./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-memory-alloca/openbsd_cstrlcpy-alloca-2.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e7fbc69 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_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-memory-alloca/openbsd_cstrlcpy-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW --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 f1ad2d5826e88851ec05294e79547a11a54665f4a2cf6f0e66f9eabed656148f --- 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-4e7fbc6 [2022-11-23 14:58:36,772 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:58:36,775 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:58:36,819 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:58:36,820 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:58:36,823 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:58:36,826 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:58:36,829 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:58:36,831 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:58:36,836 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:58:36,837 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:58:36,838 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:58:36,838 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:58:36,839 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:58:36,840 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:58:36,841 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:58:36,842 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:58:36,843 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:58:36,844 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:58:36,846 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:58:36,851 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:58:36,854 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:58:36,856 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:58:36,857 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:58:36,871 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:58:36,872 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:58:36,872 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:58:36,873 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:58:36,873 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:58:36,874 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:58:36,875 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:58:36,875 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:58:36,876 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:58:36,877 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:58:36,878 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:58:36,878 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:58:36,879 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:58:36,879 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:58:36,880 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:58:36,880 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:58:36,881 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:58:36,885 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2022-11-23 14:58:36,930 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:58:36,930 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:58:36,931 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:58:36,931 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:58:36,932 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:58:36,932 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:58:36,932 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:58:36,933 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:58:36,933 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:58:36,933 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:58:36,934 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:58:36,934 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:58:36,935 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:58:36,935 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:58:36,935 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:58:36,935 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:58:36,935 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:58:36,936 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:58:36,937 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 14:58:36,937 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 14:58:36,937 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:58:36,937 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 14:58:36,937 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:58:36,938 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:58:36,938 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 14:58:36,938 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 14:58:36,938 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 14:58:36,938 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:58:36,939 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 14:58:36,939 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:58:36,939 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:58:36,939 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:58:36,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:58:36,940 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:58:36,940 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:58:36,940 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:58:36,941 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:58:36,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:58:36,941 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:58:36,941 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_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1ad2d5826e88851ec05294e79547a11a54665f4a2cf6f0e66f9eabed656148f [2022-11-23 14:58:37,221 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:58:37,248 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:58:37,251 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:58:37,252 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:58:37,252 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:58:37,254 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/termination-memory-alloca/openbsd_cstrlcpy-alloca-2.i [2022-11-23 14:58:40,407 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:58:40,664 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:58:40,665 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/sv-benchmarks/c/termination-memory-alloca/openbsd_cstrlcpy-alloca-2.i [2022-11-23 14:58:40,681 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/data/0e398b687/74bc85dde7374b92838fed5e5e503a6c/FLAG924d16aa2 [2022-11-23 14:58:40,695 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/data/0e398b687/74bc85dde7374b92838fed5e5e503a6c [2022-11-23 14:58:40,697 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:58:40,699 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:58:40,700 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:58:40,701 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:58:40,704 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:58:40,705 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:58:40" (1/1) ... [2022-11-23 14:58:40,706 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14551711 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:40, skipping insertion in model container [2022-11-23 14:58:40,706 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:58:40" (1/1) ... [2022-11-23 14:58:40,713 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:58:40,744 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:58:40,988 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:58:41,005 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:58:41,077 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:58:41,107 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:58:41,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:41 WrapperNode [2022-11-23 14:58:41,108 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:58:41,109 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:58:41,110 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:58:41,110 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:58:41,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:41" (1/1) ... [2022-11-23 14:58:41,152 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:41" (1/1) ... [2022-11-23 14:58:41,183 INFO L138 Inliner]: procedures = 111, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 78 [2022-11-23 14:58:41,184 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:58:41,184 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:58:41,185 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:58:41,185 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:58:41,194 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:41" (1/1) ... [2022-11-23 14:58:41,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:41" (1/1) ... [2022-11-23 14:58:41,204 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:41" (1/1) ... [2022-11-23 14:58:41,205 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:41" (1/1) ... [2022-11-23 14:58:41,220 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:41" (1/1) ... [2022-11-23 14:58:41,226 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:41" (1/1) ... [2022-11-23 14:58:41,230 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:41" (1/1) ... [2022-11-23 14:58:41,237 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:41" (1/1) ... [2022-11-23 14:58:41,240 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:58:41,241 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:58:41,243 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:58:41,244 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:58:41,244 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:41" (1/1) ... [2022-11-23 14:58:41,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:58:41,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:58:41,274 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:58:41,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:58:41,318 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 14:58:41,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 14:58:41,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 14:58:41,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 14:58:41,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:58:41,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:58:41,426 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:58:41,429 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:58:41,764 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:58:41,883 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:58:41,884 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-23 14:58:41,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:58:41 BoogieIcfgContainer [2022-11-23 14:58:41,886 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:58:41,889 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:58:41,889 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:58:41,893 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:58:41,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:58:40" (1/3) ... [2022-11-23 14:58:41,894 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52cc5fab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:58:41, skipping insertion in model container [2022-11-23 14:58:41,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:41" (2/3) ... [2022-11-23 14:58:41,894 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52cc5fab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:58:41, skipping insertion in model container [2022-11-23 14:58:41,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:58:41" (3/3) ... [2022-11-23 14:58:41,896 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrlcpy-alloca-2.i [2022-11-23 14:58:41,915 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:58:41,915 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2022-11-23 14:58:41,983 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:58:41,993 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;@771da814, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:58:41,993 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2022-11-23 14:58:41,997 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 17 states have (on average 2.235294117647059) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:58:42,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-23 14:58:42,005 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:58:42,006 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-23 14:58:42,007 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-23 14:58:42,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:58:42,015 INFO L85 PathProgramCache]: Analyzing trace with hash 4016, now seen corresponding path program 1 times [2022-11-23 14:58:42,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:58:42,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066657468] [2022-11-23 14:58:42,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:58:42,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:58:42,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:58:42,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:58:42,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:58:42,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066657468] [2022-11-23 14:58:42,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066657468] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:58:42,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:58:42,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 14:58:42,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496933199] [2022-11-23 14:58:42,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:58:42,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:58:42,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:58:42,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:58:42,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:58:42,570 INFO L87 Difference]: Start difference. First operand has 31 states, 17 states have (on average 2.235294117647059) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 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) [2022-11-23 14:58:42,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:58:42,638 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2022-11-23 14:58:42,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:58:42,641 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 [2022-11-23 14:58:42,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:58:42,649 INFO L225 Difference]: With dead ends: 30 [2022-11-23 14:58:42,649 INFO L226 Difference]: Without dead ends: 29 [2022-11-23 14:58:42,651 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 [2022-11-23 14:58:42,657 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 31 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 20 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 [2022-11-23 14:58:42,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 20 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:58:42,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-23 14:58:42,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-23 14:58:42,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 2.0) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:58:42,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-11-23 14:58:42,697 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 2 [2022-11-23 14:58:42,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:58:42,698 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-11-23 14:58:42,698 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) [2022-11-23 14:58:42,700 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-11-23 14:58:42,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-23 14:58:42,700 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:58:42,701 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-23 14:58:42,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:58:42,702 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-23 14:58:42,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:58:42,703 INFO L85 PathProgramCache]: Analyzing trace with hash 4017, now seen corresponding path program 1 times [2022-11-23 14:58:42,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:58:42,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172005125] [2022-11-23 14:58:42,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:58:42,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:58:42,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:58:43,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:58:43,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:58:43,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172005125] [2022-11-23 14:58:43,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172005125] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:58:43,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:58:43,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 14:58:43,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815324880] [2022-11-23 14:58:43,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:58:43,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:58:43,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:58:43,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:58:43,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:58:43,025 INFO L87 Difference]: Start difference. First operand 29 states and 34 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) [2022-11-23 14:58:43,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:58:43,057 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2022-11-23 14:58:43,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:58:43,058 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 [2022-11-23 14:58:43,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:58:43,059 INFO L225 Difference]: With dead ends: 28 [2022-11-23 14:58:43,059 INFO L226 Difference]: Without dead ends: 28 [2022-11-23 14:58:43,060 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 [2022-11-23 14:58:43,064 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 32 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:58:43,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 20 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:58:43,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-23 14:58:43,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-23 14:58:43,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:58:43,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-11-23 14:58:43,072 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 2 [2022-11-23 14:58:43,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:58:43,072 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-11-23 14:58:43,072 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) [2022-11-23 14:58:43,072 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-11-23 14:58:43,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-23 14:58:43,073 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:58:43,073 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-23 14:58:43,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 14:58:43,074 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-23 14:58:43,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:58:43,074 INFO L85 PathProgramCache]: Analyzing trace with hash 124485, now seen corresponding path program 1 times [2022-11-23 14:58:43,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:58:43,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984800813] [2022-11-23 14:58:43,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:58:43,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:58:43,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:58:43,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:58:43,161 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:58:43,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984800813] [2022-11-23 14:58:43,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984800813] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:58:43,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:58:43,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 14:58:43,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97152313] [2022-11-23 14:58:43,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:58:43,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:58:43,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:58:43,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:58:43,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:58:43,166 INFO L87 Difference]: Start difference. First operand 28 states and 33 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) [2022-11-23 14:58:43,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:58:43,202 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2022-11-23 14:58:43,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:58:43,203 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 [2022-11-23 14:58:43,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:58:43,204 INFO L225 Difference]: With dead ends: 27 [2022-11-23 14:58:43,204 INFO L226 Difference]: Without dead ends: 27 [2022-11-23 14:58:43,205 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 [2022-11-23 14:58:43,206 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 28 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 19 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 [2022-11-23 14:58:43,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 19 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:58:43,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-23 14:58:43,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-23 14:58:43,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 26 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) [2022-11-23 14:58:43,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-11-23 14:58:43,211 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 3 [2022-11-23 14:58:43,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:58:43,212 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-11-23 14:58:43,212 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) [2022-11-23 14:58:43,212 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-11-23 14:58:43,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-23 14:58:43,213 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:58:43,213 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-23 14:58:43,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 14:58:43,214 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-23 14:58:43,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:58:43,214 INFO L85 PathProgramCache]: Analyzing trace with hash 124486, now seen corresponding path program 1 times [2022-11-23 14:58:43,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:58:43,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470125988] [2022-11-23 14:58:43,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:58:43,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:58:43,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:58:43,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:58:43,352 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:58:43,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470125988] [2022-11-23 