./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-memory-alloca/subseq-alloca-1.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2128b4a-5f81-46e4-aa13-874db1f48b7e/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2128b4a-5f81-46e4-aa13-874db1f48b7e/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2128b4a-5f81-46e4-aa13-874db1f48b7e/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2128b4a-5f81-46e4-aa13-874db1f48b7e/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-memory-alloca/subseq-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2128b4a-5f81-46e4-aa13-874db1f48b7e/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2128b4a-5f81-46e4-aa13-874db1f48b7e/bin/utaipan-gh47qXpMRh --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 ae37599e398d4579dc13aa902332f9c984a4acd0674bb835a0d1e4887393314e --- 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-2329fc7 [2022-12-14 06:08:36,928 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 06:08:36,930 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 06:08:36,954 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 06:08:36,954 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 06:08:36,956 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 06:08:36,957 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 06:08:36,960 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 06:08:36,962 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 06:08:36,963 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 06:08:36,964 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 06:08:36,965 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 06:08:36,965 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 06:08:36,966 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 06:08:36,968 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 06:08:36,970 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 06:08:36,971 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 06:08:36,972 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 06:08:36,975 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 06:08:36,977 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 06:08:36,978 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 06:08:36,979 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 06:08:36,979 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 06:08:36,980 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 06:08:36,984 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 06:08:36,984 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 06:08:36,985 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 06:08:36,985 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 06:08:36,985 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 06:08:36,986 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 06:08:36,986 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 06:08:36,987 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 06:08:36,987 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 06:08:36,988 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 06:08:36,988 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 06:08:36,988 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 06:08:36,989 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 06:08:36,989 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 06:08:36,989 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 06:08:36,989 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 06:08:36,990 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 06:08:36,991 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2128b4a-5f81-46e4-aa13-874db1f48b7e/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2022-12-14 06:08:37,006 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 06:08:37,006 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 06:08:37,006 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 06:08:37,012 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 06:08:37,013 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 06:08:37,013 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 06:08:37,013 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 06:08:37,013 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 06:08:37,014 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 06:08:37,014 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 06:08:37,014 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 06:08:37,014 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 06:08:37,014 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 06:08:37,014 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 06:08:37,015 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 06:08:37,015 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 06:08:37,015 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 06:08:37,015 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 06:08:37,016 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 06:08:37,016 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 06:08:37,016 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 06:08:37,016 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 06:08:37,017 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 06:08:37,017 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 06:08:37,017 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 06:08:37,017 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 06:08:37,017 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 06:08:37,017 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 06:08:37,018 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 06:08:37,018 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 06:08:37,018 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 06:08:37,018 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 06:08:37,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:08:37,019 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 06:08:37,019 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 06:08:37,019 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 06:08:37,019 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 06:08:37,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 06:08:37,019 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 06:08:37,020 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_a2128b4a-5f81-46e4-aa13-874db1f48b7e/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2128b4a-5f81-46e4-aa13-874db1f48b7e/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ae37599e398d4579dc13aa902332f9c984a4acd0674bb835a0d1e4887393314e [2022-12-14 06:08:37,187 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 06:08:37,203 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 06:08:37,205 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 06:08:37,206 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 06:08:37,206 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 06:08:37,207 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2128b4a-5f81-46e4-aa13-874db1f48b7e/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/termination-memory-alloca/subseq-alloca-1.i [2022-12-14 06:08:39,793 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 06:08:39,935 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 06:08:39,936 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2128b4a-5f81-46e4-aa13-874db1f48b7e/sv-benchmarks/c/termination-memory-alloca/subseq-alloca-1.i [2022-12-14 06:08:39,943 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2128b4a-5f81-46e4-aa13-874db1f48b7e/bin/utaipan-gh47qXpMRh/data/0eacc3687/4e288c9ce1c3453ea7eb8f539c9ec22a/FLAG2611bb385 [2022-12-14 06:08:39,954 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2128b4a-5f81-46e4-aa13-874db1f48b7e/bin/utaipan-gh47qXpMRh/data/0eacc3687/4e288c9ce1c3453ea7eb8f539c9ec22a [2022-12-14 06:08:39,956 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 06:08:39,957 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 06:08:39,958 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 06:08:39,958 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 06:08:39,961 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 06:08:39,961 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:08:39" (1/1) ... [2022-12-14 06:08:39,962 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77750fd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:08:39, skipping insertion in model container [2022-12-14 06:08:39,962 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:08:39" (1/1) ... [2022-12-14 06:08:39,968 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 06:08:39,987 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 06:08:40,156 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:08:40,163 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 06:08:40,187 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:08:40,202 INFO L208 MainTranslator]: Completed translation [2022-12-14 06:08:40,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:08:40 WrapperNode [2022-12-14 06:08:40,203 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 06:08:40,203 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 06:08:40,203 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 06:08:40,203 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 06:08:40,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:08:40" (1/1) ... [2022-12-14 06:08:40,217 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:08:40" (1/1) ... [2022-12-14 06:08:40,230 INFO L138 Inliner]: procedures = 111, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 74 [2022-12-14 06:08:40,231 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 06:08:40,231 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 06:08:40,231 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 06:08:40,231 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 06:08:40,237 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:08:40" (1/1) ... [2022-12-14 06:08:40,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:08:40" (1/1) ... [2022-12-14 06:08:40,239 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:08:40" (1/1) ... [2022-12-14 06:08:40,239 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:08:40" (1/1) ... [2022-12-14 06:08:40,242 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:08:40" (1/1) ... [2022-12-14 06:08:40,245 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:08:40" (1/1) ... [2022-12-14 06:08:40,245 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:08:40" (1/1) ... [2022-12-14 06:08:40,246 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:08:40" (1/1) ... [2022-12-14 06:08:40,247 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 06:08:40,248 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 06:08:40,248 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 06:08:40,248 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 06:08:40,249 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:08:40" (1/1) ... [2022-12-14 06:08:40,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:08:40,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2128b4a-5f81-46e4-aa13-874db1f48b7e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:08:40,270 