./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/simple-ext_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4045c7c-46e9-4061-ad1c-f3d5dda33723/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4045c7c-46e9-4061-ad1c-f3d5dda33723/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4045c7c-46e9-4061-ad1c-f3d5dda33723/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4045c7c-46e9-4061-ad1c-f3d5dda33723/bin/utaipan-verify-DbMuA5NWw2/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/simple-ext_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4045c7c-46e9-4061-ad1c-f3d5dda33723/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4045c7c-46e9-4061-ad1c-f3d5dda33723/bin/utaipan-verify-DbMuA5NWw2 --witnessprinter.witness.filename witness --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 32bit --witnessprinter.graph.data.programhash cf7f5d5a0c627430d9132d0f1be3b1c0ad58f22e7924c03137596c145de85b8c --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:24:18,228 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:24:18,328 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4045c7c-46e9-4061-ad1c-f3d5dda33723/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-02 12:24:18,333 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:24:18,334 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:24:18,368 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:24:18,369 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:24:18,369 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:24:18,370 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:24:18,371 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:24:18,372 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:24:18,372 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:24:18,373 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:24:18,373 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:24:18,373 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:24:18,374 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:24:18,374 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:24:18,377 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:24:18,377 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:24:18,378 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:24:18,381 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:24:18,381 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:24:18,382 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-02 12:24:18,382 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-02 12:24:18,383 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:24:18,383 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:24:18,395 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:24:18,396 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:24:18,396 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:24:18,397 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-02 12:24:18,397 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-02 12:24:18,397 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-02 12:24:18,398 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:24:18,398 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-02 12:24:18,398 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:24:18,398 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-02 12:24:18,399 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:24:18,399 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:24:18,399 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:24:18,400 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:24:18,400 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:24:18,400 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:24:18,401 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:24:18,401 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:24:18,401 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:24:18,402 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:24:18,402 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:24:18,402 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:24:18,402 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:24:18,403 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_a4045c7c-46e9-4061-ad1c-f3d5dda33723/bin/utaipan-verify-DbMuA5NWw2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4045c7c-46e9-4061-ad1c-f3d5dda33723/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cf7f5d5a0c627430d9132d0f1be3b1c0ad58f22e7924c03137596c145de85b8c [2024-11-02 12:24:18,697 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:24:18,734 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:24:18,740 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:24:18,742 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:24:18,742 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:24:18,744 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4045c7c-46e9-4061-ad1c-f3d5dda33723/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/list-ext-properties/simple-ext_1.i Unable to find full path for "g++" [2024-11-02 12:24:20,887 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:24:21,133 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:24:21,134 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4045c7c-46e9-4061-ad1c-f3d5dda33723/sv-benchmarks/c/list-ext-properties/simple-ext_1.i [2024-11-02 12:24:21,152 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4045c7c-46e9-4061-ad1c-f3d5dda33723/bin/utaipan-verify-DbMuA5NWw2/data/f73ecb233/b09c2bc9650146758def2abce9f22fc6/FLAGf25861d4b [2024-11-02 12:24:21,458 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4045c7c-46e9-4061-ad1c-f3d5dda33723/bin/utaipan-verify-DbMuA5NWw2/data/f73ecb233/b09c2bc9650146758def2abce9f22fc6 [2024-11-02 12:24:21,461 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:24:21,463 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:24:21,464 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:24:21,464 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:24:21,469 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:24:21,470 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:24:21" (1/1) ... [2024-11-02 12:24:21,471 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48d24e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:24:21, skipping insertion in model container [2024-11-02 12:24:21,471 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:24:21" (1/1) ... [2024-11-02 12:24:21,514 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:24:21,919 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:24:21,929 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:24:21,991 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:24:22,020 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:24:22,021 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:24:22 WrapperNode [2024-11-02 12:24:22,021 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:24:22,022 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:24:22,022 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:24:22,023 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:24:22,031 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:24:22" (1/1) ... [2024-11-02 12:24:22,050 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:24:22" (1/1) ... [2024-11-02 12:24:22,072 INFO L138 Inliner]: procedures = 124, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 80 [2024-11-02 12:24:22,073 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:24:22,074 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:24:22,074 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:24:22,074 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:24:22,081 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:24:22" (1/1) ... [2024-11-02 12:24:22,081 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:24:22" (1/1) ... [2024-11-02 12:24:22,085 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:24:22" (1/1) ... [2024-11-02 12:24:22,085 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:24:22" (1/1) ... [2024-11-02 12:24:22,093 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:24:22" (1/1) ... [2024-11-02 12:24:22,097 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:24:22" (1/1) ... [2024-11-02 12:24:22,098 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:24:22" (1/1) ... [2024-11-02 12:24:22,101 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:24:22" (1/1) ... [2024-11-02 12:24:22,104 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:24:22,105 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:24:22,106 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:24:22,106 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:24:22,107 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:24:22" (1/1) ... [2024-11-02 12:24:22,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:24:22,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4045c7c-46e9-4061-ad1c-f3d5dda33723/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:24:22,145 