14:58:43,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470125988] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:58:43,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:58:43,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 14:58:43,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338839072] [2022-11-23 14:58:43,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:58:43,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:58:43,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:58:43,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:58:43,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:58:43,355 INFO L87 Difference]: Start difference. First operand 27 states and 32 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) [2022-11-23 14:58:43,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:58:43,386 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2022-11-23 14:58:43,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:58:43,387 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 [2022-11-23 14:58:43,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:58:43,388 INFO L225 Difference]: With dead ends: 26 [2022-11-23 14:58:43,388 INFO L226 Difference]: Without dead ends: 26 [2022-11-23 14:58:43,389 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 [2022-11-23 14:58:43,390 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:58:43,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 19 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:58:43,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-23 14:58:43,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-23 14:58:43,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 25 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) [2022-11-23 14:58:43,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-11-23 14:58:43,395 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 3 [2022-11-23 14:58:43,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:58:43,396 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-11-23 14:58:43,396 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) [2022-11-23 14:58:43,396 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-11-23 14:58:43,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 14:58:43,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:58:43,397 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:58:43,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 14:58:43,398 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-23 14:58:43,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:58:43,399 INFO L85 PathProgramCache]: Analyzing trace with hash -932435257, now seen corresponding path program 1 times [2022-11-23 14:58:43,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:58:43,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471813785] [2022-11-23 14:58:43,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:58:43,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:58:43,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:58:43,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:58:43,453 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:58:43,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471813785] [2022-11-23 14:58:43,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471813785] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:58:43,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:58:43,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:58:43,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591167001] [2022-11-23 14:58:43,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:58:43,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:58:43,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:58:43,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:58:43,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:58:43,460 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2022-11-23 14:58:43,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:58:43,493 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-11-23 14:58:43,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:58:43,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 [2022-11-23 14:58:43,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:58:43,496 INFO L225 Difference]: With dead ends: 30 [2022-11-23 14:58:43,497 INFO L226 Difference]: Without dead ends: 30 [2022-11-23 14:58:43,497 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 [2022-11-23 14:58:43,499 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 14 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:58:43,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 40 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:58:43,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-23 14:58:43,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2022-11-23 14:58:43,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 26 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) [2022-11-23 14:58:43,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-11-23 14:58:43,520 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 7 [2022-11-23 14:58:43,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:58:43,521 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-11-23 14:58:43,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2022-11-23 14:58:43,523 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-11-23 14:58:43,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 14:58:43,524 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:58:43,528 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:58:43,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 14:58:43,529 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-23 14:58:43,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:58:43,532 INFO L85 PathProgramCache]: Analyzing trace with hash -932461262, now seen corresponding path program 1 times [2022-11-23 14:58:43,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:58:43,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070584462] [2022-11-23 14:58:43,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:58:43,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:58:43,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:58:43,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:58:43,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:58:43,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070584462] [2022-11-23 14:58:43,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070584462] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:58:43,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:58:43,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:58:43,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505026832] [2022-11-23 14:58:43,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:58:43,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:58:43,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:58:43,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:58:43,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:58:43,653 INFO L87 Difference]: Start difference. First operand 27 states and 32 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) [2022-11-23 14:58:43,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:58:43,715 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2022-11-23 14:58:43,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:58:43,715 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 [2022-11-23 14:58:43,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:58:43,716 INFO L225 Difference]: With dead ends: 26 [2022-11-23 14:58:43,716 INFO L226 Difference]: Without dead ends: 26 [2022-11-23 14:58:43,717 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 [2022-11-23 14:58:43,718 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 47 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:58:43,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 17 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:58:43,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-23 14:58:43,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-23 14:58:43,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 25 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) [2022-11-23 14:58:43,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-11-23 14:58:43,728 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 7 [2022-11-23 14:58:43,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:58:43,729 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-11-23 14:58:43,729 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) [2022-11-23 14:58:43,729 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-11-23 14:58:43,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 14:58:43,730 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:58:43,730 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:58:43,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 14:58:43,731 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-23 14:58:43,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:58:43,732 INFO L85 PathProgramCache]: Analyzing trace with hash -932461261, now seen corresponding path program 1 times [2022-11-23 14:58:43,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:58:43,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246369158] [2022-11-23 14:58:43,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:58:43,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:58:43,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:58:43,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:58:43,900 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:58:43,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246369158] [2022-11-23 14:58:43,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246369158] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:58:43,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:58:43,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:58:43,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728295352] [2022-11-23 14:58:43,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:58:43,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:58:43,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:58:43,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:58:43,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:58:43,903 INFO L87 Difference]: Start difference. First operand 26 states and 31 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) [2022-11-23 14:58:43,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:58:43,968 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2022-11-23 14:58:43,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:58:43,968 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 [2022-11-23 14:58:43,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:58:43,969 INFO L225 Difference]: With dead ends: 39 [2022-11-23 14:58:43,969 INFO L226 Difference]: Without dead ends: 39 [2022-11-23 14:58:43,969 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 [2022-11-23 14:58:43,972 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 103 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:58:43,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 32 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:58:43,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-23 14:58:43,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2022-11-23 14:58:43,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 30 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) [2022-11-23 14:58:43,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2022-11-23 14:58:43,983 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 7 [2022-11-23 14:58:43,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:58:43,983 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2022-11-23 14:58:43,984 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) [2022-11-23 14:58:43,984 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2022-11-23 14:58:43,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 14:58:43,984 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:58:43,985 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:58:43,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 14:58:43,985 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-23 14:58:43,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:58:43,986 INFO L85 PathProgramCache]: Analyzing trace with hash -933260589, now seen corresponding path program 1 times [2022-11-23 14:58:43,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:58:43,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006857062] [2022-11-23 14:58:43,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:58:43,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:58:44,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:58:44,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:58:44,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:58:44,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006857062] [2022-11-23 14:58:44,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006857062] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:58:44,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:58:44,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:58:44,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137915467] [2022-11-23 14:58:44,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:58:44,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:58:44,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:58:44,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:58:44,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:58:44,084 INFO L87 Difference]: Start difference. First operand 31 states and 39 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) [2022-11-23 14:58:44,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:58:44,124 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2022-11-23 14:58:44,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:58:44,125 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 [2022-11-23 14:58:44,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:58:44,126 INFO L225 Difference]: With dead ends: 30 [2022-11-23 14:58:44,126 INFO L226 Difference]: Without dead ends: 30 [2022-11-23 14:58:44,127 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 [2022-11-23 14:58:44,127 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 25 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:58:44,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 29 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:58:44,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-23 14:58:44,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-23 14:58:44,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:58:44,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-11-23 14:58:44,132 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 7 [2022-11-23 14:58:44,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:58:44,132 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-11-23 14:58:44,132 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) [2022-11-23 14:58:44,132 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-11-23 14:58:44,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 14:58:44,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:58:44,133 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:58:44,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 14:58:44,133 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-23 14:58:44,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:58:44,134 INFO L85 PathProgramCache]: Analyzing trace with hash -933260588, now seen corresponding path program 1 times [2022-11-23 14:58:44,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:58:44,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292424] [2022-11-23 14:58:44,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:58:44,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:58:44,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:58:44,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:58:44,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:58:44,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292424] [2022-11-23 14:58:44,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292424] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:58:44,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:58:44,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:58:44,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121777689] [2022-11-23 14:58:44,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:58:44,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:58:44,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:58:44,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:58:44,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:58:44,294 INFO L87 Difference]: Start difference. First operand 30 states and 38 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) [2022-11-23 14:58:44,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:58:44,374 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2022-11-23 14:58:44,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:58:44,374 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 [2022-11-23 14:58:44,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:58:44,377 INFO L225 Difference]: With dead ends: 35 [2022-11-23 14:58:44,377 INFO L226 Difference]: Without dead ends: 35 [2022-11-23 14:58:44,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:58:44,379 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 52 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:58:44,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 45 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:58:44,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-23 14:58:44,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2022-11-23 14:58:44,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 24 states have (on average 1.625) internal successors, (39), 30 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) [2022-11-23 14:58:44,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2022-11-23 14:58:44,395 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 7 [2022-11-23 14:58:44,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:58:44,395 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2022-11-23 14:58:44,396 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) [2022-11-23 14:58:44,396 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2022-11-23 14:58:44,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 14:58:44,396 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:58:44,396 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:58:44,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 14:58:44,397 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-23 14:58:44,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:58:44,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1158477073, now seen corresponding path program 1 times [2022-11-23 14:58:44,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:58:44,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691969017] [2022-11-23 14:58:44,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:58:44,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:58:44,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:58:44,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:58:44,465 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:58:44,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691969017] [2022-11-23 14:58:44,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691969017] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:58:44,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:58:44,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:58:44,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608765245] [2022-11-23 14:58:44,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:58:44,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:58:44,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:58:44,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:58:44,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:58:44,468 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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) [2022-11-23 14:58:44,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:58:44,515 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2022-11-23 14:58:44,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:58:44,516 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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 [2022-11-23 14:58:44,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:58:44,516 INFO L225 Difference]: With dead ends: 30 [2022-11-23 14:58:44,516 INFO L226 Difference]: Without dead ends: 30 [2022-11-23 14:58:44,517 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 [2022-11-23 14:58:44,517 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 20 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:58:44,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 30 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:58:44,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-23 14:58:44,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-23 14:58:44,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:58:44,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-11-23 14:58:44,520 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 8 [2022-11-23 14:58:44,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:58:44,521 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-11-23 14:58:44,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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) [2022-11-23 14:58:44,521 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-11-23 14:58:44,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 14:58:44,522 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:58:44,522 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:58:44,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 14:58:44,522 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-23 14:58:44,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:58:44,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1158477074, now seen corresponding path program 1 times [2022-11-23 14:58:44,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:58:44,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845656045] [2022-11-23 14:58:44,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:58:44,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:58:44,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:58:44,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:58:44,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:58:44,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845656045] [2022-11-23 14:58:44,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845656045] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:58:44,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:58:44,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:58:44,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938324138] [2022-11-23 14:58:44,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:58:44,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:58:44,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:58:44,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:58:44,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:58:44,708 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2022-11-23 14:58:44,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:58:44,802 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2022-11-23 14:58:44,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:58:44,802 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 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 [2022-11-23 14:58:44,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:58:44,803 INFO L225 Difference]: With dead ends: 35 [2022-11-23 14:58:44,803 INFO L226 Difference]: Without dead ends: 35 [2022-11-23 14:58:44,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:58:44,804 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 47 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:58:44,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 38 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:58:44,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-23 14:58:44,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2022-11-23 14:58:44,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:58:44,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2022-11-23 14:58:44,811 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 8 [2022-11-23 14:58:44,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:58:44,811 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2022-11-23 14:58:44,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2022-11-23 14:58:44,811 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2022-11-23 14:58:44,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 14:58:44,812 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:58:44,813 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:58:44,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 14:58:44,815 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-23 14:58:44,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:58:44,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1133692822, now seen corresponding path program 1 times [2022-11-23 14:58:44,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:58:44,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633916910] [2022-11-23 14:58:44,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:58:44,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:58:44,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:58:44,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:58:44,903 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:58:44,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633916910] [2022-11-23 14:58:44,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633916910] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:58:44,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:58:44,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:58:44,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368292285] [2022-11-23 14:58:44,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:58:44,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:58:44,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:58:44,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:58:44,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:58:44,905 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 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) [2022-11-23 14:58:44,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:58:44,958 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2022-11-23 14:58:44,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:58:44,959 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 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 [2022-11-23 14:58:44,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:58:44,960 INFO L225 Difference]: With dead ends: 31 [2022-11-23 14:58:44,960 INFO L226 Difference]: Without dead ends: 31 [2022-11-23 14:58:44,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:58:44,961 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 45 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:58:44,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 28 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:58:44,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-23 14:58:44,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-23 14:58:44,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.5) internal successors, (39), 30 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) [2022-11-23 14:58:44,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2022-11-23 14:58:44,966 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 8 [2022-11-23 14:58:44,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:58:44,966 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2022-11-23 14:58:44,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 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) [2022-11-23 14:58:44,967 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2022-11-23 14:58:44,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 14:58:44,967 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:58:44,967 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:58:44,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 14:58:44,968 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-23 14:58:44,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:58:44,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1133692823, now seen corresponding path program 1 times [2022-11-23 14:58:44,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:58:44,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064168565] [2022-11-23 14:58:44,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:58:44,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:58:45,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:58:45,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:58:45,162 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:58:45,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064168565] [2022-11-23 14:58:45,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064168565] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:58:45,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:58:45,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:58:45,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740173287] [2022-11-23 14:58:45,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:58:45,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:58:45,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:58:45,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:58:45,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:58:45,165 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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) [2022-11-23 14:58:45,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:58:45,244 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2022-11-23 14:58:45,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:58:45,244 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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 [2022-11-23 14:58:45,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:58:45,245 INFO L225 Difference]: With dead ends: 40 [2022-11-23 14:58:45,245 INFO L226 Difference]: Without dead ends: 40 [2022-11-23 14:58:45,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:58:45,247 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 104 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:58:45,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 38 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:58:45,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-23 14:58:45,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2022-11-23 14:58:45,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:58:45,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2022-11-23 14:58:45,260 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 8 [2022-11-23 14:58:45,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:58:45,261 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2022-11-23 14:58:45,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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) [2022-11-23 14:58:45,261 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2022-11-23 14:58:45,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 14:58:45,262 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:58:45,262 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:58:45,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 14:58:45,263 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-23 14:58:45,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:58:45,263 INFO L85 PathProgramCache]: Analyzing trace with hash 784724414, now seen corresponding path program 1 times [2022-11-23 14:58:45,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:58:45,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478128587] [2022-11-23 14:58:45,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:58:45,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:58:45,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:58:45,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:58:45,449 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:58:45,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478128587] [2022-11-23 14:58:45,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478128587] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:58:45,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:58:45,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:58:45,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557325409] [2022-11-23 14:58:45,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:58:45,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:58:45,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:58:45,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:58:45,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:58:45,452 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:58:45,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:58:45,474 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2022-11-23 14:58:45,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:58:45,475 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-23 14:58:45,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:58:45,476 INFO L225 Difference]: With dead ends: 31 [2022-11-23 14:58:45,476 INFO L226 Difference]: Without dead ends: 29 [2022-11-23 14:58:45,476 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 [2022-11-23 14:58:45,477 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 36 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 [2022-11-23 14:58:45,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 36 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:58:45,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-23 14:58:45,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-11-23 14:58:45,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 27 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:58:45,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-11-23 14:58:45,480 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 9 [2022-11-23 14:58:45,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:58:45,481 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-11-23 14:58:45,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:58:45,481 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-11-23 14:58:45,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 14:58:45,481 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:58:45,482 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:58:45,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-23 14:58:45,482 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-23 14:58:45,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:58:45,483 INFO L85 PathProgramCache]: Analyzing trace with hash 2128303807, now seen corresponding path program 1 times [2022-11-23 14:58:45,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:58:45,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083686833] [2022-11-23 14:58:45,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:58:45,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:58:45,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:58:45,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:58:45,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:58:45,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083686833] [2022-11-23 14:58:45,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083686833] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:58:45,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:58:45,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:58:45,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311146033] [2022-11-23 14:58:45,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:58:45,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:58:45,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:58:45,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:58:45,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:58:45,736 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 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) [2022-11-23 14:58:45,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:58:45,804 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2022-11-23 14:58:45,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:58:45,805 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 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 11 [2022-11-23 14:58:45,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:58:45,805 INFO L225 Difference]: With dead ends: 28 [2022-11-23 14:58:45,805 INFO L226 Difference]: Without dead ends: 28 [2022-11-23 14:58:45,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:58:45,807 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 44 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:58:45,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 15 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:58:45,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-23 14:58:45,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-23 14:58:45,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.375) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:58:45,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-11-23 14:58:45,810 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 11 [2022-11-23 14:58:45,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:58:45,811 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-11-23 14:58:45,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 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) [2022-11-23 14:58:45,811 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-11-23 14:58:45,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 14:58:45,812 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:58:45,812 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:58:45,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-23 14:58:45,813 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-23 14:58:45,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:58:45,813 INFO L85 PathProgramCache]: Analyzing trace with hash 656395043, now seen corresponding path program 1 times [2022-11-23 14:58:45,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:58:45,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147935261] [2022-11-23 14:58:45,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:58:45,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:58:45,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:58:46,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:58:46,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:58:46,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147935261] [2022-11-23 14:58:46,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147935261] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:58:46,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:58:46,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 14:58:46,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218165358] [2022-11-23 14:58:46,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:58:46,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:58:46,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:58:46,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:58:46,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:58:46,167 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 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) [2022-11-23 14:58:46,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:58:46,376 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2022-11-23 14:58:46,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:58:46,377 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 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 [2022-11-23 14:58:46,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:58:46,377 INFO L225 Difference]: With dead ends: 38 [2022-11-23 14:58:46,378 INFO L226 Difference]: Without dead ends: 38 [2022-11-23 14:58:46,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:58:46,378 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 42 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:58:46,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 51 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:58:46,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-23 14:58:46,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2022-11-23 14:58:46,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.4) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:58:46,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2022-11-23 14:58:46,381 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 12 [2022-11-23 14:58:46,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:58:46,381 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2022-11-23 14:58:46,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 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) [2022-11-23 14:58:46,381 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2022-11-23 14:58:46,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 14:58:46,382 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:58:46,382 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:58:46,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-23 14:58:46,383 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-23 14:58:46,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:58:46,384 INFO L85 PathProgramCache]: Analyzing trace with hash 656429864, now seen corresponding path program 1 times [2022-11-23 14:58:46,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:58:46,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493413004] [2022-11-23 14:58:46,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:58:46,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:58:46,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:58:46,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:58:46,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:58:46,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493413004] [2022-11-23 14:58:46,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493413004] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:58:46,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35634341] [2022-11-23 14:58:46,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:58:46,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:58:46,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:58:46,812 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:58:46,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:58:46,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:58:46,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-23 14:58:46,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:58:47,037 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 [2022-11-23 14:58:47,269 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:58:47,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 15 [2022-11-23 14:58:47,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:58:47,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:58:47,700 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 [2022-11-23 14:58:47,706 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 [2022-11-23 14:58:47,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-23 14:58:47,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:58:47,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35634341] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:58:47,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1406607037] [2022-11-23 14:58:47,758 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 14:58:47,758 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:58:47,762 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:58:47,768 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:58:47,769 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:58:47,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:58:47,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-23 14:58:47,894 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 [2022-11-23 14:58:47,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:58:47,955 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 [2022-11-23 14:58:48,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:58:48,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:58:48,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:58:48,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:58:48,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:58:48,183 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-23 14:58:48,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 44 [2022-11-23 14:58:48,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 14:58:48,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 14:58:49,002 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:58:51,057 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1199#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (= (+ |ULTIMATE.start_cstrlcpy_#t~post4#1.offset| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| (+ |ULTIMATE.start_cstrlcpy_#t~post3#1.offset| 1)) (= |ULTIMATE.start_cstrlcpy_~s~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post4#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post4#1.offset|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post4#1.base|) (= |ULTIMATE.start_cstrlcpy_~d~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-23 14:58:51,057 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:58:51,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:58:51,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2022-11-23 14:58:51,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232293212] [2022-11-23 14:58:51,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:58:51,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-23 14:58:51,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:58:51,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-23 14:58:51,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2022-11-23 14:58:51,059 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:58:51,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:58:51,674 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2022-11-23 14:58:51,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 14:58:51,675 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 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 [2022-11-23 14:58:51,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:58:51,675 INFO L225 Difference]: With dead ends: 42 [2022-11-23 14:58:51,676 INFO L226 Difference]: Without dead ends: 42 [2022-11-23 14:58:51,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=176, Invalid=1014, Unknown=0, NotChecked=0, Total=1190 [2022-11-23 14:58:51,677 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 140 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:58:51,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 113 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:58:51,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-23 14:58:51,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2022-11-23 14:58:51,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 34 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:58:51,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2022-11-23 14:58:51,679 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 12 [2022-11-23 14:58:51,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:58:51,679 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2022-11-23 14:58:51,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:58:51,679 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2022-11-23 14:58:51,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-23 14:58:51,680 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:58:51,680 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:58:51,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 14:58:51,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:58:51,881 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-23 14:58:51,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:58:51,881 INFO L85 PathProgramCache]: Analyzing trace with hash 75156022, now seen corresponding path program 1 times [2022-11-23 14:58:51,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:58:51,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706445625] [2022-11-23 14:58:51,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:58:51,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:58:51,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:58:52,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:58:52,002 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:58:52,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706445625] [2022-11-23 14:58:52,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706445625] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:58:52,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:58:52,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:58:52,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734907068] [2022-11-23 14:58:52,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:58:52,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:58:52,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:58:52,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:58:52,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:58:52,005 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-23 14:58:52,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:58:52,023 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2022-11-23 14:58:52,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:58:52,024 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 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 13 [2022-11-23 14:58:52,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:58:52,026 INFO L225 Difference]: With dead ends: 35 [2022-11-23 14:58:52,027 INFO L226 Difference]: Without dead ends: 35 [2022-11-23 14:58:52,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:58:52,028 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 16 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:58:52,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 47 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:58:52,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-23 14:58:52,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-11-23 14:58:52,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:58:52,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2022-11-23 14:58:52,033 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 13 [2022-11-23 14:58:52,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:58:52,034 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2022-11-23 14:58:52,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-23 14:58:52,034 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2022-11-23 14:58:52,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-23 14:58:52,035 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:58:52,035 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:58:52,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-23 14:58:52,035 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-23 14:58:52,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:58:52,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1125510717, now seen corresponding path program 1 times [2022-11-23 14:58:52,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:58:52,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408763181] [2022-11-23 14:58:52,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:58:52,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:58:52,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:58:52,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:58:52,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:58:52,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408763181] [2022-11-23 14:58:52,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408763181] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:58:52,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521053921] [2022-11-23 14:58:52,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:58:52,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:58:52,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:58:52,423 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:58:52,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 14:58:52,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:58:52,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-23 14:58:52,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:58:52,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:58:52,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:58:52,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-23 14:58:52,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:58:52,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521053921] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:58:52,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [187385126] [2022-11-23 14:58:52,972 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 14:58:52,972 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:58:52,972 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:58:52,973 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:58:52,973 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:58:53,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:58:53,008 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 [2022-11-23 14:58:53,036 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 [2022-11-23 14:58:53,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:58:53,091 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 [2022-11-23 14:58:53,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:58:53,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:58:53,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:58:53,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:58:53,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:58:53,259 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-23 14:58:53,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 44 [2022-11-23 14:58:53,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 14:58:53,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 14:58:53,830 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:58:56,099 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1467#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post3#1.offset| 1)) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post4#1.base|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-23 14:58:56,100 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:58:56,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:58:56,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2022-11-23 14:58:56,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673606902] [2022-11-23 14:58:56,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:58:56,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-23 14:58:56,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:58:56,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-23 14:58:56,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2022-11-23 14:58:56,102 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 21 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:58:56,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:58:56,681 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2022-11-23 14:58:56,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 14:58:56,682 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 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 [2022-11-23 14:58:56,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:58:56,682 INFO L225 Difference]: With dead ends: 41 [2022-11-23 14:58:56,682 INFO L226 Difference]: Without dead ends: 41 [2022-11-23 14:58:56,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=239, Invalid=1167, Unknown=0, NotChecked=0, Total=1406 [2022-11-23 14:58:56,683 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 139 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:58:56,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 104 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:58:56,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-23 14:58:56,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2022-11-23 14:58:56,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 32 states have (on average 1.28125) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:58:56,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-11-23 14:58:56,685 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 13 [2022-11-23 14:58:56,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:58:56,686 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-11-23 14:58:56,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:58:56,686 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-11-23 14:58:56,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-23 14:58:56,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:58:56,687 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:58:56,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 14:58:56,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:58:56,895 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-23 14:58:56,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:58:56,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1928498822, now seen corresponding path program 1 times [2022-11-23 14:58:56,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:58:56,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197599212] [2022-11-23 14:58:56,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:58:56,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:58:56,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:58:57,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:58:57,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:58:57,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197599212] [2022-11-23 14:58:57,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197599212] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:58:57,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047711413] [2022-11-23 14:58:57,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:58:57,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:58:57,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:58:57,327 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:58:57,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 14:58:57,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:58:57,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-23 14:58:57,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:58:57,427 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 [2022-11-23 14:58:57,461 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 [2022-11-23 14:58:57,608 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 [2022-11-23 14:58:57,715 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:58:57,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 15 [2022-11-23 14:58:57,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:58:57,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:58:58,147 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:58:58,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2022-11-23 14:58:58,159 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:58:58,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 30 [2022-11-23 14:58:58,167 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 [2022-11-23 14:58:58,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-23 14:58:58,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:58:58,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047711413] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:58:58,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1818047684] [2022-11-23 14:58:58,232 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-23 14:58:58,232 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:58:58,232 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:58:58,233 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:58:58,233 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:58:58,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:58:58,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-23 14:58:58,303 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 [2022-11-23 14:58:58,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:58:58,379 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 [2022-11-23 14:58:58,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:58:58,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:58:58,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:58:58,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-23 14:58:58,711 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:59:01,492 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1670#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~n~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (= |ULTIMATE.start_cstrlcpy_~s~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (= (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-23 14:59:01,492 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:59:01,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:59:01,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2022-11-23 14:59:01,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443728465] [2022-11-23 14:59:01,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:59:01,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-23 14:59:01,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:59:01,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-23 14:59:01,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=847, Unknown=1, NotChecked=0, Total=992 [2022-11-23 14:59:01,494 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:59:02,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:59:02,199 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2022-11-23 14:59:02,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 14:59:02,200 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 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 14 [2022-11-23 14:59:02,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:59:02,200 INFO L225 Difference]: With dead ends: 40 [2022-11-23 14:59:02,200 INFO L226 Difference]: Without dead ends: 40 [2022-11-23 14:59:02,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=228, Invalid=1253, Unknown=1, NotChecked=0, Total=1482 [2022-11-23 14:59:02,202 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 101 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:59:02,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 76 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:59:02,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-23 14:59:02,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-11-23 14:59:02,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:59:02,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2022-11-23 14:59:02,204 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 14 [2022-11-23 14:59:02,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:59:02,205 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2022-11-23 14:59:02,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:59:02,205 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2022-11-23 14:59:02,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-23 14:59:02,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:59:02,206 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:59:02,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-23 14:59:02,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:59:02,412 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-23 14:59:02,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:59:02,412 INFO L85 PathProgramCache]: Analyzing trace with hash -564555932, now seen corresponding path program 1 times [2022-11-23 14:59:02,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:59:02,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964238105] [2022-11-23 14:59:02,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:59:02,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:59:02,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:59:02,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:59:02,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:59:02,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964238105] [2022-11-23 14:59:02,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964238105] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:59:02,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:59:02,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 14:59:02,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831513374] [2022-11-23 14:59:02,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:59:02,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:59:02,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:59:02,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:59:02,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:59:02,646 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:59:02,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:59:02,726 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2022-11-23 14:59:02,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:59:02,726 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2022-11-23 14:59:02,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:59:02,727 INFO L225 Difference]: With dead ends: 41 [2022-11-23 14:59:02,727 INFO L226 Difference]: Without dead ends: 39 [2022-11-23 14:59:02,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-11-23 14:59:02,728 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 32 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:59:02,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 34 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:59:02,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-23 14:59:02,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-11-23 14:59:02,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.2) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:59:02,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-11-23 14:59:02,729 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 14 [2022-11-23 14:59:02,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:59:02,730 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-11-23 14:59:02,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:59:02,731 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-11-23 14:59:02,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-23 14:59:02,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:59:02,731 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:59:02,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-23 14:59:02,732 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-23 14:59:02,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:59:02,732 INFO L85 PathProgramCache]: Analyzing trace with hash 680763647, now seen corresponding path program 1 times [2022-11-23 14:59:02,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:59:02,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134779468] [2022-11-23 14:59:02,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:59:02,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:59:02,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:59:03,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:59:03,149 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:59:03,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134779468] [2022-11-23 14:59:03,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134779468] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:59:03,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909603722] [2022-11-23 14:59:03,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:59:03,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:59:03,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:59:03,155 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:59:03,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 14:59:03,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:59:03,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-23 14:59:03,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:59:03,294 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 [2022-11-23 14:59:03,439 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:59:03,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2022-11-23 14:59:03,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:59:03,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:59:03,847 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 [2022-11-23 14:59:03,853 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 [2022-11-23 14:59:03,859 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 [2022-11-23 14:59:03,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:59:03,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909603722] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:59:03,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1201801104] [2022-11-23 14:59:03,882 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 14:59:03,882 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:59:03,882 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:59:03,883 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:59:03,883 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:59:03,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:03,931 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 [2022-11-23 14:59:03,954 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 [2022-11-23 14:59:04,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:04,030 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 [2022-11-23 14:59:04,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:04,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:04,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:04,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:04,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:04,293 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-23 14:59:04,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 44 [2022-11-23 14:59:04,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 14:59:04,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 14:59:04,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 14:59:04,821 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:59:08,065 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1974#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= (+ |ULTIMATE.start_cstrlcpy_~d~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrlcpy_~d~0#1.base|)) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (= (mod |ULTIMATE.start_cstrlcpy_~n~0#1| 18446744073709551616) 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (= |ULTIMATE.start_cstrlcpy_~s~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_cstrlcpy_~d~0#1.base|) |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) 0) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrlcpy_~d~0#1.base|) 1) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (= (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-23 14:59:08,066 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:59:08,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:59:08,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2022-11-23 14:59:08,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483525867] [2022-11-23 14:59:08,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:59:08,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-23 14:59:08,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:59:08,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-23 14:59:08,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2022-11-23 14:59:08,068 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:59:08,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:59:08,748 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2022-11-23 14:59:08,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 14:59:08,751 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-23 14:59:08,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:59:08,752 INFO L225 Difference]: With dead ends: 42 [2022-11-23 14:59:08,752 INFO L226 Difference]: Without dead ends: 42 [2022-11-23 14:59:08,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=230, Invalid=1330, Unknown=0, NotChecked=0, Total=1560 [2022-11-23 14:59:08,753 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 110 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:59:08,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 96 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:59:08,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-23 14:59:08,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2022-11-23 14:59:08,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.2) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:59:08,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-11-23 14:59:08,756 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 16 [2022-11-23 14:59:08,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:59:08,756 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-11-23 14:59:08,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:59:08,756 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-11-23 14:59:08,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-23 14:59:08,757 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:59:08,757 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:59:08,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 14:59:08,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:59:08,962 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-23 14:59:08,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:59:08,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1869096757, now seen corresponding path program 2 times [2022-11-23 14:59:08,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:59:08,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46970324] [2022-11-23 14:59:08,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:59:08,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:59:09,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:59:09,754 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:59:09,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:59:09,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46970324] [2022-11-23 14:59:09,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46970324] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:59:09,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124047435] [2022-11-23 14:59:09,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:59:09,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:59:09,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:59:09,756 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:59:09,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 14:59:09,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 14:59:09,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:59:09,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-23 14:59:09,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:59:09,870 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 [2022-11-23 14:59:09,908 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 [2022-11-23 14:59:10,061 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 [2022-11-23 14:59:10,402 INFO L321 Elim1Store]: treesize reduction 4, result has 81.8 percent of original size [2022-11-23 14:59:10,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2022-11-23 14:59:10,534 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:59:10,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:59:13,142 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:59:13,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 34 [2022-11-23 14:59:13,162 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:59:13,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 65 [2022-11-23 14:59:13,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2022-11-23 14:59:13,181 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 [2022-11-23 14:59:13,279 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:59:13,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124047435] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:59:13,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [737885190] [2022-11-23 14:59:13,281 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-23 14:59:13,281 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:59:13,282 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:59:13,282 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:59:13,282 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:59:13,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:13,314 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 [2022-11-23 14:59:13,336 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 [2022-11-23 14:59:13,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:13,375 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 [2022-11-23 14:59:13,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:13,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:13,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:13,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-23 14:59:13,680 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:59:16,730 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2212#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~n~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (= |ULTIMATE.start_cstrlcpy_~s~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (= (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-23 14:59:16,730 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:59:16,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:59:16,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2022-11-23 14:59:16,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079067805] [2022-11-23 14:59:16,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:59:16,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-23 14:59:16,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:59:16,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-23 14:59:16,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1435, Unknown=1, NotChecked=0, Total=1640 [2022-11-23 14:59:16,733 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 32 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 31 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:59:18,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:59:18,637 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2022-11-23 14:59:18,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 14:59:18,637 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 31 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-23 14:59:18,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:59:18,638 INFO L225 Difference]: With dead ends: 47 [2022-11-23 14:59:18,638 INFO L226 Difference]: Without dead ends: 47 [2022-11-23 14:59:18,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=340, Invalid=2311, Unknown=1, NotChecked=0, Total=2652 [2022-11-23 14:59:18,639 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 107 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:59:18,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 69 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:59:18,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-23 14:59:18,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-11-23 14:59:18,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 41 states have (on average 1.170731707317073) internal successors, (48), 44 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:59:18,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2022-11-23 14:59:18,641 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 17 [2022-11-23 14:59:18,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:59:18,642 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2022-11-23 14:59:18,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 31 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:59:18,642 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2022-11-23 14:59:18,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-23 14:59:18,642 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:59:18,642 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-23 14:59:18,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 14:59:18,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:59:18,843 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-23 14:59:18,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:59:18,844 INFO L85 PathProgramCache]: Analyzing trace with hash 841918292, now seen corresponding path program 2 times [2022-11-23 14:59:18,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:59:18,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354657871] [2022-11-23 14:59:18,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:59:18,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:59:18,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:59:19,588 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:59:19,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:59:19,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354657871] [2022-11-23 14:59:19,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354657871] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:59:19,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357448052] [2022-11-23 14:59:19,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:59:19,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:59:19,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:59:19,590 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:59:19,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 14:59:19,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 14:59:19,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:59:19,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-23 14:59:19,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:59:19,732 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 [2022-11-23 14:59:19,771 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 [2022-11-23 14:59:19,999 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 24 treesize of output 24 [2022-11-23 14:59:24,379 INFO L321 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2022-11-23 14:59:24,379 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 28 treesize of output 39 [2022-11-23 14:59:24,630 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:59:24,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:59:30,926 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:59:30,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 36 [2022-11-23 14:59:30,934 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 38 treesize of output 34 [2022-11-23 14:59:30,953 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:59:30,953 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 47 treesize of output 51 [2022-11-23 14:59:30,962 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 [2022-11-23 14:59:30,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 14:59:31,152 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:59:31,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357448052] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:59:31,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2131507184] [2022-11-23 14:59:31,154 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 14:59:31,154 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:59:31,154 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:59:31,154 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:59:31,154 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:59:31,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:31,191 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 [2022-11-23 14:59:31,223 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 [2022-11-23 14:59:31,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:31,268 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 [2022-11-23 14:59:31,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:31,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:31,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:31,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:31,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:31,387 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-23 14:59:31,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 44 [2022-11-23 14:59:31,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 14:59:31,679 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 14:59:31,837 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:59:34,078 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2462#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (= (+ |ULTIMATE.start_cstrlcpy_#t~post4#1.offset| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| (+ |ULTIMATE.start_cstrlcpy_#t~post3#1.offset| 1)) (= |ULTIMATE.start_cstrlcpy_~s~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post4#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post4#1.offset|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post4#1.base|) (= |ULTIMATE.start_cstrlcpy_~d~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-23 14:59:34,078 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:59:34,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:59:34,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2022-11-23 14:59:34,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214801664] [2022-11-23 14:59:34,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:59:34,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-23 14:59:34,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:59:34,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-23 14:59:34,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1412, Unknown=6, NotChecked=0, Total=1560 [2022-11-23 14:59:34,080 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 31 states, 30 states have (on average 1.7) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:59:36,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:59:36,403 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2022-11-23 14:59:36,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-23 14:59:36,403 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.7) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-23 14:59:36,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:59:36,404 INFO L225 Difference]: With dead ends: 58 [2022-11-23 14:59:36,404 INFO L226 Difference]: Without dead ends: 58 [2022-11-23 14:59:36,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=296, Invalid=2350, Unknown=6, NotChecked=0, Total=2652 [2022-11-23 14:59:36,406 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 189 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:59:36,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 214 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 14:59:36,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-23 14:59:36,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2022-11-23 14:59:36,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:59:36,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2022-11-23 14:59:36,408 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 17 [2022-11-23 14:59:36,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:59:36,408 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2022-11-23 14:59:36,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.7) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:59:36,409 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2022-11-23 14:59:36,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-23 14:59:36,409 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:59:36,409 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2022-11-23 14:59:36,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 14:59:36,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-23 14:59:36,611 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-23 14:59:36,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:59:36,612 INFO L85 PathProgramCache]: Analyzing trace with hash 329663255, now seen corresponding path program 2 times [2022-11-23 14:59:36,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:59:36,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812352838] [2022-11-23 14:59:36,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:59:36,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:59:36,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:59:37,352 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:59:37,352 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:59:37,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812352838] [2022-11-23 14:59:37,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812352838] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:59:37,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911783230] [2022-11-23 14:59:37,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:59:37,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:59:37,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:59:37,354 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:59:37,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 14:59:37,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 14:59:37,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:59:37,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-23 14:59:37,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:59:37,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:37,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2022-11-23 14:59:37,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-23 14:59:38,086 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:59:38,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:59:38,675 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:59:38,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911783230] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:59:38,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1658384444] [2022-11-23 14:59:38,677 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 14:59:38,677 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:59:38,677 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:59:38,678 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:59:38,678 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:59:38,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:38,707 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 [2022-11-23 14:59:38,727 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 [2022-11-23 14:59:38,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:38,764 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 [2022-11-23 14:59:38,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:38,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:38,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:38,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:38,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:38,903 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-23 14:59:38,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 44 [2022-11-23 14:59:39,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 14:59:39,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 14:59:39,381 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:59:41,574 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2734#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post3#1.offset| 1)) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post4#1.base|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-23 14:59:41,574 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:59:41,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:59:41,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 28 [2022-11-23 14:59:41,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107252582] [2022-11-23 14:59:41,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:59:41,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-23 14:59:41,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:59:41,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-23 14:59:41,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1324, Unknown=0, NotChecked=0, Total=1482 [2022-11-23 14:59:41,576 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 30 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:59:43,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:59:43,530 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2022-11-23 14:59:43,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-23 14:59:43,530 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-23 14:59:43,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:59:43,531 INFO L225 Difference]: With dead ends: 81 [2022-11-23 14:59:43,531 INFO L226 Difference]: Without dead ends: 81 [2022-11-23 14:59:43,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=449, Invalid=2857, Unknown=0, NotChecked=0, Total=3306 [2022-11-23 14:59:43,532 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 