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2128b4a-5f81-46e4-aa13-874db1f48b7e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 06:08:40,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2128b4a-5f81-46e4-aa13-874db1f48b7e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 06:08:40,296 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 06:08:40,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 06:08:40,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 06:08:40,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 06:08:40,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 06:08:40,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 06:08:40,370 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 06:08:40,372 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 06:08:40,499 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 06:08:40,563 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 06:08:40,564 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 06:08:40,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:08:40 BoogieIcfgContainer [2022-12-14 06:08:40,566 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 06:08:40,568 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 06:08:40,568 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 06:08:40,570 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 06:08:40,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 06:08:39" (1/3) ... [2022-12-14 06:08:40,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23752629 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:08:40, skipping insertion in model container [2022-12-14 06:08:40,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:08:40" (2/3) ... [2022-12-14 06:08:40,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23752629 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:08:40, skipping insertion in model container [2022-12-14 06:08:40,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:08:40" (3/3) ... [2022-12-14 06:08:40,572 INFO L112 eAbstractionObserver]: Analyzing ICFG subseq-alloca-1.i [2022-12-14 06:08:40,586 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 06:08:40,587 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2022-12-14 06:08:40,626 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 06:08:40,630 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;@36f7e3d2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 06:08:40,630 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2022-12-14 06:08:40,633 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 26 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:08:40,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 06:08:40,638 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:08:40,638 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 06:08:40,638 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 06:08:40,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:08:40,642 INFO L85 PathProgramCache]: Analyzing trace with hash 3799, now seen corresponding path program 1 times [2022-12-14 06:08:40,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:08:40,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696325796] [2022-12-14 06:08:40,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:08:40,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:08:40,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:08:40,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:08:40,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:08:40,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696325796] [2022-12-14 06:08:40,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696325796] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:08:40,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:08:40,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 06:08:40,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255297383] [2022-12-14 06:08:40,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:08:40,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:08:40,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:08:40,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:08:40,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:08:40,891 INFO L87 Difference]: Start difference. First operand has 27 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 26 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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) [2022-12-14 06:08:40,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:08:40,933 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2022-12-14 06:08:40,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:08:40,935 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 [2022-12-14 06:08:40,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:08:40,940 INFO L225 Difference]: With dead ends: 26 [2022-12-14 06:08:40,940 INFO L226 Difference]: Without dead ends: 25 [2022-12-14 06:08:40,942 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 [2022-12-14 06:08:40,944 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:08:40,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 11 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:08:40,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-12-14 06:08:40,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-12-14 06:08:40,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 24 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) [2022-12-14 06:08:40,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-12-14 06:08:40,965 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 2 [2022-12-14 06:08:40,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:08:40,965 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-12-14 06:08:40,966 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) [2022-12-14 06:08:40,966 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-12-14 06:08:40,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 06:08:40,966 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:08:40,966 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 06:08:40,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 06:08:40,967 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 06:08:40,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:08:40,968 INFO L85 PathProgramCache]: Analyzing trace with hash 3800, now seen corresponding path program 1 times [2022-12-14 06:08:40,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:08:40,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108173384] [2022-12-14 06:08:40,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:08:40,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:08:40,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:08:41,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:08:41,147 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:08:41,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108173384] [2022-12-14 06:08:41,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108173384] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:08:41,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:08:41,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 06:08:41,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857499588] [2022-12-14 06:08:41,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:08:41,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:08:41,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:08:41,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:08:41,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:08:41,150 INFO L87 Difference]: Start difference. First operand 25 states and 26 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) [2022-12-14 06:08:41,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:08:41,181 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2022-12-14 06:08:41,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:08:41,181 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 [2022-12-14 06:08:41,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:08:41,181 INFO L225 Difference]: With dead ends: 24 [2022-12-14 06:08:41,181 INFO L226 Difference]: Without dead ends: 24 [2022-12-14 06:08:41,182 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 [2022-12-14 06:08:41,183 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 24 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:08:41,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 11 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:08:41,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-12-14 06:08:41,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-12-14 06:08:41,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 11 states have (on average 2.272727272727273) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:08:41,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-12-14 06:08:41,185 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 2 [2022-12-14 06:08:41,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:08:41,185 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-12-14 06:08:41,186 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) [2022-12-14 06:08:41,186 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-12-14 06:08:41,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 06:08:41,186 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:08:41,186 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 06:08:41,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 06:08:41,186 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 06:08:41,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:08:41,187 INFO L85 PathProgramCache]: Analyzing trace with hash 117758, now seen corresponding path program 1 times [2022-12-14 06:08:41,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:08:41,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651692474] [2022-12-14 06:08:41,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:08:41,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:08:41,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:08:41,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:08:41,220 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:08:41,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651692474] [2022-12-14 06:08:41,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651692474] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:08:41,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:08:41,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 06:08:41,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472037640] [2022-12-14 06:08:41,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:08:41,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:08:41,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:08:41,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:08:41,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:08:41,222 INFO L87 Difference]: Start difference. First operand 24 states and 25 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) [2022-12-14 06:08:41,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:08:41,246 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2022-12-14 06:08:41,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:08:41,246 