57,990 INFO L158 Benchmark]: Toolchain (without parser) took 319020.84ms. Allocated memory was 144.7MB in the beginning and 222.3MB in the end (delta: 77.6MB). Free memory was 108.9MB in the beginning and 147.9MB in the end (delta: -39.0MB). Peak memory consumption was 40.7MB. Max. memory is 16.1GB. [2022-11-22 00:23:57,990 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 144.7MB. Free memory is still 114.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-22 00:23:57,990 INFO L158 Benchmark]: CACSL2BoogieTranslator took 492.96ms. Allocated memory is still 144.7MB. Free memory was 108.4MB in the beginning and 92.9MB in the end (delta: 15.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-22 00:23:57,991 INFO L158 Benchmark]: Boogie Procedure Inliner took 70.86ms. Allocated memory is still 144.7MB. Free memory was 92.9MB in the beginning and 90.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-22 00:23:57,991 INFO L158 Benchmark]: Boogie Preprocessor took 40.46ms. Allocated memory is still 144.7MB. Free memory was 90.8MB in the beginning and 89.6MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-22 00:23:57,991 INFO L158 Benchmark]: RCFGBuilder took 493.48ms. Allocated memory is still 144.7MB. Free memory was 89.6MB in the beginning and 74.0MB in the end (delta: 15.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-22 00:23:57,992 INFO L158 Benchmark]: TraceAbstraction took 317856.09ms. Allocated memory was 144.7MB in the beginning and 222.3MB in the end (delta: 77.6MB). Free memory was 73.2MB in the beginning and 150.6MB in the end (delta: -77.4MB). Peak memory consumption was 2.9MB. Max. memory is 16.1GB. [2022-11-22 00:23:57,992 INFO L158 Benchmark]: Witness Printer took 59.70ms. Allocated memory is still 222.3MB. Free memory was 150.6MB in the beginning and 147.9MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-22 00:23:57,993 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 144.7MB. Free memory is still 114.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 492.96ms. Allocated memory is still 144.7MB. Free memory was 108.4MB in the beginning and 92.9MB in the end (delta: 15.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 70.86ms. Allocated memory is still 144.7MB. Free memory was 92.9MB in the beginning and 90.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 40.46ms. Allocated memory is still 144.7MB. Free memory was 90.8MB in the beginning and 89.6MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 493.48ms. Allocated memory is still 144.7MB. Free memory was 89.6MB in the beginning and 74.0MB in the end (delta: 15.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 317856.09ms. Allocated memory was 144.7MB in the beginning and 222.3MB in the end (delta: 77.6MB). Free memory was 73.2MB in the beginning and 150.6MB in the end (delta: -77.4MB). Peak memory consumption was 2.9MB. Max. memory is 16.1GB. * Witness Printer took 59.70ms. Allocated memory is still 222.3MB. Free memory was 150.6MB in the beginning and 147.9MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 561]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 9 error locations. Started 1 CEGAR loops. OverallTime: 317.8s, OverallIterations: 17, TraceHistogramMax: 9, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 238.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 26 mSolverCounterUnknown, 2452 SdHoareTripleChecker+Valid, 51.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2452 mSDsluCounter, 1069 SdHoareTripleChecker+Invalid, 50.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 948 mSDsCounter, 363 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5500 IncrementalHoareTripleChecker+Invalid, 5889 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 363 mSolverCounterUnsat, 121 mSDtfsCounter, 5500 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 884 GetRequests, 254 SyntacticMatches, 2 SemanticMatches, 628 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10165 ImplicationChecksByTransitivity, 242.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=130occurred in iteration=16, InterpolantAutomatonStates: 269, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 105 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 52.1s InterpolantComputationTime, 416 NumberOfCodeBlocks, 416 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 569 ConstructedInterpolants, 116 QuantifiedInterpolants, 15981 SizeOfPredicates, 202 NumberOfNonLiveVariables, 1608 ConjunctsInSsa, 584 ConjunctsInUnsatCore, 33 InterpolantComputations, 9 PerfectInterpolantSequences, 213/954 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 9 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-11-22 00:23:58,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5820cc34-d537-4fab-8f84-3cb0f42c5e41/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE