./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-memory-alloca/cstrspn-alloca-2.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b33aa2-1dc1-4eb8-8959-cade988ffe6e/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b33aa2-1dc1-4eb8-8959-cade988ffe6e/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b33aa2-1dc1-4eb8-8959-cade988ffe6e/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b33aa2-1dc1-4eb8-8959-cade988ffe6e/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-memory-alloca/cstrspn-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b33aa2-1dc1-4eb8-8959-cade988ffe6e/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b33aa2-1dc1-4eb8-8959-cade988ffe6e/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 739cfa6985f5cbe3c485b066571ccf0bd5575c5b24975a1e4ae9d10696731379 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:18:31,837 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:18:31,839 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:18:31,879 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:18:31,879 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:18:31,883 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:18:31,885 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:18:31,888 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:18:31,890 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:18:31,895 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:18:31,897 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:18:31,898 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:18:31,899 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:18:31,901 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:18:31,903 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:18:31,905 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:18:31,906 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:18:31,907 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:18:31,908 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:18:31,914 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:18:31,916 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:18:31,918 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:18:31,919 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:18:31,920 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:18:31,929 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:18:31,930 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:18:31,930 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:18:31,931 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:18:31,932 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:18:31,933 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:18:31,934 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:18:31,935 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:18:31,936 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:18:31,938 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:18:31,939 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:18:31,939 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:18:31,940 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:18:31,940 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:18:31,940 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:18:31,941 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:18:31,942 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:18:31,943 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b33aa2-1dc1-4eb8-8959-cade988ffe6e/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2022-11-26 00:18:31,983 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:18:31,984 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:18:31,984 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:18:31,984 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:18:31,985 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:18:31,985 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:18:31,986 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:18:31,986 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:18:31,986 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:18:31,986 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:18:31,987 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:18:31,987 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:18:31,988 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:18:31,988 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:18:31,988 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:18:31,988 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:18:31,989 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:18:31,989 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:18:31,989 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-26 00:18:31,990 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-26 00:18:31,990 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:18:31,990 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-26 00:18:31,990 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:18:31,990 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:18:31,991 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-26 00:18:31,991 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-26 00:18:31,991 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-26 00:18:31,992 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:18:31,992 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-26 00:18:31,992 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:18:31,993 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:18:31,993 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:18:31,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:18:31,993 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:18:31,993 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:18:31,994 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:18:31,994 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:18:31,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:18:31,994 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:18:31,994 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_e9b33aa2-1dc1-4eb8-8959-cade988ffe6e/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b33aa2-1dc1-4eb8-8959-cade988ffe6e/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 739cfa6985f5cbe3c485b066571ccf0bd5575c5b24975a1e4ae9d10696731379 [2022-11-26 00:18:32,325 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:18:32,349 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:18:32,352 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:18:32,353 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:18:32,354 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:18:32,355 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b33aa2-1dc1-4eb8-8959-cade988ffe6e/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/termination-memory-alloca/cstrspn-alloca-2.i [2022-11-26 00:18:35,351 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:18:35,628 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:18:35,628 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b33aa2-1dc1-4eb8-8959-cade988ffe6e/sv-benchmarks/c/termination-memory-alloca/cstrspn-alloca-2.i [2022-11-26 00:18:35,646 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b33aa2-1dc1-4eb8-8959-cade988ffe6e/bin/utaipan-ByfvJB40ur/data/1f9969afe/618d0d17f27044c4a67f498160fcaa99/FLAG7ffcef975 [2022-11-26 00:18:35,660 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b33aa2-1dc1-4eb8-8959-cade988ffe6e/bin/utaipan-ByfvJB40ur/data/1f9969afe/618d0d17f27044c4a67f498160fcaa99 [2022-11-26 00:18:35,663 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:18:35,664 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:18:35,665 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:18:35,666 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:18:35,670 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:18:35,670 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:18:35" (1/1) ... [2022-11-26 00:18:35,671 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27384a82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:35, skipping insertion in model container [2022-11-26 00:18:35,672 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:18:35" (1/1) ... [2022-11-26 00:18:35,679 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:18:35,711 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:18:36,011 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:18:36,025 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:18:36,089 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:18:36,129 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:18:36,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:36 WrapperNode [2022-11-26 00:18:36,129 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:18:36,131 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:18:36,131 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:18:36,131 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:18:36,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:36" (1/1) ... [2022-11-26 00:18:36,168 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:36" (1/1) ... [2022-11-26 00:18:36,200 INFO L138 Inliner]: procedures = 111, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 80 [2022-11-26 00:18:36,200 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:18:36,201 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:18:36,201 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:18:36,202 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:18:36,211 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:36" (1/1) ... [2022-11-26 00:18:36,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:36" (1/1) ... [2022-11-26 00:18:36,225 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:36" (1/1) ... [2022-11-26 00:18:36,226 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:36" (1/1) ... [2022-11-26 00:18:36,237 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:36" (1/1) ... [2022-11-26 00:18:36,245 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:36" (1/1) ... [2022-11-26 00:18:36,248 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:36" (1/1) ... [2022-11-26 00:18:36,257 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:36" (1/1) ... [2022-11-26 00:18:36,259 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:18:36,260 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:18:36,260 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:18:36,260 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:18:36,261 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:36" (1/1) ... [2022-11-26 00:18:36,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:18:36,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b33aa2-1dc1-4eb8-8959-cade988ffe6e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:18:36,293 