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 [2022-12-14 06:08:41,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:08:41,246 INFO L225 Difference]: With dead ends: 23 [2022-12-14 06:08:41,246 INFO L226 Difference]: Without dead ends: 23 [2022-12-14 06:08:41,247 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 [2022-12-14 06:08:41,247 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 20 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:08:41,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 10 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:08:41,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-12-14 06:08:41,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-12-14 06:08:41,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 22 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) [2022-12-14 06:08:41,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2022-12-14 06:08:41,250 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 3 [2022-12-14 06:08:41,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:08:41,250 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2022-12-14 06:08:41,250 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) [2022-12-14 06:08:41,250 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2022-12-14 06:08:41,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 06:08:41,251 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:08:41,251 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 06:08:41,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 06:08:41,251 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 06:08:41,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:08:41,251 INFO L85 PathProgramCache]: Analyzing trace with hash 117759, now seen corresponding path program 1 times [2022-12-14 06:08:41,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:08:41,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339684197] [2022-12-14 06:08:41,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:08:41,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:08:41,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:08:41,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:08:41,361 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:08:41,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339684197] [2022-12-14 06:08:41,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339684197] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:08:41,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:08:41,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 06:08:41,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346704850] [2022-12-14 06:08:41,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:08:41,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:08:41,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:08:41,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:08:41,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:08:41,363 INFO L87 Difference]: Start difference. First operand 23 states and 24 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) [2022-12-14 06:08:41,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:08:41,390 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2022-12-14 06:08:41,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:08:41,391 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 [2022-12-14 06:08:41,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:08:41,392 INFO L225 Difference]: With dead ends: 22 [2022-12-14 06:08:41,392 INFO L226 Difference]: Without dead ends: 22 [2022-12-14 06:08:41,392 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 [2022-12-14 06:08:41,393 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 21 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:08:41,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 10 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:08:41,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-12-14 06:08:41,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-12-14 06:08:41,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 11 states have (on average 2.090909090909091) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:08:41,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-12-14 06:08:41,395 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 3 [2022-12-14 06:08:41,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:08:41,395 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-12-14 06:08:41,395 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) [2022-12-14 06:08:41,395 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-12-14 06:08:41,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 06:08:41,396 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:08:41,396 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 06:08:41,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 06:08:41,396 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 06:08:41,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:08:41,396 INFO L85 PathProgramCache]: Analyzing trace with hash 3652262, now seen corresponding path program 1 times [2022-12-14 06:08:41,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:08:41,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730998803] [2022-12-14 06:08:41,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:08:41,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:08:41,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:08:41,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:08:41,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:08:41,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730998803] [2022-12-14 06:08:41,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730998803] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:08:41,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:08:41,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:08:41,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088493485] [2022-12-14 06:08:41,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:08:41,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:08:41,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:08:41,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:08:41,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:08:41,439 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:08:41,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:08:41,476 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2022-12-14 06:08:41,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:08:41,476 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 06:08:41,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:08:41,476 INFO L225 Difference]: With dead ends: 20 [2022-12-14 06:08:41,477 INFO L226 Difference]: Without dead ends: 20 [2022-12-14 06:08:41,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:08:41,477 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 32 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:08:41,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 8 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:08:41,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-12-14 06:08:41,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-12-14 06:08:41,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:08:41,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-12-14 06:08:41,480 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 4 [2022-12-14 06:08:41,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:08:41,480 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-12-14 06:08:41,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:08:41,480 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-12-14 06:08:41,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 06:08:41,480 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:08:41,480 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 06:08:41,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 06:08:41,480 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 06:08:41,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:08:41,481 INFO L85 PathProgramCache]: Analyzing trace with hash 3652263, now seen corresponding path program 1 times [2022-12-14 06:08:41,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:08:41,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874766823] [2022-12-14 06:08:41,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:08:41,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:08:41,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:08:41,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:08:41,553 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:08:41,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874766823] [2022-12-14 06:08:41,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874766823] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:08:41,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:08:41,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:08:41,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195129943] [2022-12-14 06:08:41,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:08:41,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:08:41,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:08:41,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:08:41,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:08:41,555 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:08:41,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:08:41,604 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2022-12-14 06:08:41,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:08:41,605 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 06:08:41,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:08:41,605 INFO L225 Difference]: With dead ends: 35 [2022-12-14 06:08:41,605 INFO L226 Difference]: Without dead ends: 35 [2022-12-14 06:08:41,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:08:41,606 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 50 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:08:41,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 16 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:08:41,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-12-14 06:08:41,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2022-12-14 06:08:41,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.875) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:08:41,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2022-12-14 06:08:41,609 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 4 [2022-12-14 06:08:41,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:08:41,609 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2022-12-14 06:08:41,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:08:41,609 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2022-12-14 06:08:41,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 06:08:41,610 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:08:41,610 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 06:08:41,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 06:08:41,610 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 