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4045c7c-46e9-4061-ad1c-f3d5dda33723/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:24:22,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4045c7c-46e9-4061-ad1c-f3d5dda33723/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:24:22,181 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2024-11-02 12:24:22,181 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2024-11-02 12:24:22,182 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-02 12:24:22,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-02 12:24:22,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-02 12:24:22,184 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:24:22,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-02 12:24:22,185 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-02 12:24:22,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-02 12:24:22,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:24:22,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:24:22,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:24:22,300 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:24:22,303 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:24:22,333 INFO L735 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2024-11-02 12:24:22,570 INFO L? ?]: Removed 51 outVars from TransFormulas that were not future-live. [2024-11-02 12:24:22,570 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:24:22,666 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:24:22,667 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-02 12:24:22,668 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:24:22 BoogieIcfgContainer [2024-11-02 12:24:22,668 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:24:22,672 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:24:22,672 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:24:22,675 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:24:22,676 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:24:21" (1/3) ... [2024-11-02 12:24:22,677 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b3954ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:24:22, skipping insertion in model container [2024-11-02 12:24:22,677 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:24:22" (2/3) ... [2024-11-02 12:24:22,677 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b3954ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:24:22, skipping insertion in model container [2024-11-02 12:24:22,678 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:24:22" (3/3) ... [2024-11-02 12:24:22,679 INFO L112 eAbstractionObserver]: Analyzing ICFG simple-ext_1.i [2024-11-02 12:24:22,699 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:24:22,700 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2024-11-02 12:24:22,748 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:24:22,756 INFO L333 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, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@4e56f686, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:24:22,758 INFO L334 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2024-11-02 12:24:22,762 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 48 states have internal predecessors, (55), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:24:22,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-02 12:24:22,774 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:24:22,775 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-02 12:24:22,776 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-02 12:24:22,783 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:24:22,784 INFO L85 PathProgramCache]: Analyzing trace with hash 150937256, now seen corresponding path program 1 times [2024-11-02 12:24:22,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:24:22,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904145697] [2024-11-02 12:24:22,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:24:22,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:24:22,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:24:23,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:24:23,005 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:24:23,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904145697] [2024-11-02 12:24:23,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904145697] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:24:23,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:24:23,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 12:24:23,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427219353] [2024-11-02 12:24:23,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:24:23,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-02 12:24:23,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:24:23,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-02 12:24:23,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-02 12:24:23,062 INFO L87 Difference]: Start difference. First operand has 50 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 48 states have internal predecessors, (55), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:24:23,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:24:23,119 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2024-11-02 12:24:23,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-02 12:24:23,123 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-02 12:24:23,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:24:23,130 INFO L225 Difference]: With dead ends: 49 [2024-11-02 12:24:23,130 INFO L226 Difference]: Without dead ends: 44 [2024-11-02 12:24:23,133 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-02 12:24:23,137 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:24:23,140 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:24:23,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-02 12:24:23,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-11-02 12:24:23,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 23 states have (on average 2.0) internal successors, (46), 43 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) [2024-11-02 12:24:23,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2024-11-02 12:24:23,176 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 5 [2024-11-02 12:24:23,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:24:23,177 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2024-11-02 12:24:23,177 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:24:23,178 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2024-11-02 12:24:23,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-02 12:24:23,178 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:24:23,179 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-02 12:24:23,179 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:24:23,179 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-02 12:24:23,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:24:23,180 INFO L85 PathProgramCache]: Analyzing trace with hash 384171487, now seen corresponding path program 1 times [2024-11-02 12:24:23,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:24:23,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730567441] [2024-11-02 12:24:23,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:24:23,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:24:23,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:24:23,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:24:23,327 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:24:23,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730567441] [2024-11-02 12:24:23,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730567441] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:24:23,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:24:23,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 12:24:23,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432278283] [2024-11-02 12:24:23,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:24:23,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:24:23,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:24:23,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:24:23,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:24:23,333 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:24:23,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:24:23,521 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2024-11-02 12:24:23,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 12:24:23,521 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-02 12:24:23,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:24:23,524 INFO L225 Difference]: With dead ends: 47 [2024-11-02 12:24:23,524 INFO L226 Difference]: Without dead ends: 47 [2024-11-02 12:24:23,525 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:24:23,526 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 50 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:24:23,528 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 14 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:24:23,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-02 12:24:23,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-11-02 12:24:23,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 46 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:24:23,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2024-11-02 12:24:23,535 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 6 [2024-11-02 12:24:23,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:24:23,536 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2024-11-02 12:24:23,536 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:24:23,536 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2024-11-02 12:24:23,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-02 12:24:23,538 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:24:23,538 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-02 12:24:23,538 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 12:24:23,538 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-02 12:24:23,539 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:24:23,539 INFO L85 PathProgramCache]: Analyzing trace with hash 384171488, now seen corresponding path program 1 times [2024-11-02 12:24:23,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:24:23,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721147189] [2024-11-02 12:24:23,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:24:23,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:24:23,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:24:23,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:24:23,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:24:23,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721147189] [2024-11-02 12:24:23,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721147189] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:24:23,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:24:23,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 12:24:23,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357741819] [2024-11-02 12:24:23,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:24:23,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:24:23,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:24:23,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:24:23,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:24:23,743 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:24:23,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:24:23,879 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2024-11-02 12:24:23,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 12:24:23,880 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-02 12:24:23,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:24:23,881 INFO L225 Difference]: With dead ends: 57 [2024-11-02 12:24:23,881 INFO L226 Difference]: Without dead ends: 57 [2024-11-02 12:24:23,882 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:24:23,883 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 53 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:24:23,883 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 29 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:24:23,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-02 12:24:23,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2024-11-02 12:24:23,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 38 states have (on average 1.5789473684210527) internal successors, (60), 53 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:24:23,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2024-11-02 12:24:23,890 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 6 [2024-11-02 12:24:23,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:24:23,890 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2024-11-02 12:24:23,890 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:24:23,891 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2024-11-02 12:24:23,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-02 12:24:23,891 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:24:23,891 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:24:23,892 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 12:24:23,892 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-02 12:24:23,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:24:23,893 INFO L85 PathProgramCache]: Analyzing trace with hash 370600693, now seen corresponding path program 1 times [2024-11-02 12:24:23,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:24:23,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194935945] [2024-11-02 12:24:23,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:24:23,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:24:23,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:24:24,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:24:24,059 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:24:24,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194935945] [2024-11-02 12:24:24,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194935945] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:24:24,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:24:24,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:24:24,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064521398] [2024-11-02 12:24:24,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:24:24,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:24:24,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:24:24,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:24:24,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:24:24,064 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:24:24,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:24:24,152 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2024-11-02 12:24:24,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:24:24,153 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-02 12:24:24,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:24:24,154 INFO L225 Difference]: With dead ends: 57 [2024-11-02 12:24:24,154 INFO L226 Difference]: Without dead ends: 57 [2024-11-02 12:24:24,154 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:24:24,155 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 37 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:24:24,159 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 43 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:24:24,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-02 12:24:24,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2024-11-02 12:24:24,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 53 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:24:24,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2024-11-02 12:24:24,167 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 10 [2024-11-02 12:24:24,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:24:24,167 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2024-11-02 12:24:24,167 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:24:24,167 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2024-11-02 12:24:24,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-02 12:24:24,172 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:24:24,172 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:24:24,172 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 12:24:24,172 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-02 12:24:24,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:24:24,173 INFO L85 PathProgramCache]: Analyzing trace with hash -404450213, now seen corresponding path program 1 times [2024-11-02 12:24:24,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:24:24,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146635833] [2024-11-02 12:24:24,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:24:24,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:24:24,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:24:24,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:24:24,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:24:24,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146635833] [2024-11-02 12:24:24,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146635833] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:24:24,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:24:24,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-02 12:24:24,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050937835] [2024-11-02 12:24:24,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:24:24,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-02 12:24:24,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:24:24,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-02 12:24:24,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:24:24,496 