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b33aa2-1dc1-4eb8-8959-cade988ffe6e/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:18:36,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b33aa2-1dc1-4eb8-8959-cade988ffe6e/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:18:36,326 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-26 00:18:36,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-26 00:18:36,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 00:18:36,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:18:36,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:18:36,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:18:36,447 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:18:36,449 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:18:36,736 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:18:36,819 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:18:36,819 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-26 00:18:36,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:18:36 BoogieIcfgContainer [2022-11-26 00:18:36,822 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:18:36,829 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:18:36,830 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:18:36,834 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:18:36,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:18:35" (1/3) ... [2022-11-26 00:18:36,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f81ae9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:18:36, skipping insertion in model container [2022-11-26 00:18:36,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:36" (2/3) ... [2022-11-26 00:18:36,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f81ae9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:18:36, skipping insertion in model container [2022-11-26 00:18:36,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:18:36" (3/3) ... [2022-11-26 00:18:36,837 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrspn-alloca-2.i [2022-11-26 00:18:36,857 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:18:36,857 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2022-11-26 00:18:36,904 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:18:36,910 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;@98028b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:18:36,911 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2022-11-26 00:18:36,917 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 15 states have (on average 2.4) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:36,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-26 00:18:36,926 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:36,926 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-26 00:18:36,927 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)] === [2022-11-26 00:18:36,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:36,937 INFO L85 PathProgramCache]: Analyzing trace with hash 3923, now seen corresponding path program 1 times [2022-11-26 00:18:36,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:18:36,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321369743] [2022-11-26 00:18:36,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:36,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:18:37,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:37,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:18:37,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:18:37,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321369743] [2022-11-26 00:18:37,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321369743] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:18:37,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:18:37,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:18:37,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619991712] [2022-11-26 00:18:37,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:18:37,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:18:37,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:18:37,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:18:37,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:18:37,389 INFO L87 Difference]: Start difference. First operand has 31 states, 15 states have (on average 2.4) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:37,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:18:37,438 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-11-26 00:18:37,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:18:37,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-26 00:18:37,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:18:37,448 INFO L225 Difference]: With dead ends: 30 [2022-11-26 00:18:37,449 INFO L226 Difference]: Without dead ends: 29 [2022-11-26 00:18:37,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:18:37,454 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:18:37,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 15 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:18:37,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-26 00:18:37,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-26 00:18:37,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 28 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:37,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-11-26 00:18:37,485 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 2 [2022-11-26 00:18:37,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:18:37,485 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-11-26 00:18:37,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:37,486 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-11-26 00:18:37,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-26 00:18:37,486 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:37,487 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-26 00:18:37,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:18:37,487 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)] === [2022-11-26 00:18:37,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:37,488 INFO L85 PathProgramCache]: Analyzing trace with hash 3924, now seen corresponding path program 1 times [2022-11-26 00:18:37,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:18:37,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563805741] [2022-11-26 00:18:37,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:37,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:18:37,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:37,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:18:37,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:18:37,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563805741] [2022-11-26 00:18:37,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563805741] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:18:37,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:18:37,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:18:37,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867576862] [2022-11-26 00:18:37,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:18:37,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:18:37,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:18:37,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:18:37,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:18:37,806 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:37,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:18:37,839 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2022-11-26 00:18:37,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:18:37,839 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-26 00:18:37,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:18:37,840 INFO L225 Difference]: With dead ends: 28 [2022-11-26 00:18:37,840 INFO L226 Difference]: Without dead ends: 28 [2022-11-26 00:18:37,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:18:37,842 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 30 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:18:37,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 16 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:18:37,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-26 00:18:37,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-26 00:18:37,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 15 states have (on average 2.066666666666667) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:37,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-11-26 00:18:37,847 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 2 [2022-11-26 00:18:37,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:18:37,847 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-11-26 00:18:37,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:37,848 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-11-26 00:18:37,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-26 00:18:37,848 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:37,848 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-26 00:18:37,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:18:37,849 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)] === [2022-11-26 00:18:37,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:37,849 INFO L85 PathProgramCache]: Analyzing trace with hash 121602, now seen corresponding path program 1 times [2022-11-26 00:18:37,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:18:37,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811182822] [2022-11-26 00:18:37,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:37,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:18:37,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:37,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:18:37,932 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:18:37,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811182822] [2022-11-26 00:18:37,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811182822] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:18:37,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:18:37,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:18:37,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245704730] [2022-11-26 00:18:37,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:18:37,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:18:37,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:18:37,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:18:37,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:18:37,936 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:37,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:18:37,977 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2022-11-26 00:18:37,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:18:37,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-26 00:18:37,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:18:37,980 INFO L225 Difference]: With dead ends: 27 [2022-11-26 00:18:37,980 INFO L226 Difference]: Without dead ends: 27 [2022-11-26 