06:08:41,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:08:41,610 INFO L85 PathProgramCache]: Analyzing trace with hash -785095367, now seen corresponding path program 1 times [2022-12-14 06:08:41,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:08:41,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848030770] [2022-12-14 06:08:41,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:08:41,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:08:41,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:08:41,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:08:41,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:08:41,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848030770] [2022-12-14 06:08:41,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848030770] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:08:41,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:08:41,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 06:08:41,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922335800] [2022-12-14 06:08:41,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:08:41,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:08:41,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:08:41,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:08:41,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:08:41,644 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:08:41,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:08:41,666 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2022-12-14 06:08:41,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:08:41,666 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 06:08:41,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:08:41,667 INFO L225 Difference]: With dead ends: 22 [2022-12-14 06:08:41,667 INFO L226 Difference]: Without dead ends: 22 [2022-12-14 06:08:41,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:08:41,668 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 10 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:08:41,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 8 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:08:41,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-12-14 06:08:41,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-12-14 06:08:41,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.625) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:08:41,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-12-14 06:08:41,671 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 6 [2022-12-14 06:08:41,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:08:41,671 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-12-14 06:08:41,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:08:41,672 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-12-14 06:08:41,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 06:08:41,672 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:08:41,672 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 06:08:41,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 06:08:41,673 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 06:08:41,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:08:41,673 INFO L85 PathProgramCache]: Analyzing trace with hash -785095366, now seen corresponding path program 1 times [2022-12-14 06:08:41,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:08:41,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687279716] [2022-12-14 06:08:41,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:08:41,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:08:41,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:08:41,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:08:41,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:08:41,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687279716] [2022-12-14 06:08:41,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687279716] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:08:41,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:08:41,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 06:08:41,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021678204] [2022-12-14 06:08:41,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:08:41,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:08:41,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:08:41,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:08:41,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:08:41,789 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:08:41,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:08:41,824 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-12-14 06:08:41,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:08:41,824 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 06:08:41,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:08:41,825 INFO L225 Difference]: With dead ends: 26 [2022-12-14 06:08:41,825 INFO L226 Difference]: Without dead ends: 26 [2022-12-14 06:08:41,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:08:41,826 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 33 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:08:41,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 16 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:08:41,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-12-14 06:08:41,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2022-12-14 06:08:41,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.5) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:08:41,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-12-14 06:08:41,829 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 6 [2022-12-14 06:08:41,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:08:41,829 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-12-14 06:08:41,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:08:41,829 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-12-14 06:08:41,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 06:08:41,830 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:08:41,830 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:08:41,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 06:08:41,830 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 06:08:41,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:08:41,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1437785582, now seen corresponding path program 1 times [2022-12-14 06:08:41,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:08:41,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011876820] [2022-12-14 06:08:41,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:08:41,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:08:41,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:08:41,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:08:41,959 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:08:41,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011876820] [2022-12-14 06:08:41,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011876820] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:08:41,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:08:41,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 06:08:41,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053304402] [2022-12-14 06:08:41,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:08:41,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:08:41,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:08:41,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:08:41,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:08:41,961 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:08:41,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:08:41,981 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2022-12-14 06:08:41,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:08:41,982 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 06:08:41,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:08:41,982 INFO L225 Difference]: With dead ends: 23 [2022-12-14 06:08:41,982 INFO L226 Difference]: Without dead ends: 21 [2022-12-14 06:08:41,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:08:41,983 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 10 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:08:41,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 18 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:08:41,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-12-14 06:08:41,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-12-14 06:08:41,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:08:41,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-12-14 06:08:41,986 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 8 [2022-12-14 06:08:41,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:08:41,986 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-12-14 06:08:41,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:08:41,986 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-12-14 06:08:41,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 06:08:41,986 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:08:41,987 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:08:41,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 06:08:41,987 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 06:08:41,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:08:41,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1621701563, now seen corresponding path program 1 times [2022-12-14 06:08:41,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:08:41,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204471848] [2022-12-14 06:08:41,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:08:41,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:08:41,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:08:42,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:08:42,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:08:42,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204471848] [2022-12-14 06:08:42,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204471848] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:08:42,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:08:42,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:08:42,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824834141] [2022-12-14 06:08:42,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:08:42,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:08:42,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:08:42,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:08:42,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:08:42,015 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:08:42,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:08:42,030 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2022-12-14 06:08:42,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:08:42,031 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-12-14 06:08:42,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:08:42,031 INFO L225 Difference]: With dead ends: 23 [2022-12-14 06:08:42,031 INFO L226 Difference]: Without dead ends: 22 [2022-12-14 06:08:42,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:08:42,032 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:08:42,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:08:42,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-12-14 06:08:42,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-12-14 06:08:42,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:08:42,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-12-14 06:08:42,035 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 9 [2022-12-14 06:08:42,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:08:42,035 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-12-14 06:08:42,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:08:42,035 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-12-14 06:08:42,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 06:08:42,036 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:08:42,036 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:08:42,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 06:08:42,036 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 06:08:42,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:08:42,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1407297936, now seen corresponding path program 1 times [2022-12-14 06:08:42,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:08:42,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126507111] [2022-12-14 06:08:42,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:08:42,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:08:42,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:08:42,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:08:42,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:08:42,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126507111] [2022-12-14 06:08:42,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126507111] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:08:42,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45454602] [2022-12-14 06:08:42,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:08:42,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:08:42,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2128b4a-5f81-46e4-aa13-874db1f48b7e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:08:42,412 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2128b4a-5f81-46e4-aa13-874db1f48b7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:08:42,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2128b4a-5f81-46e4-aa13-874db1f48b7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 06:08:42,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:08:42,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-14 06:08:42,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:08:42,522 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 [2022-12-14 06:08:42,544 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 [2022-12-14 06:08:42,592 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 16 treesize of output 18 [2022-12-14 06:08:42,821 INFO L321 Elim1Store]: treesize reduction 4, result has 88.6 percent of original size [2022-12-14 06:08:42,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 66 [2022-12-14 06:08:42,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:08:42,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:08:43,083 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:08:43,084 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 [2022-12-14 06:08:43,094 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:08:43,094 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 [2022-12-14 06:08:43,098 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 [2022-12-14 06:08:43,105 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 24 treesize of output 20 [2022-12-14 06:08:43,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:08:43,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45454602] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:08:43,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1540330231] [2022-12-14 06:08:43,152 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 06:08:43,152 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:08:43,156 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:08:43,162 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:08:43,162 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:08:43,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:08:43,215 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 [2022-12-14 06:08:43,237 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 [2022-12-14 06:08:43,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:08:43,273 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 [2022-12-14 06:08:43,678 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:08:44,652 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '614#(and (<= 0 |ULTIMATE.start_subseq_~pt~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_subseq_#in~t#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_subseq_~s#1.offset|) (<= |ULTIMATE.start_subseq_#in~t#1.offset| 0) (< (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1)) (<= 0 |ULTIMATE.start_subseq_~t#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 0 |ULTIMATE.start_subseq_~s#1.base|) (<= 0 |ULTIMATE.start_subseq_~pt~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_subseq_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_subseq_~t#1.offset|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= |ULTIMATE.start_subseq_~t#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_subseq_#in~s#1.base|) (<= |ULTIMATE.start_subseq_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_subseq_#in~s#1.offset|) (<= 0 |ULTIMATE.start_subseq_~ps~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_subseq_#in~t#1.base|))' at error location [2022-12-14 06:08:44,652 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:08:44,652 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:08:44,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-12-14 06:08:44,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674169775] [2022-12-14 06:08:44,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:08:44,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 06:08:44,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:08:44,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 06:08:44,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-12-14 06:08:44,654 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:08:45,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:08:45,148 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2022-12-14 06:08:45,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 06:08:45,149 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 06:08:45,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:08:45,150 INFO L225 Difference]: With dead ends: 35 [2022-12-14 06:08:45,150 INFO L226 Difference]: Without dead ends: 35 [2022-12-14 06:08:45,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=229, Invalid=893, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 06:08:45,151 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 68 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:08:45,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 14 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:08:45,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-12-14 06:08:45,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2022-12-14 06:08:45,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.375) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:08:45,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-12-14 06:08:45,155 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 10 [2022-12-14 06:08:45,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:08:45,155 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-12-14 06:08:45,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:08:45,155 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-12-14 06:08:45,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 06:08:45,156 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:08:45,156 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:08:45,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2128b4a-5f81-46e4-aa13-874db1f48b7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 06:08:45,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2128b4a-5f81-46e4-aa13-874db1f48b7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 06:08:45,358 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 06:08:45,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:08:45,359 INFO L85 PathProgramCache]: Analyzing trace with hash 501428931, now seen corresponding path program 1 times [2022-12-14 06:08:45,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:08:45,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477679003] [2022-12-14 06:08:45,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:08:45,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:08:45,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:08:45,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:08:45,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:08:45,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477679003] [2022-12-14 06:08:45,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477679003] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:08:45,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574230050] [2022-12-14 06:08:45,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:08:45,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:08:45,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2128b4a-5f81-46e4-aa13-874db1f48b7e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:08:45,625 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2128b4a-5f81-46e4-aa13-874db1f48b7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:08:45,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2128b4a-5f81-46e4-aa13-874db1f48b7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 06:08:45,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:08:45,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 06:08:45,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:08:45,701 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 [2022-12-14 06:08:45,765 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:08:45,765 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 32 treesize of output 29 [2022-12-14 06:08:45,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:08:45,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:08:45,949 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 [2022-12-14 06:08:45,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-12-14 06:08:45,959 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 31 treesize of output 23 [2022-12-14 06:08:45,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:08:45,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574230050] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:08:45,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1709985199] [2022-12-14 06:08:45,975 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 06:08:45,975 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:08:45,975 