177 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:59:43,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 134 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:59:43,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-23 14:59:43,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 58. [2022-11-23 14:59:43,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 57 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:59:43,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2022-11-23 14:59:43,534 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 18 [2022-11-23 14:59:43,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:59:43,535 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2022-11-23 14:59:43,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:59:43,535 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2022-11-23 14:59:43,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-23 14:59:43,535 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:59:43,535 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:59:43,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 14:59:43,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-23 14:59:43,747 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-23 14:59:43,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:59:43,747 INFO L85 PathProgramCache]: Analyzing trace with hash -205748302, now seen corresponding path program 1 times [2022-11-23 14:59:43,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:59:43,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354715572] [2022-11-23 14:59:43,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:59:43,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:59:43,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:59:44,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:59:44,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:59:44,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354715572] [2022-11-23 14:59:44,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354715572] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:59:44,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626670629] [2022-11-23 14:59:44,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:59:44,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:59:44,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:59:44,461 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:59:44,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 14:59:44,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:59:44,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-23 14:59:44,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:59:44,578 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 [2022-11-23 14:59:44,613 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 [2022-11-23 14:59:44,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 26 [2022-11-23 14:59:45,097 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 27 treesize of output 27 [2022-11-23 14:59:45,269 INFO L321 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2022-11-23 14:59:45,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 23 [2022-11-23 14:59:45,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:59:45,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:59:48,116 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:59:48,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 36 [2022-11-23 14:59:48,122 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 38 treesize of output 34 [2022-11-23 14:59:48,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-23 14:59:48,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-11-23 14:59:48,140 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 [2022-11-23 14:59:48,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:59:48,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626670629] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:59:48,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [154273371] [2022-11-23 14:59:48,206 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-23 14:59:48,207 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:59:48,207 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:59:48,207 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:59:48,207 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:59:48,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:48,238 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 [2022-11-23 14:59:48,261 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 [2022-11-23 14:59:48,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:48,301 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 [2022-11-23 14:59:48,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:48,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:48,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:48,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:48,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:48,419 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-23 14:59:48,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 44 [2022-11-23 14:59:48,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 14:59:48,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 14:59:48,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 14:59:48,927 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:59:53,114 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3062#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= (+ |ULTIMATE.start_cstrlcpy_~d~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrlcpy_~d~0#1.base|)) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (= (mod |ULTIMATE.start_cstrlcpy_~n~0#1| 18446744073709551616) 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (= |ULTIMATE.start_cstrlcpy_~s~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_cstrlcpy_~d~0#1.base|) |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) 0) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrlcpy_~d~0#1.base|) 1) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (= (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-23 14:59:53,114 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:59:53,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:59:53,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 32 [2022-11-23 14:59:53,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970695399] [2022-11-23 14:59:53,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:59:53,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-23 14:59:53,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:59:53,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-23 14:59:53,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2050, Unknown=4, NotChecked=0, Total=2256 [2022-11-23 14:59:53,116 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand has 34 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 33 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:59:56,061 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 14:59:58,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:00:01,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:00:01,449 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2022-11-23 15:00:01,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-23 15:00:01,450 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 33 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-23 15:00:01,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:00:01,450 INFO L225 Difference]: With dead ends: 73 [2022-11-23 15:00:01,450 INFO L226 Difference]: Without dead ends: 73 [2022-11-23 15:00:01,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1457 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=490, Invalid=4603, Unknown=19, NotChecked=0, Total=5112 [2022-11-23 15:00:01,453 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 175 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 39 mSolverCounterUnsat, 16 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 16 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:00:01,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 138 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 407 Invalid, 16 Unknown, 0 Unchecked, 4.5s Time] [2022-11-23 15:00:01,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-23 15:00:01,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2022-11-23 15:00:01,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 62 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:00:01,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2022-11-23 15:00:01,460 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 19 [2022-11-23 15:00:01,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:00:01,460 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2022-11-23 15:00:01,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 33 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:00:01,461 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2022-11-23 15:00:01,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-23 15:00:01,461 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:00:01,461 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:00:01,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 15:00:01,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-23 15:00:01,667 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-23 15:00:01,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:00:01,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1631322325, now seen corresponding path program 2 times [2022-11-23 15:00:01,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:00:01,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812403651] [2022-11-23 15:00:01,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:00:01,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:00:01,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:00:02,405 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:00:02,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:00:02,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812403651] [2022-11-23 15:00:02,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812403651] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:00:02,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064950696] [2022-11-23 15:00:02,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:00:02,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:00:02,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:00:02,407 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:00:02,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 15:00:02,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 15:00:02,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:00:02,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-23 15:00:02,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:00:02,538 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 [2022-11-23 15:00:02,577 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 [2022-11-23 15:00:02,827 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 24 treesize of output 24 [2022-11-23 15:00:03,513 INFO L321 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2022-11-23 15:00:03,513 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 28 treesize of output 39 [2022-11-23 15:00:03,831 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:00:03,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:00:06,724 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:00:06,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 36 [2022-11-23 15:00:06,752 INFO L321 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-11-23 15:00:06,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 39 [2022-11-23 15:00:06,776 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:00:06,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 47 [2022-11-23 15:00:06,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:00:06,795 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 [2022-11-23 15:00:06,954 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:00:06,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064950696] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:00:06,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1382968491] [2022-11-23 15:00:06,956 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 15:00:06,956 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:00:06,956 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:00:06,956 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:00:06,957 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:00:06,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:00:06,987 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 [2022-11-23 15:00:07,012 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 [2022-11-23 15:00:07,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:00:07,057 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 [2022-11-23 15:00:07,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:00:07,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:00:07,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:00:07,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:00:07,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:00:07,179 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-23 15:00:07,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 44 [2022-11-23 15:00:07,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:00:07,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:00:07,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:00:07,637 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:00:11,484 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3412#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= (+ |ULTIMATE.start_cstrlcpy_~d~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrlcpy_~d~0#1.base|)) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (= (mod |ULTIMATE.start_cstrlcpy_~n~0#1| 18446744073709551616) 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (= |ULTIMATE.start_cstrlcpy_~s~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_cstrlcpy_~d~0#1.base|) |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) 0) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrlcpy_~d~0#1.base|) 1) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (= (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-23 15:00:11,485 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:00:11,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:00:11,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2022-11-23 15:00:11,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34363051] [2022-11-23 15:00:11,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:00:11,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-23 15:00:11,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:00:11,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-23 15:00:11,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1724, Unknown=4, NotChecked=0, Total=1892 [2022-11-23 15:00:11,487 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 31 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:00:14,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:00:14,278 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2022-11-23 15:00:14,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-23 15:00:14,278 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 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 21 [2022-11-23 15:00:14,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:00:14,279 INFO L225 Difference]: With dead ends: 67 [2022-11-23 15:00:14,279 INFO L226 Difference]: Without dead ends: 67 [2022-11-23 15:00:14,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=346, Invalid=3072, Unknown=4, NotChecked=0, Total=3422 [2022-11-23 15:00:14,281 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 214 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:00:14,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 222 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 15:00:14,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-23 15:00:14,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 58. [2022-11-23 15:00:14,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 57 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:00:14,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2022-11-23 15:00:14,283 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 21 [2022-11-23 15:00:14,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:00:14,284 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2022-11-23 15:00:14,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:00:14,284 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2022-11-23 15:00:14,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-23 15:00:14,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:00:14,285 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:00:14,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 15:00:14,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-23 15:00:14,495 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-23 15:00:14,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:00:14,495 INFO L85 PathProgramCache]: Analyzing trace with hash -529317857, now seen corresponding path program 2 times [2022-11-23 15:00:14,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:00:14,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461671867] [2022-11-23 15:00:14,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:00:14,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:00:14,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:00:16,030 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:00:16,031 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:00:16,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461671867] [2022-11-23 15:00:16,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461671867] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:00:16,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108198281] [2022-11-23 15:00:16,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:00:16,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:00:16,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:00:16,035 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:00:16,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 15:00:16,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 15:00:16,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:00:16,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-23 15:00:16,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:00:16,195 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 [2022-11-23 15:00:16,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2022-11-23 15:00:16,269 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 18 treesize of output 14 [2022-11-23 15:00:16,653 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 28 treesize of output 28 [2022-11-23 15:00:17,159 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 29 treesize of output 29 [2022-11-23 15:00:17,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:00:17,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:00:17,525 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:00:17,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 25 [2022-11-23 15:00:17,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:00:17,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:00:19,217 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:00:19,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 95 treesize of output 83 [2022-11-23 15:00:19,224 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 98 treesize of output 92 [2022-11-23 15:00:19,257 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:00:19,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 121 treesize of output 139 [2022-11-23 15:00:19,268 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 85 treesize of output 81 [2022-11-23 15:00:19,276 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 81 treesize of output 77 [2022-11-23 15:00:19,620 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:00:19,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108198281] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:00:19,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1780094606] [2022-11-23 15:00:19,621 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-23 15:00:19,622 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:00:19,622 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:00:19,622 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:00:19,623 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:00:19,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:00:19,653 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 [2022-11-23 15:00:19,674 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 [2022-11-23 15:00:19,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:00:19,714 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 [2022-11-23 15:00:19,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:00:19,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:00:19,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:00:19,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:00:19,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:00:19,883 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-23 15:00:19,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 44 [2022-11-23 15:00:20,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:00:20,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:00:20,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:00:20,336 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:00:24,961 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3747#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= (+ |ULTIMATE.start_cstrlcpy_~d~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrlcpy_~d~0#1.base|)) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (= (mod |ULTIMATE.start_cstrlcpy_~n~0#1| 18446744073709551616) 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (= |ULTIMATE.start_cstrlcpy_~s~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_cstrlcpy_~d~0#1.base|) |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) 0) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrlcpy_~d~0#1.base|) 1) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (= (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-23 15:00:24,961 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:00:24,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:00:24,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 39 [2022-11-23 15:00:24,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766786338] [2022-11-23 15:00:24,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:00:24,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-23 15:00:24,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:00:24,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-23 15:00:24,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=2671, Unknown=10, NotChecked=0, Total=2970 [2022-11-23 15:00:24,964 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand has 41 states, 40 states have (on average 1.65) internal successors, (66), 40 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:01:13,556 WARN L233 SmtUtils]: Spent 47.29s on a formula simplification. DAG size of input: 165 DAG size of output: 72 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:01:42,715 WARN L233 SmtUtils]: Spent 20.97s on a formula