00:18:37,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:18:37,982 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 26 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:18:37,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 14 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:18:37,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-26 00:18:37,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-26 00:18:37,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 15 states have (on average 2.0) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:37,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-11-26 00:18:37,987 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 3 [2022-11-26 00:18:37,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:18:37,987 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-11-26 00:18:37,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:37,987 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-11-26 00:18:37,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-26 00:18:37,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:37,988 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-26 00:18:37,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 00:18:37,989 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)] === [2022-11-26 00:18:37,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:37,989 INFO L85 PathProgramCache]: Analyzing trace with hash 121603, now seen corresponding path program 1 times [2022-11-26 00:18:37,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:18:37,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157396536] [2022-11-26 00:18:37,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:37,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:18:38,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:38,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:18:38,147 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:18:38,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157396536] [2022-11-26 00:18:38,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157396536] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:18:38,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:18:38,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:18:38,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143130842] [2022-11-26 00:18:38,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:18:38,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:18:38,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:18:38,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:18:38,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:18:38,150 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:38,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:18:38,179 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-11-26 00:18:38,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:18:38,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-26 00:18:38,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:18:38,180 INFO L225 Difference]: With dead ends: 26 [2022-11-26 00:18:38,180 INFO L226 Difference]: Without dead ends: 26 [2022-11-26 00:18:38,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:18:38,182 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:18:38,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 15 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:18:38,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-26 00:18:38,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-26 00:18:38,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:38,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-11-26 00:18:38,186 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 3 [2022-11-26 00:18:38,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:18:38,186 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-11-26 00:18:38,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:38,187 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-11-26 00:18:38,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-26 00:18:38,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:38,187 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-26 00:18:38,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-26 00:18:38,188 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)] === [2022-11-26 00:18:38,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:38,189 INFO L85 PathProgramCache]: Analyzing trace with hash 3771797, now seen corresponding path program 1 times [2022-11-26 00:18:38,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:18:38,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439238676] [2022-11-26 00:18:38,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:38,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:18:38,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:38,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:18:38,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:18:38,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439238676] [2022-11-26 00:18:38,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439238676] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:18:38,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:18:38,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:18:38,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10741699] [2022-11-26 00:18:38,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:18:38,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:18:38,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:18:38,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:18:38,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:18:38,247 INFO L87 Difference]: Start difference. First operand 26 states and 29 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) [2022-11-26 00:18:38,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:18:38,306 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2022-11-26 00:18:38,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:18:38,307 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 [2022-11-26 00:18:38,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:18:38,309 INFO L225 Difference]: With dead ends: 24 [2022-11-26 00:18:38,309 INFO L226 Difference]: Without dead ends: 24 [2022-11-26 00:18:38,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:18:38,314 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 44 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:18:38,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 12 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:18:38,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-26 00:18:38,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-26 00:18:38,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.8) 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) [2022-11-26 00:18:38,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-11-26 00:18:38,328 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 4 [2022-11-26 00:18:38,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:18:38,329 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-11-26 00:18:38,329 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) [2022-11-26 00:18:38,330 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-11-26 00:18:38,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-26 00:18:38,331 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:38,335 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-26 00:18:38,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-26 00:18:38,336 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)] === [2022-11-26 00:18:38,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:38,336 INFO L85 PathProgramCache]: Analyzing trace with hash 3771798, now seen corresponding path program 1 times [2022-11-26 00:18:38,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:18:38,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855360318] [2022-11-26 00:18:38,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:38,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:18:38,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:38,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:18:38,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:18:38,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855360318] [2022-11-26 00:18:38,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855360318] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:18:38,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:18:38,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:18:38,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065190872] [2022-11-26 00:18:38,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:18:38,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:18:38,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:18:38,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:18:38,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:18:38,504 INFO L87 Difference]: Start difference. First operand 24 states and 27 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) [2022-11-26 00:18:38,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:18:38,570 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2022-11-26 00:18:38,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:18:38,570 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 [2022-11-26 00:18:38,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:18:38,571 INFO L225 Difference]: With dead ends: 43 [2022-11-26 00:18:38,571 INFO L226 Difference]: Without dead ends: 43 [2022-11-26 00:18:38,572 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 [2022-11-26 00:18:38,573 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 115 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:18:38,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 22 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:18:38,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-26 00:18:38,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 27. [2022-11-26 00:18:38,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:38,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-11-26 00:18:38,577 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 4 [2022-11-26 00:18:38,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:18:38,577 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-11-26 00:18:38,578 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) [2022-11-26 00:18:38,578 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-11-26 00:18:38,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:18:38,578 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:38,579 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:18:38,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-26 00:18:38,579 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-26 00:18:38,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:38,580 INFO L85 PathProgramCache]: Analyzing trace with hash 696459362, now seen corresponding path program 1 times [2022-11-26 00:18:38,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:18:38,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080895014] [2022-11-26 00:18:38,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:38,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:18:38,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:38,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:18:38,684 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:18:38,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080895014] [2022-11-26 00:18:38,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080895014] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:18:38,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:18:38,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:18:38,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269702146] [2022-11-26 00:18:38,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:18:38,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:18:38,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:18:38,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:18:38,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:18:38,689 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:38,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:18:38,737 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-11-26 00:18:38,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:18:38,737 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-26 00:18:38,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:18:38,738 INFO L225 Difference]: With dead ends: 26 [2022-11-26 00:18:38,738 INFO L226 Difference]: Without dead ends: 26 [2022-11-26 00:18:38,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:18:38,739 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 34 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:18:38,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 14 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:18:38,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-26 00:18:38,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2022-11-26 00:18:38,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:38,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-11-26 00:18:38,750 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 7 [2022-11-26 00:18:38,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:18:38,750 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-11-26 00:18:38,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:38,751 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-11-26 00:18:38,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:18:38,751 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:38,752 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:18:38,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-26 00:18:38,752 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-26 00:18:38,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:38,752 INFO L85 PathProgramCache]: Analyzing trace with hash 696459363, now seen corresponding path program 1 times [2022-11-26 00:18:38,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:18:38,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9088286] [2022-11-26 00:18:38,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:38,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:18:38,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:38,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:18:38,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:18:38,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9088286] [2022-11-26 00:18:38,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9088286] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:18:38,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:18:38,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:18:38,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854742712] [2022-11-26 00:18:38,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:18:38,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:18:38,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:18:38,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:18:38,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:18:38,954 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:39,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:18:39,062 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2022-11-26 00:18:39,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:18:39,062 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-26 00:18:39,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:18:39,063 INFO L225 Difference]: With dead ends: 37 [2022-11-26 00:18:39,063 INFO L226 Difference]: Without dead ends: 37 [2022-11-26 00:18:39,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:18:39,064 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 77 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:18:39,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 20 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:18:39,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-26 00:18:39,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2022-11-26 00:18:39,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:39,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-11-26 00:18:39,067 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 7 [2022-11-26 00:18:39,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:18:39,067 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-11-26 00:18:39,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:39,067 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-11-26 00:18:39,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-26 00:18:39,068 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:39,068 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:18:39,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-26 00:18:39,068 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)] === [2022-11-26 00:18:39,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:39,069 INFO L85 PathProgramCache]: Analyzing trace with hash 115336708, now seen corresponding path program 1 times [2022-11-26 00:18:39,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:18:39,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554924106] [2022-11-26 00:18:39,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:39,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:18:39,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:39,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:18:39,231 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:18:39,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554924106] [2022-11-26 00:18:39,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554924106] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:18:39,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:18:39,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:18:39,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343724538] [2022-11-26 00:18:39,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:18:39,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:18:39,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:18:39,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:18:39,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:18:39,233 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:39,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:18:39,257 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2022-11-26 00:18:39,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:18:39,258 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 [2022-11-26 00:18:39,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:18:39,258 INFO L225 Difference]: With dead ends: 28 [2022-11-26 00:18:39,258 INFO L226 Difference]: Without dead ends: 25 [2022-11-26 00:18:39,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:18:39,259 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 16 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:18:39,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 26 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:18:39,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-26 00:18:39,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-26 00:18:39,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.45) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:39,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-11-26 00:18:39,263 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 8 [2022-11-26 00:18:39,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:18:39,263 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-11-26 00:18:39,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:39,263 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-11-26 00:18:39,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-26 00:18:39,264 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:39,264 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:18:39,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-26 00:18:39,264 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-26 00:18:39,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:39,265 INFO L85 PathProgramCache]: Analyzing trace with hash -764729450, now seen corresponding path program 1 times [2022-11-26 00:18:39,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:18:39,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361085337] [2022-11-26 00:18:39,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:39,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:18:39,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:39,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:18:39,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:18:39,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361085337] [2022-11-26 00:18:39,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361085337] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:18:39,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:18:39,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:18:39,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337612455] [2022-11-26 00:18:39,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:18:39,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:18:39,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:18:39,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:18:39,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:18:39,294 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:39,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:18:39,313 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2022-11-26 00:18:39,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:18:39,313 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-26 00:18:39,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:18:39,314 INFO L225 Difference]: With dead ends: 27 [2022-11-26 00:18:39,314 INFO L226 Difference]: Without dead ends: 27 [2022-11-26 00:18:39,314 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 [2022-11-26 00:18:39,315 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 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 [2022-11-26 00:18:39,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:18:39,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-26 00:18:39,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-26 00:18:39,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:39,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-11-26 00:18:39,327 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 10 [2022-11-26 00:18:39,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:18:39,328 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-11-26 00:18:39,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:39,328 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-11-26 00:18:39,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-26 00:18:39,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:39,328 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:18:39,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-26 00:18:39,329 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-26 00:18:39,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:39,329 INFO L85 PathProgramCache]: Analyzing trace with hash 2063036645, now seen corresponding path program 1 times [2022-11-26 00:18:39,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:18:39,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604347636] [2022-11-26 00:18:39,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:39,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:18:39,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:39,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:18:39,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:18:39,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604347636] [2022-11-26 00:18:39,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604347636] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:18:39,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792791015] [2022-11-26 00:18:39,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:39,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:18:39,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b33aa2-1dc1-4eb8-8959-cade988ffe6e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:18:39,635 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b33aa2-1dc1-4eb8-8959-cade988ffe6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:18:39,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b33aa2-1dc1-4eb8-8959-cade988ffe6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:18:39,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:39,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-26 00:18:39,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:18:39,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:18:40,088 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:18:40,089 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 [2022-11-26 00:18:40,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:18:40,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:18:40,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-11-26 00:18:40,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-26 00:18:40,526 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 [2022-11-26 00:18:40,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:18:40,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792791015] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:18:40,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1666849947] [2022-11-26 00:18:40,571 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-26 00:18:40,571 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:18:40,576 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:18:40,582 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:18:40,583 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:18:40,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:18:40,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-26 00:18:40,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:18:40,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:18:40,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-26 00:18:41,205 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:18:43,933 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '721#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~sc1~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrspn_~sc1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_cstrspn_~sc1~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_~s~0#1.base|) (+ |ULTIMATE.start_cstrspn_~s~0#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-26 00:18:43,934 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:18:43,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:18:43,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2022-11-26 00:18:43,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450586242] [2022-11-26 00:18:43,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:18:43,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-26 00:18:43,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:18:43,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-26 00:18:43,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2022-11-26 00:18:43,936 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:44,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:18:44,603 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2022-11-26 00:18:44,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-26 00:18:44,604 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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) Word has length 11 [2022-11-26 00:18:44,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:18:44,606 INFO L225 Difference]: With dead ends: 44 [2022-11-26 00:18:44,606 INFO L226 Difference]: Without dead ends: 44 [2022-11-26 00:18:44,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=236, Invalid=1024, Unknown=0, NotChecked=0, Total=1260 [2022-11-26 00:18:44,607 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 196 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:18:44,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 14 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:18:44,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-26 00:18:44,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 24. [2022-11-26 00:18:44,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:44,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-11-26 00:18:44,610 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 11 [2022-11-26 00:18:44,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:18:44,611 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-11-26 00:18:44,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:44,611 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-11-26 00:18:44,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-26 00:18:44,612 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:44,612 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:18:44,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b33aa2-1dc1-4eb8-8959-cade988ffe6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:18:44,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b33aa2-1dc1-4eb8-8959-cade988ffe6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:18:44,813 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-26 00:18:44,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:44,813 INFO L85 PathProgramCache]: Analyzing trace with hash -465631564, now seen corresponding path program 1 times [2022-11-26 00:18:44,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:18:44,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952935783] [2022-11-26 00:18:44,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:44,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:18:44,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:44,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:18:44,931 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:18:44,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952935783] [2022-11-26 00:18:44,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952935783] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:18:44,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:18:44,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-26 00:18:44,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149052991] [2022-11-26 00:18:44,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:18:44,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:18:44,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:18:44,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:18:44,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:18:44,937 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:45,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:18:45,053 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-11-26 00:18:45,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-26 00:18:45,053 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-26 00:18:45,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:18:45,055 INFO L225 Difference]: With dead ends: 26 [2022-11-26 00:18:45,055 INFO L226 Difference]: Without dead ends: 23 [2022-11-26 00:18:45,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:18:45,056 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 30 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:18:45,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 20 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:18:45,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-26 00:18:45,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-26 00:18:45,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 20 states have (on average 1.25) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:45,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-11-26 00:18:45,061 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 12 [2022-11-26 00:18:45,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:18:45,061 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-11-26 00:18:45,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:45,061 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-11-26 00:18:45,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 00:18:45,062 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:45,062 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:18:45,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-26 00:18:45,062 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-26 00:18:45,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:45,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1696712637, now seen corresponding path program 1 times [2022-11-26 00:18:45,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:18:45,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137463080] [2022-11-26 00:18:45,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:45,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:18:45,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:45,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:18:45,484 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:18:45,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137463080] [2022-11-26 00:18:45,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137463080] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:18:45,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842975544] [2022-11-26 00:18:45,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:45,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:18:45,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b33aa2-1dc1-4eb8-8959-cade988ffe6e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:18:45,486 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b33aa2-1dc1-4eb8-8959-cade988ffe6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:18:45,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b33aa2-1dc1-4eb8-8959-cade988ffe6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:18:45,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:45,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-26 00:18:45,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:18:45,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:18:45,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:18:45,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-26 00:18:46,084 INFO L321 Elim1Store]: treesize reduction 3, result has 92.7 percent of original size [2022-11-26 00:18:46,085 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 33 treesize of output 51 [2022-11-26 00:18:46,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:18:46,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:18:46,679 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:18:46,679 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 62 treesize of output 40 [2022-11-26 00:18:46,715 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:18:46,716 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 103 treesize of output 114 [2022-11-26 00:18:46,740 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:18:46,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 64 treesize of output 62 [2022-11-26 00:18:46,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:18:47,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:18:47,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842975544] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:18:47,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1610393954] [2022-11-26 00:18:47,157 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-26 00:18:47,157 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:18:47,157 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:18:47,157 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:18:47,158 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:18:47,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:18:47,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-26 00:18:47,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:18:47,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:18:47,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-26 00:18:47,848 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:18:50,010 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '980#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~sc1~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (< (select |#length| |ULTIMATE.start_cstrspn_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrspn_~sc1~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_cstrspn_~sc1~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-26 00:18:50,010 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:18:50,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:18:50,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 24 [2022-11-26 00:18:50,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28013438] [2022-11-26 00:18:50,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:18:50,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-26 00:18:50,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:18:50,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-26 00:18:50,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1167, Unknown=1, NotChecked=0, Total=1332 [2022-11-26 00:18:50,012 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 26 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:51,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:18:51,894 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2022-11-26 00:18:51,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-26 00:18:51,895 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-26 00:18:51,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:18:51,895 INFO L225 Difference]: With dead ends: 64 [2022-11-26 00:18:51,895 INFO L226 Difference]: Without dead ends: 64 [2022-11-26 00:18:51,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=519, Invalid=2342, Unknown=1, NotChecked=0, Total=2862 [2022-11-26 00:18:51,897 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 317 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:18:51,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 29 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:18:51,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-26 00:18:51,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 48. [2022-11-26 00:18:51,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 47 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:51,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2022-11-26 00:18:51,901 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 13 [2022-11-26 00:18:51,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:18:51,901 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2022-11-26 00:18:51,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:51,902 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2022-11-26 00:18:51,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-26 00:18:51,902 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:51,902 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:18:51,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b33aa2-1dc1-4eb8-8959-cade988ffe6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:18:52,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b33aa2-1dc1-4eb8-8959-cade988ffe6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-26 00:18:52,112 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-26 00:18:52,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:52,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1626058855, now seen corresponding path program 2 times [2022-11-26 00:18:52,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:18:52,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772587480] [2022-11-26 00:18:52,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:52,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:18:52,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:52,807 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:18:52,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:18:52,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772587480] [2022-11-26 00:18:52,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772587480] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:18:52,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696737233] [2022-11-26 00:18:52,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:18:52,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:18:52,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b33aa2-1dc1-4eb8-8959-cade988ffe6e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:18:52,812 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b33aa2-1dc1-4eb8-8959-cade988ffe6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:18:52,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b33aa2-1dc1-4eb8-8959-cade988ffe6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:18:52,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:18:52,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:18:52,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-26 00:18:52,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:18:52,928 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:18:52,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-26 00:18:52,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:18:59,742 INFO L321 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2022-11-26 00:18:59,742 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 27 treesize of output 36 [2022-11-26 00:18:59,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:18:59,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:19:00,411 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 27 treesize of output 23 [2022-11-26 00:19:00,424 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:19:00,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 43 treesize of output 47 [2022-11-26 00:19:00,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:00,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696737233] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:19:00,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [47429179] [2022-11-26 00:19:00,499 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-26 00:19:00,500 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:19:00,500 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:19:00,500 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:19:00,500 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:19:00,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:00,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-26 00:19:00,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:19:00,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:00,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-26 00:19:00,845 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:19:03,611 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1250#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~sc1~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrspn_~sc1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_cstrspn_~sc1~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_~s~0#1.base|) (+ |ULTIMATE.start_cstrspn_~s~0#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-26 00:19:03,611 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:19:03,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:19:03,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 27 [2022-11-26 00:19:03,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994191421] [2022-11-26 00:19:03,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:19:03,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-26 00:19:03,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:19:03,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-26 00:19:03,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1291, Unknown=3, NotChecked=0, Total=1482 [2022-11-26 00:19:03,614 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 29 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:07,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:07,209 INFO L93 Difference]: Finished difference Result 153 states and 173 transitions. [2022-11-26 00:19:07,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-26 00:19:07,210 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-26 00:19:07,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:07,211 INFO L225 Difference]: With dead ends: 153 [2022-11-26 00:19:07,211 INFO L226 Difference]: Without dead ends: 153 [2022-11-26 00:19:07,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=528, Invalid=2549, Unknown=3, NotChecked=0, Total=3080 [2022-11-26 00:19:07,213 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 395 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:07,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 26 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 00:19:07,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-11-26 00:19:07,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 84. [2022-11-26 00:19:07,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 82 states have (on average 1.2317073170731707) internal successors, (101), 83 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:07,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 101 transitions. [2022-11-26 00:19:07,218 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 101 transitions. Word has length 15 [2022-11-26 00:19:07,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:07,219 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 101 transitions. [2022-11-26 00:19:07,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:07,219 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 101 transitions. [2022-11-26 00:19:07,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-26 00:19:07,220 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:07,220 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:19:07,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b33aa2-1dc1-4eb8-8959-cade988ffe6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:19:07,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b33aa2-1dc1-4eb8-8959-cade988ffe6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-26 00:19:07,426 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-26 00:19:07,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:07,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1961691373, now seen corresponding path program 3 times [2022-11-26 00:19:07,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:19:07,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786051307] [2022-11-26 00:19:07,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:07,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:07,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:08,302 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:08,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:19:08,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786051307] [2022-11-26 00:19:08,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786051307] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:19:08,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419664242] [2022-11-26 00:19:08,303 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:19:08,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:19:08,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b33aa2-1dc1-4eb8-8959-cade988ffe6e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:19:08,308 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b33aa2-1dc1-4eb8-8959-cade988ffe6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:19:08,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b33aa2-1dc1-4eb8-8959-cade988ffe6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:19:08,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:19:08,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:19:08,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-26 00:19:08,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:19:08,430 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:19:08,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-26 00:19:08,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:19:09,946 INFO L321 Elim1Store]: treesize reduction 16, result has 71.4 percent of original size [2022-11-26 00:19:09,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 72 treesize of output 72 [2022-11-26 00:19:10,181 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:10,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:19:11,646 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 74 treesize of output 64 [2022-11-26 00:19:11,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 96 [2022-11-26 00:19:11,764 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:11,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419664242] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:19:11,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1524982803] [2022-11-26 00:19:11,766 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-26 00:19:11,766 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:19:11,767 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:19:11,767 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:19:11,767 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:19:11,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:11,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-26 00:19:11,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:19:11,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:11,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-26 00:19:12,077 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:19:15,336 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1735#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~sc1~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrspn_~sc1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_cstrspn_~sc1~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_~s~0#1.base|) (+ |ULTIMATE.start_cstrspn_~s~0#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-26 00:19:15,336 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:19:15,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:19:15,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 18, 18] total 46 [2022-11-26 00:19:15,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322495033] [2022-11-26 00:19:15,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:19:15,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-26 00:19:15,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:19:15,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-26 00:19:15,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=2956, Unknown=0, NotChecked=0, Total=3306 [2022-11-26 00:19:15,339 INFO L87 Difference]: Start difference. First operand 84 states and 101 transitions. Second operand has 48 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 47 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:24,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:24,323 INFO L93 Difference]: Finished difference Result 273 states and 308 transitions. [2022-11-26 00:19:24,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-26 00:19:24,324 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 47 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-26 00:19:24,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:24,326 INFO L225 Difference]: With dead ends: 273 [2022-11-26 00:19:24,326 INFO L226 Difference]: Without dead ends: 273 [2022-11-26 00:19:24,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2031 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=1178, Invalid=7194, Unknown=0, NotChecked=0, Total=8372 [2022-11-26 00:19:24,329 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 871 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 993 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 871 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:24,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [871 Valid, 80 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 993 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-26 00:19:24,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-11-26 00:19:24,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 144. [2022-11-26 00:19:24,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 142 states have (on average 1.2394366197183098) internal successors, (176), 143 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:24,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 176 transitions. [2022-11-26 00:19:24,338 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 176 transitions. Word has length 27 [2022-11-26 00:19:24,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:24,339 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 176 transitions. [2022-11-26 00:19:24,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 47 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:24,339 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 176 transitions. [2022-11-26 00:19:24,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-26 00:19:24,340 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:24,340 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2022-11-26 00:19:24,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b33aa2-1dc1-4eb8-8959-cade988ffe6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:19:24,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b33aa2-1dc1-4eb8-8959-cade988ffe6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:19:24,550 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)] === [2022-11-26 00:19:24,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:24,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1848408483, now seen corresponding path program 2 times [2022-11-26 00:19:24,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:19:24,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412984484] [2022-11-26 00:19:24,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:24,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:24,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:25,689 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:25,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:19:25,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412984484] [2022-11-26 00:19:25,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412984484] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:19:25,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470776848] [2022-11-26 00:19:25,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:19:25,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:19:25,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b33aa2-1dc1-4eb8-8959-cade988ffe6e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:19:25,693 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b33aa2-1dc1-4eb8-8959-cade988ffe6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:19:25,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b33aa2-1dc1-4eb8-8959-cade988ffe6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:19:25,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-26 00:19:25,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:19:25,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-26 00:19:25,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:19:25,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:19:25,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:19:26,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-26 00:19:30,237 INFO L321 Elim1Store]: treesize reduction 16, result has 73.8 percent of original size [2022-11-26 00:19:30,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 64 [2022-11-26 00:19:30,553 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:30,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:19:32,333 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_34| Int) (|v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_33| Int) (|v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_35| Int) (v_ArrVal_198 (Array Int Int))) (let ((.cse0 (select v_ArrVal_198 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|)) (.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_198) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (not (<= 0 |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_33|)) (not (<= |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_33| (+ |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_34| 1))) (not (= .cse0 (select .cse1 |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_33|))) (not (= (select .cse1 |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_35|) .cse0)) (= .cse0 0) (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_35|) (not (= .cse0 (select .cse1 |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_34|))) (not (<= |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_34| (+ |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_35| 1))) (<= (+ 2 |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_33|) (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|))))) is different from false [2022-11-26 00:19:32,364 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:19:32,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 51 [2022-11-26 00:19:32,411 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:19:32,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 96 treesize of output 137 [2022-11-26 00:19:32,460 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:19:32,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 106 [2022-11-26 00:19:32,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:19:32,876 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:32,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470776848] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:19:32,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1002287741] [2022-11-26 00:19:32,878 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-26 00:19:32,879 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:19:32,879 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:19:32,879 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:19:32,879 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:19:32,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:32,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-26 00:19:32,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:19:32,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:32,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-26 00:19:33,457 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:19:36,408 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2460#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~sc1~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (< (select |#length| |ULTIMATE.start_cstrspn_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrspn_~sc1~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_cstrspn_~sc1~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-26 00:19:36,408 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:19:36,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:19:36,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 48 [2022-11-26 00:19:36,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258998017] [2022-11-26 00:19:36,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:19:36,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-26 00:19:36,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:19:36,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-26 00:19:36,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=3286, Unknown=2, NotChecked=116, Total=3660 [2022-11-26 00:19:36,412 INFO L87 Difference]: Start difference. First operand 144 states and 176 transitions. Second operand has 50 states, 49 states have (on average 1.8979591836734695) internal successors, (93), 49 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:20:11,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:20:11,102 INFO L93 Difference]: Finished difference Result 746 states and 896 transitions. [2022-11-26 00:20:11,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-26 00:20:11,103 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.8979591836734695) internal successors, (93), 49 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-26 00:20:11,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:20:11,108 INFO L225 Difference]: With dead ends: 746 [2022-11-26 00:20:11,108 INFO L226 Difference]: Without dead ends: 746 [2022-11-26 00:20:11,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 150 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6828 ImplicationChecksByTransitivity, 39.6s TimeCoverageRelationStatistics Valid=3340, Invalid=19312, Unknown=2, NotChecked=298, Total=22952 [2022-11-26 00:20:11,113 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 1718 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 1333 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1718 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 1538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:20:11,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1718 Valid, 222 Invalid, 1538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1333 Invalid, 0 Unknown, 123 Unchecked, 2.7s Time] [2022-11-26 00:20:11,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2022-11-26 00:20:11,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 245. [2022-11-26 00:20:11,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 243 states have (on average 1.2181069958847737) internal successors, (296), 244 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:20:11,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 296 transitions. [2022-11-26 00:20:11,126 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 296 transitions. Word has length 31 [2022-11-26 00:20:11,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:20:11,126 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 296 transitions. [2022-11-26 00:20:11,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.8979591836734695) internal successors, (93), 49 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:20:11,127 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 296 transitions. [2022-11-26 00:20:11,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-26 00:20:11,128 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:20:11,128 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2022-11-26 00:20:11,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b33aa2-1dc1-4eb8-8959-cade988ffe6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:20:11,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b33aa2-1dc1-4eb8-8959-cade988ffe6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-26 00:20:11,340 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-26 00:20:11,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:20:11,340 INFO L85 PathProgramCache]: Analyzing trace with hash -363908955, now seen corresponding path program 1 times [2022-11-26 00:20:11,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:20:11,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106286016] [2022-11-26 00:20:11,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:20:11,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:20:11,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:20:12,188 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:20:12,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:20:12,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106286016] [2022-11-26 00:20:12,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106286016] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:20:12,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049753774] [2022-11-26 00:20:12,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:20:12,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:20:12,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b33aa2-1dc1-4eb8-8959-cade988ffe6e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:20:12,204 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b33aa2-1dc1-4eb8-8959-cade988ffe6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:20:12,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b33aa2-1dc1-4eb8-8959-cade988ffe6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:20:12,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:20:12,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-26 00:20:12,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:20:12,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:20:12,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:20:12,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-26 00:20:49,209 INFO L321 Elim1Store]: treesize reduction 45, result has 80.3 percent of original size [2022-11-26 00:20:49,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 75 treesize of output 211 [2022-11-26 00:20:52,047 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-26 00:20:53,143 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 11 refuted. 22 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:20:53,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:20:55,000 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:20:55,001 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 188 treesize of output 100 [2022-11-26 00:20:55,174 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:20:55,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 301 treesize of output 439 [2022-11-26 00:20:55,292 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:20:55,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 198 treesize of output 268 [2022-11-26 00:20:55,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12