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:08:45,975 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:08:45,976 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:08:46,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:08:46,005 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 [2022-12-14 06:08:46,031 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 [2022-12-14 06:08:46,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:08:46,063 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 [2022-12-14 06:08:46,446 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:08:47,272 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '784#(and (<= 0 |ULTIMATE.start_subseq_~pt~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) |ULTIMATE.start_subseq_#t~mem2#1|) (<= 0 |ULTIMATE.start_subseq_#in~t#1.offset|) |ULTIMATE.start_subseq_#t~short4#1| (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_subseq_~s#1.offset|) (<= |ULTIMATE.start_subseq_#in~t#1.offset| 0) (<= 0 |ULTIMATE.start_subseq_~t#1.base|) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 0 |ULTIMATE.start_subseq_~s#1.base|) (<= 0 |ULTIMATE.start_subseq_~pt~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_subseq_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_subseq_~t#1.offset|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= |ULTIMATE.start_subseq_~t#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_subseq_#in~s#1.base|) (<= |ULTIMATE.start_subseq_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_subseq_#in~s#1.offset|) (<= 0 |ULTIMATE.start_subseq_~ps~0#1.base|) (< (select |#length| |ULTIMATE.start_subseq_~pt~0#1.base|) (+ |ULTIMATE.start_subseq_~pt~0#1.offset| 1)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (not (= |ULTIMATE.start_subseq_#t~mem2#1| 0)) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_subseq_#in~t#1.base|))' at error location [2022-12-14 06:08:47,272 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:08:47,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:08:47,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2022-12-14 06:08:47,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425324324] [2022-12-14 06:08:47,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:08:47,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 06:08:47,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:08:47,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 06:08:47,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-12-14 06:08:47,274 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:08:47,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:08:47,568 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2022-12-14 06:08:47,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 06:08:47,568 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 06:08:47,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:08:47,569 INFO L225 Difference]: With dead ends: 30 [2022-12-14 06:08:47,569 INFO L226 Difference]: Without dead ends: 27 [2022-12-14 06:08:47,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2022-12-14 06:08:47,570 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 47 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:08:47,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 23 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:08:47,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-12-14 06:08:47,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-12-14 06:08:47,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 24 states have (on average 1.125) internal successors, (27), 26 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:08:47,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2022-12-14 06:08:47,572 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 12 [2022-12-14 06:08:47,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:08:47,573 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2022-12-14 06:08:47,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:08:47,573 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2022-12-14 06:08:47,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 06:08:47,573 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:08:47,573 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2022-12-14 06:08:47,578 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2128b4a-5f81-46e4-aa13-874db1f48b7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 06:08:47,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2128b4a-5f81-46e4-aa13-874db1f48b7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:08:47,775 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 06:08:47,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:08:47,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1555690892, now seen corresponding path program 2 times [2022-12-14 06:08:47,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:08:47,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453660176] [2022-12-14 06:08:47,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:08:47,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:08:47,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:08:48,292 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:08:48,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:08:48,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453660176] [2022-12-14 06:08:48,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453660176] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:08:48,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835956752] [2022-12-14 06:08:48,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:08:48,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:08:48,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2128b4a-5f81-46e4-aa13-874db1f48b7e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:08:48,294 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2128b4a-5f81-46e4-aa13-874db1f48b7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:08:48,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2128b4a-5f81-46e4-aa13-874db1f48b7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 06:08:48,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 06:08:48,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:08:48,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-14 06:08:48,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:08:48,444 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 06:08:48,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 06:08:48,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:08:48,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:08:48,658 INFO L321 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2022-12-14 06:08:48,659 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 41 treesize of output 35 [2022-12-14 06:08:48,723 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:08:48,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:08:48,905 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 [2022-12-14 06:08:48,910 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 29 treesize of output 23 [2022-12-14 06:08:48,937 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:08:48,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835956752] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:08:48,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [603759782] [2022-12-14 06:08:48,939 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 06:08:48,939 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:08:48,939 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:08:48,939 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:08:48,939 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:08:48,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:08:48,964 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 [2022-12-14 06:08:48,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 06:08:49,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:08:49,023 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 [2022-12-14 06:08:49,347 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:08:50,309 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '989#(and (<= 0 |ULTIMATE.start_subseq_~pt~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) |ULTIMATE.start_subseq_#t~mem2#1|) (<= 0 |ULTIMATE.start_subseq_#in~t#1.offset|) |ULTIMATE.start_subseq_#t~short4#1| (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_subseq_~s#1.offset|) (<= |ULTIMATE.start_subseq_#in~t#1.offset| 0) (<= 0 |ULTIMATE.start_subseq_~t#1.base|) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 0 |ULTIMATE.start_subseq_~s#1.base|) (<= 0 |ULTIMATE.start_subseq_~pt~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_subseq_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_subseq_~t#1.offset|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= |ULTIMATE.start_subseq_~t#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_subseq_#in~s#1.base|) (<= |ULTIMATE.start_subseq_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_subseq_#in~s#1.offset|) (<= 0 |ULTIMATE.start_subseq_~ps~0#1.base|) (< (select |#length| |ULTIMATE.start_subseq_~pt~0#1.base|) (+ |ULTIMATE.start_subseq_~pt~0#1.offset| 1)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (not (= |ULTIMATE.start_subseq_#t~mem2#1| 0)) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_subseq_#in~t#1.base|))' at error location [2022-12-14 06:08:50,309 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:08:50,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:08:50,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2022-12-14 06:08:50,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068277164] [2022-12-14 06:08:50,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:08:50,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 06:08:50,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:08:50,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 06:08:50,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2022-12-14 06:08:50,311 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 24 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 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) [2022-12-14 06:08:51,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:08:51,947 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2022-12-14 06:08:51,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 06:08:51,947 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 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 18 [2022-12-14 06:08:51,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:08:51,950 INFO L225 Difference]: With dead ends: 43 [2022-12-14 06:08:51,950 INFO L226 Difference]: Without dead ends: 39 [2022-12-14 06:08:51,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=332, Invalid=1738, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 06:08:51,951 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 111 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:08:51,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 37 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:08:51,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-12-14 06:08:51,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2022-12-14 06:08:51,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 32 states have (on average 1.125) internal successors, (36), 34 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) [2022-12-14 06:08:51,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2022-12-14 06:08:51,954 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 18 [2022-12-14 06:08:51,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:08:51,954 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2022-12-14 06:08:51,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 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) [2022-12-14 06:08:51,955 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2022-12-14 06:08:51,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 06:08:51,955 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:08:51,955 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2022-12-14 06:08:51,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2128b4a-5f81-46e4-aa13-874db1f48b7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 06:08:52,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2128b4a-5f81-46e4-aa13-874db1f48b7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 06:08:52,157 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 06:08:52,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:08:52,158 INFO L85 PathProgramCache]: Analyzing trace with hash -555782718, now seen corresponding path program 2 times [2022-12-14 06:08:52,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:08:52,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896319278] [2022-12-14 06:08:52,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:08:52,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:08:52,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:08:53,235 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:08:53,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:08:53,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896319278] [2022-12-14 06:08:53,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896319278] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:08:53,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113999432] [2022-12-14 06:08:53,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:08:53,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:08:53,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2128b4a-5f81-46e4-aa13-874db1f48b7e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:08:53,237 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2128b4a-5f81-46e4-aa13-874db1f48b7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:08:53,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2128b4a-5f81-46e4-aa13-874db1f48b7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 06:08:53,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 06:08:53,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:08:53,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 63 conjunts are in the unsatisfiable core [2022-12-14 06:08:53,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:08:53,401 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 [2022-12-14 06:08:53,419 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 [2022-12-14 06:08:53,460 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 [2022-12-14 06:08:55,508 INFO L321 Elim1Store]: treesize reduction 312, result has 36.7 percent of original size [2022-12-14 06:08:55,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 255 treesize of output 345 [2022-12-14 06:08:57,719 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-14 06:08:58,593 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-14 06:09:27,910 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:09:27,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:09:29,942 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:09:29,942 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 297 treesize of output 210 [2022-12-14 06:09:29,962 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:09:29,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 337 treesize of output 312 [2022-12-14 06:09:30,000 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:09:30,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 283 treesize of output 326 [2022-12-14 06:09:30,015 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 270 treesize of output 256 [2022-12-14 06:09:30,041 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:09:30,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 249 treesize of output 258 [2022-12-14 06:09:30,079 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:09:30,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 case distinctions, treesize of input 233 treesize of output 260 [2022-12-14 06:09:34,643 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:09:34,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113999432] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:09:34,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1773889715] [2022-12-14 06:09:34,645 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 06:09:34,645 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:09:34,645 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:09:34,645 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:09:34,645 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:09:34,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:09:34,664 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 [2022-12-14 06:09:34,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 06:09:34,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:09:34,712 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 [2022-12-14 06:09:35,052 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:09:36,122 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1268#(and (<= 0 |ULTIMATE.start_subseq_~pt~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_subseq_#in~t#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_subseq_~s#1.offset|) (<= |ULTIMATE.start_subseq_#in~t#1.offset| 0) (< (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1)) (<= 0 |ULTIMATE.start_subseq_~t#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 0 |ULTIMATE.start_subseq_~s#1.base|) (<= 0 |ULTIMATE.start_subseq_~pt~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_subseq_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_subseq_~t#1.offset|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= |ULTIMATE.start_subseq_~t#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_subseq_#in~s#1.base|) (<= |ULTIMATE.start_subseq_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_subseq_#in~s#1.offset|) (<= 0 |ULTIMATE.start_subseq_~ps~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_subseq_#in~t#1.base|))' at error location [2022-12-14 06:09:36,122 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:09:36,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:09:36,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 37 [2022-12-14 06:09:36,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3185237] [2022-12-14 06:09:36,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:09:36,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-14 06:09:36,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:09:36,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-14 06:09:36,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1906, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 06:09:36,124 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 39 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 38 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:09:38,265 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] [2022-12-14 06:10:13,039 WARN L233 SmtUtils]: Spent 33.84s on a formula simplification. DAG size of input: 182 DAG size of output: 143 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:10:41,933 WARN L233 SmtUtils]: Spent 28.81s on a formula simplification. DAG size of input: 186 DAG size of output: 147 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:11:13,235 WARN L233 SmtUtils]: Spent 30.09s on a formula simplification. DAG size of input: 182 DAG size of output: 142 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:11:47,016 WARN L233 SmtUtils]: Spent 33.71s on a formula simplification. DAG size of input: 188 DAG size of output: 148 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:12:18,756 WARN L233 SmtUtils]: Spent 31.65s on a formula simplification. DAG size of input: 183 DAG size of output: 143 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:12:54,481 WARN L233 SmtUtils]: Spent 35.64s on a formula simplification. DAG size of input: 180 DAG size of output: 145 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:13:05,259 WARN L233 SmtUtils]: Spent 5.45s on a formula simplification. DAG size of input: 188 DAG size of output: 151 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:13:15,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:13:15,723 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2022-12-14 06:13:15,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-14 06:13:15,723 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 38 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-12-14 06:13:15,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:13:15,724 INFO L225 Difference]: With dead ends: 59 [2022-12-14 06:13:15,724 INFO L226 Difference]: Without dead ends: 59 [2022-12-14 06:13:15,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2055 ImplicationChecksByTransitivity, 219.5s TimeCoverageRelationStatistics Valid=1434, Invalid=5372, Unknown=0, NotChecked=0, Total=6806 [2022-12-14 06:13:15,725 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 254 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 29 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-12-14 06:13:15,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 13 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 272 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2022-12-14 06:13:15,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-12-14 06:13:15,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2022-12-14 06:13:15,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 50 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:13:15,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2022-12-14 06:13:15,727 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 22 [2022-12-14 06:13:15,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:13:15,727 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2022-12-14 06:13:15,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 38 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:13:15,728 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2022-12-14 06:13:15,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 06:13:15,728 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:13:15,728 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1] [2022-12-14 06:13:15,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2128b4a-5f81-46e4-aa13-874db1f48b7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 06:13:15,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2128b4a-5f81-46e4-aa13-874db1f48b7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 06:13:15,930 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 06:13:15,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:13:15,931 INFO L85 PathProgramCache]: Analyzing trace with hash -497050914, now seen corresponding path program 3 times [2022-12-14 06:13:15,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:13:15,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044899365] [2022-12-14 06:13:15,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:13:15,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:13:15,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:13:16,319 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:13:16,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:13:16,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044899365] [2022-12-14 06:13:16,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044899365] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:13:16,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333938675] [2022-12-14 06:13:16,320 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:13:16,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:13:16,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2128b4a-5f81-46e4-aa13-874db1f48b7e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:13:16,321 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2128b4a-5f81-46e4-aa13-874db1f48b7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:13:16,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2128b4a-5f81-46e4-aa13-874db1f48b7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 06:13:16,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:13:16,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:13:16,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-14 06:13:16,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:13:16,406 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 06:13:16,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 06:13:16,426 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 [2022-12-14 06:13:17,198 INFO L321 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2022-12-14 06:13:17,199 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 62 treesize of output 61 [2022-12-14 06:13:17,338 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:13:17,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:13:18,021 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 [2022-12-14 06:13:18,028 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 91 treesize of output 77 [2022-12-14 06:13:18,081 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:13:18,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333938675] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:13:18,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1533608529] [2022-12-14 06:13:18,082 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 06:13:18,082 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:13:18,083 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:13:18,083 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:13:18,083 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:13:18,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:13:18,109 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 [2022-12-14 06:13:18,128 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 [2022-12-14 06:13:18,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:13:18,164 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 [2022-12-14 06:13:18,434 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:13:19,766 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1670#(and (<= 0 |ULTIMATE.start_subseq_~pt~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) |ULTIMATE.start_subseq_#t~mem2#1|) (<= 0 |ULTIMATE.start_subseq_#in~t#1.offset|) |ULTIMATE.start_subseq_#t~short4#1| (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_subseq_~s#1.offset|) (<= |ULTIMATE.start_subseq_#in~t#1.offset| 0) (<= 0 |ULTIMATE.start_subseq_~t#1.base|) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 0 |ULTIMATE.start_subseq_~s#1.base|) (<= 0 |ULTIMATE.start_subseq_~pt~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_subseq_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_subseq_~t#1.offset|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= |ULTIMATE.start_subseq_~t#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_subseq_#in~s#1.base|) (<= |ULTIMATE.start_subseq_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_subseq_#in~s#1.offset|) (<= 0 |ULTIMATE.start_subseq_~ps~0#1.base|) (< (select |#length| |ULTIMATE.start_subseq_~pt~0#1.base|) (+ |ULTIMATE.start_subseq_~pt~0#1.offset| 1)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (not (= |ULTIMATE.start_subseq_#t~mem2#1| 0)) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_subseq_#in~t#1.base|))' at error location [2022-12-14 06:13:19,767 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:13:19,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:13:19,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 14] total 36 [2022-12-14 06:13:19,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261049729] [2022-12-14 06:13:19,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:13:19,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-14 06:13:19,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:13:19,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-14 06:13:19,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1832, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 06:13:19,768 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 38 states, 37 states have (on average 2.4324324324324325) internal successors, (90), 37 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:13:23,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:13:23,329 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2022-12-14 06:13:23,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-14 06:13:23,330 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.4324324324324325) internal successors, (90), 37 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-12-14 06:13:23,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:13:23,330 INFO L225 Difference]: With dead ends: 71 [2022-12-14 06:13:23,331 INFO L226 Difference]: Without dead ends: 63 [2022-12-14 06:13:23,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=747, Invalid=4655, Unknown=0, NotChecked=0, Total=5402 [2022-12-14 06:13:23,332 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 137 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 06:13:23,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 74 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 06:13:23,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-12-14 06:13:23,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2022-12-14 06:13:23,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 58 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:13:23,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2022-12-14 06:13:23,335 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 30 [2022-12-14 06:13:23,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:13:23,335 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2022-12-14 06:13:23,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.4324324324324325) internal successors, (90), 37 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:13:23,335 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2022-12-14 06:13:23,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 06:13:23,335 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:13:23,335 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1] [2022-12-14 06:13:23,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2128b4a-5f81-46e4-aa13-874db1f48b7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 06:13:23,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2128b4a-5f81-46e4-aa13-874db1f48b7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 06:13:23,537 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 06:13:23,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:13:23,538 INFO L85 PathProgramCache]: Analyzing trace with hash 299031398, now seen corresponding path program 3 times [2022-12-14 06:13:23,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:13:23,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580082560] [2022-12-14 06:13:23,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:13:23,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:13:23,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:13:24,222 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-14 06:13:24,222 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:13:24,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580082560] [2022-12-14 06:13:24,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580082560] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:13:24,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333150785] [2022-12-14 06:13:24,223 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:13:24,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:13:24,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2128b4a-5f81-46e4-aa13-874db1f48b7e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:13:24,224 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2128b4a-5f81-46e4-aa13-874db1f48b7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:13:24,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2128b4a-5f81-46e4-aa13-874db1f48b7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 06:13:24,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:13:24,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:13:24,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 73 conjunts are in the unsatisfiable core [2022-12-14 06:13:24,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:13:24,336 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 [2022-12-14 06:13:24,356 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 [2022-12-14 06:13:24,398 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 [2022-12-14 06:13:41,489 WARN L233 SmtUtils]: Spent 5.92s on a formula simplification. DAG size of input: 144 DAG size of output: 136 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:13:56,196 WARN L233 SmtUtils]: Spent 6.25s on a formula simplification. DAG size of input: 167 DAG size of output: 157 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:14:02,235 WARN L233 SmtUtils]: Spent 5.69s on a formula simplification. DAG size of input: 166 DAG size of output: 164 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:14:09,514 WARN L233 SmtUtils]: Spent 6.91s on a formula simplification. DAG size of input: 157 DAG size of output: 153 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:14:15,823 WARN L233 SmtUtils]: Spent 5.77s on a formula simplification that was a NOOP. DAG size: 942 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-14 06:14:15,823 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:14:15,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 21 select indices, 21 select index equivalence classes, 21 disjoint index pairs (out of 210 index pairs), introduced 21 new quantified variables, introduced 210 case distinctions, treesize of input 425 treesize of output 2592