simplification. DAG size of input: 162 DAG size of output: 97 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:01:47,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:02:05,408 WARN L233 SmtUtils]: Spent 16.46s on a formula simplification. DAG size of input: 123 DAG size of output: 42 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:02:12,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:03:07,343 WARN L233 SmtUtils]: Spent 27.61s on a formula simplification. DAG size of input: 174 DAG size of output: 89 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:03:07,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:03:07,526 INFO L93 Difference]: Finished difference Result 85 states and 91 transitions. [2022-11-23 15:03:07,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-23 15:03:07,527 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.65) internal successors, (66), 40 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-23 15:03:07,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:03:07,527 INFO L225 Difference]: With dead ends: 85 [2022-11-23 15:03:07,527 INFO L226 Difference]: Without dead ends: 44 [2022-11-23 15:03:07,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2549 ImplicationChecksByTransitivity, 162.9s TimeCoverageRelationStatistics Valid=1327, Invalid=7888, Unknown=97, NotChecked=0, Total=9312 [2022-11-23 15:03:07,529 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 299 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 108 mSolverCounterUnsat, 73 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 73 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:03:07,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 128 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 553 Invalid, 73 Unknown, 0 Unchecked, 7.0s Time] [2022-11-23 15:03:07,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-23 15:03:07,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-11-23 15:03:07,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 42 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:03:07,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2022-11-23 15:03:07,533 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 22 [2022-11-23 15:03:07,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:03:07,533 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2022-11-23 15:03:07,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.65) internal successors, (66), 40 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:03:07,534 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2022-11-23 15:03:07,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-23 15:03:07,534 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:03:07,535 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2022-11-23 15:03:07,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 15:03:07,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-23 15:03:07,739 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-23 15:03:07,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:03:07,739 INFO L85 PathProgramCache]: Analyzing trace with hash -2113270104, now seen corresponding path program 3 times [2022-11-23 15:03:07,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:03:07,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071810985] [2022-11-23 15:03:07,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:03:07,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:03:07,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:03:08,819 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:03:08,820 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:03:08,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071810985] [2022-11-23 15:03:08,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071810985] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:03:08,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783055293] [2022-11-23 15:03:08,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 15:03:08,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:03:08,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:03:08,821 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:03:08,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 15:03:08,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 15:03:08,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:03:08,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-23 15:03:08,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:03:08,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-23 15:03:08,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-23 15:03:09,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:03:09,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-23 15:03:09,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2022-11-23 15:03:10,030 INFO L321 Elim1Store]: treesize reduction 8, result has 84.9 percent of original size [2022-11-23 15:03:10,031 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 35 treesize of output 59 [2022-11-23 15:03:10,383 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:03:10,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:03:18,359 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:03:18,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 46 [2022-11-23 15:03:18,394 INFO L321 Elim1Store]: treesize reduction 17, result has 54.1 percent of original size [2022-11-23 15:03:18,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 31 [2022-11-23 15:03:18,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:03:18,440 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:03:18,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 94 [2022-11-23 15:03:18,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:03:18,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-23 15:03:19,038 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:03:19,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783055293] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:03:19,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [671246586] [2022-11-23 15:03:19,040 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 15:03:19,040 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:03:19,040 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:03:19,040 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:03:19,041 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:03:19,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:03:19,064 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 [2022-11-23 15:03:19,096 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 [2022-11-23 15:03:19,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:03:19,137 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 [2022-11-23 15:03:19,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:03:19,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:03:19,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:03:19,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:03:19,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:03:19,264 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-23 15:03:19,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 44 [2022-11-23 15:03:19,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:03:19,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:03:19,668 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:03:22,447 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4141#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (= (+ |ULTIMATE.start_cstrlcpy_#t~post4#1.offset| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| (+ |ULTIMATE.start_cstrlcpy_#t~post3#1.offset| 1)) (= |ULTIMATE.start_cstrlcpy_~s~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post4#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post4#1.offset|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post4#1.base|) (= |ULTIMATE.start_cstrlcpy_~d~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-23 15:03:22,447 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:03:22,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:03:22,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 40 [2022-11-23 15:03:22,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827210934] [2022-11-23 15:03:22,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:03:22,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-23 15:03:22,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:03:22,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-23 15:03:22,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=2345, Unknown=17, NotChecked=0, Total=2550 [2022-11-23 15:03:22,450 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 42 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 41 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:03:30,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:03:30,767 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2022-11-23 15:03:30,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-23 15:03:30,767 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 41 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-23 15:03:30,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:03:30,768 INFO L225 Difference]: With dead ends: 56 [2022-11-23 15:03:30,768 INFO L226 Difference]: Without dead ends: 56 [2022-11-23 15:03:30,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=475, Invalid=4193, Unknown=24, NotChecked=0, Total=4692 [2022-11-23 15:03:30,770 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 262 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 52 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:03:30,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 222 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 580 Invalid, 11 Unknown, 0 Unchecked, 1.3s Time] [2022-11-23 15:03:30,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-23 15:03:30,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2022-11-23 15:03:30,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 46 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:03:30,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2022-11-23 15:03:30,773 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 22 [2022-11-23 15:03:30,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:03:30,773 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2022-11-23 15:03:30,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 41 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:03:30,774 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2022-11-23 15:03:30,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-23 15:03:30,774 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:03:30,774 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:03:30,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 15:03:30,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:03:30,980 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-23 15:03:30,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:03:30,981 INFO L85 PathProgramCache]: Analyzing trace with hash 959683711, now seen corresponding path program 3 times [2022-11-23 15:03:30,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:03:30,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161373415] [2022-11-23 15:03:30,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:03:30,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:03:31,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:03:31,807 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:03:31,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:03:31,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161373415] [2022-11-23 15:03:31,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161373415] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:03:31,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793061270] [2022-11-23 15:03:31,807 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 15:03:31,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:03:31,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:03:31,811 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:03:31,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 15:03:31,948 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 15:03:31,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:03:31,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-23 15:03:31,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:03:31,975 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 15:03:31,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-23 15:03:31,984 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 [2022-11-23 15:03:32,031 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 [2022-11-23 15:03:32,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 26 [2022-11-23 15:03:32,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2022-11-23 15:03:32,991 INFO L321 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-11-23 15:03:32,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 31 [2022-11-23 15:03:33,224 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:03:33,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:03:34,459 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:03:34,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 48 [2022-11-23 15:03:34,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 57 [2022-11-23 15:03:34,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 46 [2022-11-23 15:03:34,518 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 7 treesize of output 3 [2022-11-23 15:03:34,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-23 15:03:34,648 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:03:34,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793061270] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:03:34,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [58602270] [2022-11-23 15:03:34,650 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 15:03:34,650 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:03:34,651 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:03:34,651 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:03:34,651 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:03:34,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:03:34,671 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 [2022-11-23 15:03:34,697 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 [2022-11-23 15:03:34,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:03:34,731 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 [2022-11-23 15:03:34,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:03:34,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:03:34,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:03:34,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:03:34,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:03:34,849 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-23 15:03:34,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 44 [2022-11-23 15:03:35,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:03:35,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:03:35,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:03:35,315 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:03:39,873 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4482#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= (+ |ULTIMATE.start_cstrlcpy_~d~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrlcpy_~d~0#1.base|)) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (= (mod |ULTIMATE.start_cstrlcpy_~n~0#1| 18446744073709551616) 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (= |ULTIMATE.start_cstrlcpy_~s~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_cstrlcpy_~d~0#1.base|) |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) 0) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrlcpy_~d~0#1.base|) 1) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (= (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-23 15:03:39,874 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:03:39,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:03:39,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 40 [2022-11-23 15:03:39,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774902111] [2022-11-23 15:03:39,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:03:39,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-23 15:03:39,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:03:39,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-23 15:03:39,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=2742, Unknown=8, NotChecked=0, Total=2970 [2022-11-23 15:03:39,876 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 42 states, 41 states have (on average 1.9024390243902438) internal successors, (78), 41 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:03:47,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:03:47,311 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2022-11-23 15:03:47,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-23 15:03:47,312 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.9024390243902438) internal successors, (78), 41 states have internal predecessors, (78), 0 states have call successors, (0), 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 26 [2022-11-23 15:03:47,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:03:47,312 INFO L225 Difference]: With dead ends: 57 [2022-11-23 15:03:47,313 INFO L226 Difference]: Without dead ends: 57 [2022-11-23 15:03:47,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1193 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=442, Invalid=4660, Unknown=10, NotChecked=0, Total=5112 [2022-11-23 15:03:47,315 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 238 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 53 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:03:47,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 212 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 506 Invalid, 8 Unknown, 0 Unchecked, 1.5s Time] [2022-11-23 15:03:47,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-23 15:03:47,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2022-11-23 15:03:47,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 51 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) [2022-11-23 15:03:47,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2022-11-23 15:03:47,319 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 26 [2022-11-23 15:03:47,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:03:47,319 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2022-11-23 15:03:47,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 1.9024390243902438) internal successors, (78), 41 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:03:47,320 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2022-11-23 15:03:47,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-23 15:03:47,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:03:47,320 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1] [2022-11-23 15:03:47,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 15:03:47,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:03:47,527 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-23 15:03:47,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:03:47,528 INFO L85 PathProgramCache]: Analyzing trace with hash 2083872407, now seen corresponding path program 3 times [2022-11-23 15:03:47,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:03:47,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543496691] [2022-11-23 15:03:47,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:03:47,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:03:47,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:03:48,958 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 11 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:03:48,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:03:48,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543496691] [2022-11-23 15:03:48,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543496691] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:03:48,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794494243] [2022-11-23 15:03:48,959 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 15:03:48,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:03:48,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:03:48,960 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:03:48,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 15:03:49,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 15:03:49,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:03:49,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-23 15:03:49,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:03:49,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:03:49,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2022-11-23 15:03:49,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-23 15:03:50,544 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:03:50,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:03:52,207 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:03:52,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794494243] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:03:52,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1199877613] [2022-11-23 15:03:52,208 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 15:03:52,209 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:03:52,209 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:03:52,209 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:03:52,209 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:03:52,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:03:52,251 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 [2022-11-23 15:03:52,284 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 [2022-11-23 15:03:52,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:03:52,323 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 [2022-11-23 15:03:52,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:03:52,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:03:52,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:03:52,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:03:52,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:03:52,450 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-23 15:03:52,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 44 [2022-11-23 15:03:52,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:03:52,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:03:52,834 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:03:56,188 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4844#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post3#1.offset| 1)) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post4#1.base|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-23 15:03:56,188 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:03:56,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:03:56,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 40 [2022-11-23 15:03:56,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362953627] [2022-11-23 15:03:56,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:03:56,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-23 15:03:56,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:03:56,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-23 15:03:56,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=2344, Unknown=0, NotChecked=0, Total=2550 [2022-11-23 15:03:56,191 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 42 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:04,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:04:04,841 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2022-11-23 15:04:04,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-23 15:04:04,841 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-23 15:04:04,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:04:04,842 INFO L225 Difference]: With dead ends: 88 [2022-11-23 15:04:04,842 INFO L226 Difference]: Without dead ends: 88 [2022-11-23 15:04:04,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=745, Invalid=5897, Unknown=0, NotChecked=0, Total=6642 [2022-11-23 15:04:04,844 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 393 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:04:04,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 232 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-23 15:04:04,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-23 15:04:04,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 47. [2022-11-23 15:04:04,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 46 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:04,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2022-11-23 15:04:04,848 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 28 [2022-11-23 15:04:04,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:04:04,848 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2022-11-23 15:04:04,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:04,849 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2022-11-23 15:04:04,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-23 15:04:04,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:04:04,849 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:04:04,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-23 15:04:05,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-23 15:04:05,063 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-23 15:04:05,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:04:05,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1659839438, now seen corresponding path program 3 times [2022-11-23 15:04:05,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:04:05,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090504316] [2022-11-23 15:04:05,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:04:05,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:04:05,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:04:08,906 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:04:08,906 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:04:08,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090504316] [2022-11-23 15:04:08,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090504316] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:04:08,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943233608] [2022-11-23 15:04:08,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 15:04:08,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:04:08,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:04:08,908 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:04:08,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 15:04:09,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 15:04:09,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:04:09,039 WARN L261 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 126 conjunts are in the unsatisfiable core [2022-11-23 15:04:09,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:04:09,063 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 15:04:09,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-23 15:04:09,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-23 15:04:09,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:04:09,490 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 25 [2022-11-23 15:04:09,980 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 33 treesize of output 31 [2022-11-23 15:04:10,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2022-11-23 15:04:10,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:10,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:10,972 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-23 15:04:10,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 55 [2022-11-23 15:04:11,338 INFO L321 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2022-11-23 15:04:11,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 48 treesize of output 42 [2022-11-23 15:04:11,628 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:04:11,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:04:14,746 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:04:14,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-11-23 15:04:16,562 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:04:16,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 60 [2022-11-23 15:04:16,573 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 88 treesize of output 80 [2022-11-23 15:04:16,583 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:04:16,586 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 20 treesize of output 20 [2022-11-23 15:04:16,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 63 [2022-11-23 15:04:16,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-23 15:04:16,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-23 15:04:16,906 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:04:16,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943233608] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:04:16,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1346210446] [2022-11-23 15:04:16,908 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-23 15:04:16,908 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:04:16,908 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:04:16,908 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:04:16,908 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:04:16,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:16,940 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 [2022-11-23 15:04:16,962 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 [2022-11-23 15:04:16,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:16,998 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 [2022-11-23 15:04:17,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:17,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:04:17,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:17,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:04:17,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:17,102 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-23 15:04:17,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 44 [2022-11-23 15:04:17,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:04:17,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:04:17,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:04:17,552 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:04:23,921 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5280#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= (+ |ULTIMATE.start_cstrlcpy_~d~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrlcpy_~d~0#1.base|)) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (= (mod |ULTIMATE.start_cstrlcpy_~n~0#1| 18446744073709551616) 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (= |ULTIMATE.start_cstrlcpy_~s~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_cstrlcpy_~d~0#1.base|) |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) 0) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrlcpy_~d~0#1.base|) 1) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (= (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-23 15:04:23,922 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:04:23,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:04:23,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 60 [2022-11-23 15:04:23,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972150584] [2022-11-23 15:04:23,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:04:23,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-23 15:04:23,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:04:23,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-23 15:04:23,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=5311, Unknown=36, NotChecked=0, Total=5700 [2022-11-23 15:04:23,925 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 62 states, 61 states have (on average 1.4262295081967213) internal successors, (87), 61 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:38,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:04:43,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:04:50,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:04:51,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:04:51,351 INFO L93 Difference]: Finished difference Result 78 states and 81 transitions. [2022-11-23 15:04:51,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-23 15:04:51,356 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.4262295081967213) internal successors, (87), 61 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-23 15:04:51,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:04:51,356 INFO L225 Difference]: With dead ends: 78 [2022-11-23 15:04:51,356 INFO L226 Difference]: Without dead ends: 62 [2022-11-23 15:04:51,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2753 ImplicationChecksByTransitivity, 35.1s TimeCoverageRelationStatistics Valid=1105, Invalid=11956, Unknown=49, NotChecked=0, Total=13110 [2022-11-23 15:04:51,359 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 360 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 100 mSolverCounterUnsat, 19 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 19 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-11-23 15:04:51,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 95 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 953 Invalid, 19 Unknown, 0 Unchecked, 6.8s Time] [2022-11-23 15:04:51,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-23 15:04:51,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2022-11-23 15:04:51,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 53 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:51,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2022-11-23 15:04:51,361 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 29 [2022-11-23 15:04:51,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:04:51,362 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2022-11-23 15:04:51,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.4262295081967213) internal successors, (87), 61 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:51,362 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2022-11-23 15:04:51,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-23 15:04:51,363 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:04:51,363 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1] [2022-11-23 15:04:51,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-23 15:04:51,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:04:51,569 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-23 15:04:51,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:04:51,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1902155224, now seen corresponding path program 4 times [2022-11-23 15:04:51,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:04:51,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089362813] [2022-11-23 15:04:51,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:04:51,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:04:51,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:04:53,208 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:04:53,208 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:04:53,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089362813] [2022-11-23 15:04:53,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089362813] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:04:53,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689905342] [2022-11-23 15:04:53,208 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 15:04:53,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:04:53,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:04:53,210 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:04:53,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fc37a8-c0e2-4224-a05c-319653d31381/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-23 15:04:53,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:04:53,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 109 conjunts are in the unsatisfiable core [2022-11-23 15:04:53,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:04:53,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-23 15:04:53,433 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 [2022-11-23 15:04:53,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 26 [2022-11-23 15:04:59,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2022-11-23 15:05:14,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2022-11-23 15:05:24,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 50 [2022-11-23 15:05:24,674 INFO L321 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2022-11-23 15:05:24,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 47 [2022-11-23 15:05:24,823 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 44 refuted. 21 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:05:24,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:05:28,690 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:05:28,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 72 [2022-11-23 15:05:28,726 INFO L321 Elim1Store]: treesize reduction 17, result has 54.1 percent of original size [2022-11-23 15:05:28,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 31 [2022-11-23 15:05:28,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:05:28,774 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:05:28,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 119 treesize of output 116 [2022-11-23 15:05:28,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:05:28,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:05:28,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:05:28,844 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 [2022-11-23 15:05:28,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:05:29,053 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:05:29,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689905342] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:05:29,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1246307399] [2022-11-23 15:05:29,054 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 15:05:29,055 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:05:29,055 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:05:29,055 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:05:29,056 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:05:29,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:05:29,084 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 [2022-11-23 15:05:29,109 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 [2022-11-23 15:05:29,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:05:29,144 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 [2022-11-23 15:05:29,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:05:29,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:05:29,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:05:29,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:05:29,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:05:29,271 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-23 15:05:29,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 44 [2022-11-23 15:05:29,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:05:29,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:05:29,652 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:05:33,351 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5752#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (= (+ |ULTIMATE.start_cstrlcpy_#t~post4#1.offset| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| (+ |ULTIMATE.start_cstrlcpy_#t~post3#1.offset| 1)) (= |ULTIMATE.start_cstrlcpy_~s~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post4#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post4#1.offset|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post4#1.base|) (= |ULTIMATE.start_cstrlcpy_~d~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-23 15:05:33,351 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:05:33,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:05:33,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 22] total 60 [2022-11-23 15:05:33,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130109623] [2022-11-23 15:05:33,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:05:33,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-23 15:05:33,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:05:33,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-23 15:05:33,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=4604, Unknown=52, NotChecked=0, Total=4970 [2022-11-23 15:05:33,353 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 62 states, 61 states have (on average 1.5245901639344261) internal successors, (93), 61 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) [2022-11-23 15:05:38,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:05:43,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:05:45,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:05:49,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:05:51,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:05:53,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:05:59,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:06:02,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:06:04,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:06:05,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:06:15,667 WARN L233 SmtUtils]: Spent 7.62s on a formula simplification. DAG size of input: 73 DAG size of output: 63 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:06:17,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:06:30,725 WARN L233 SmtUtils]: Spent 13.26s on a formula simplification. DAG size of input: 91 DAG size of output: 72 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:06:32,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:06:33,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:06:35,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:06:51,166 WARN L233 SmtUtils]: Spent 15.92s on a formula simplification. DAG size of input: 131 DAG size of output: 85 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:06:53,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:07:06,299 WARN L233 SmtUtils]: Spent 11.20s on a formula simplification. DAG size of input: 87 DAG size of output: 76 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:07:08,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:07:25,724 WARN L233 SmtUtils]: Spent 17.34s on a formula simplification. DAG size of input: 103 DAG size of output: 85 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:07:27,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:07:29,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:08:01,930 WARN L233 SmtUtils]: Spent 31.97s on a formula simplification. DAG size of input: 155 DAG size of output: 97 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:08:04,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:08:19,293 WARN L233 SmtUtils]: Spent 13.16s on a formula simplification. DAG size of input: 100 DAG size of output: 89 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:08:21,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:08:23,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:08:37,577 WARN L233 SmtUtils]: Spent 10.16s on a formula simplification. DAG size of input: 100 DAG size of output: 81 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:08:39,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:08:41,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:08:43,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:08:45,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:08:47,008 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:09:08,059 WARN L233 SmtUtils]: Spent 14.81s on a formula simplification. DAG size of input: 153 DAG size of output: 72 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:09:10,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:09:12,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:09:14,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:09:16,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:09:18,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:09:20,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:09:22,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:09:24,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:09:52,467 WARN L233 SmtUtils]: Spent 22.03s on a formula simplification. DAG size of input: 200 DAG size of output: 163 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:09:54,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-23 15:09:56,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-23 15:10:11,362 WARN L233 SmtUtils]: Spent 11.14s on a formula simplification. DAG size of input: 89 DAG size of output: 76 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:10:13,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:10:15,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:10:16,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:10:18,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:10:19,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:10:37,838 WARN L233 SmtUtils]: Spent 13.58s on a formula simplification. DAG size of input: 101 DAG size of output: 89 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:10:57,117 WARN L233 SmtUtils]: Spent 16.80s on a formula simplification. DAG size of input: 103 DAG size of output: 89 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:10:58,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:11:00,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:11:01,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:11:03,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:11:05,166 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:11:34,975 WARN L233 SmtUtils]: Spent 17.64s on a formula simplification. DAG size of input: 153 DAG size of output: 104 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:11:37,008 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:11:39,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:12:11,902 WARN L233 SmtUtils]: Spent 28.48s on a formula simplification. DAG size of input: 163 DAG size of output: 104 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:12:14,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:12:32,573 WARN L233 SmtUtils]: Spent 12.62s on a formula simplification. DAG size of input: 97 DAG size of output: 83 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:12:34,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:12:36,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:13:01,193 WARN L233 SmtUtils]: Spent 18.37s on a formula simplification. DAG size of input: 109 DAG size of output: 96 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)