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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) [2024-11-02 12:24:24,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:24:24,714 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2024-11-02 12:24:24,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-02 12:24:24,715 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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 [2024-11-02 12:24:24,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:24:24,716 INFO L225 Difference]: With dead ends: 61 [2024-11-02 12:24:24,717 INFO L226 Difference]: Without dead ends: 61 [2024-11-02 12:24:24,718 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-02 12:24:24,719 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 21 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:24:24,720 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 74 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:24:24,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-02 12:24:24,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2024-11-02 12:24:24,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 56 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:24:24,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2024-11-02 12:24:24,732 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 12 [2024-11-02 12:24:24,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:24:24,732 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2024-11-02 12:24:24,732 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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) [2024-11-02 12:24:24,733 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2024-11-02 12:24:24,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-02 12:24:24,734 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:24:24,735 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:24:24,735 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-02 12:24:24,735 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-02 12:24:24,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:24:24,736 INFO L85 PathProgramCache]: Analyzing trace with hash 158252498, now seen corresponding path program 1 times [2024-11-02 12:24:24,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:24:24,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328374305] [2024-11-02 12:24:24,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:24:24,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:24:24,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:24:24,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:24:24,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:24:24,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328374305] [2024-11-02 12:24:24,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328374305] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:24:24,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:24:24,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:24:24,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879960132] [2024-11-02 12:24:24,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:24:24,923 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:24:24,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:24:24,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:24:24,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:24:24,924 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand has 5 states, 4 states have (on average 3.0) 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) [2024-11-02 12:24:25,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:24:25,077 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2024-11-02 12:24:25,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 12:24:25,079 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) 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 12 [2024-11-02 12:24:25,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:24:25,079 INFO L225 Difference]: With dead ends: 55 [2024-11-02 12:24:25,079 INFO L226 Difference]: Without dead ends: 55 [2024-11-02 12:24:25,080 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:24:25,084 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 11 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:24:25,085 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 45 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:24:25,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-02 12:24:25,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-11-02 12:24:25,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 41 states have (on average 1.4634146341463414) internal successors, (60), 54 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:24:25,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2024-11-02 12:24:25,093 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 12 [2024-11-02 12:24:25,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:24:25,094 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2024-11-02 12:24:25,094 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) 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) [2024-11-02 12:24:25,094 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2024-11-02 12:24:25,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-02 12:24:25,094 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:24:25,095 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:24:25,095 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-02 12:24:25,095 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-02 12:24:25,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:24:25,099 INFO L85 PathProgramCache]: Analyzing trace with hash 158252499, now seen corresponding path program 1 times [2024-11-02 12:24:25,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:24:25,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745706059] [2024-11-02 12:24:25,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:24:25,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:24:25,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:24:25,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:24:25,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:24:25,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745706059] [2024-11-02 12:24:25,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745706059] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:24:25,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:24:25,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:24:25,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322989130] [2024-11-02 12:24:25,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:24:25,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:24:25,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:24:25,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:24:25,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:24:25,352 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand has 5 states, 4 states have (on average 3.0) 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) [2024-11-02 12:24:25,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:24:25,533 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2024-11-02 12:24:25,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-02 12:24:25,534 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) 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 12 [2024-11-02 12:24:25,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:24:25,535 INFO L225 Difference]: With dead ends: 50 [2024-11-02 12:24:25,535 INFO L226 Difference]: Without dead ends: 50 [2024-11-02 12:24:25,535 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:24:25,536 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 4 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:24:25,536 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 57 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:24:25,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-02 12:24:25,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2024-11-02 12:24:25,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 45 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) [2024-11-02 12:24:25,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2024-11-02 12:24:25,544 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 12 [2024-11-02 12:24:25,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:24:25,544 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2024-11-02 12:24:25,544 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) 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) [2024-11-02 12:24:25,545 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2024-11-02 12:24:25,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-02 12:24:25,545 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:24:25,545 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:24:25,545 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-02 12:24:25,549 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-02 12:24:25,549 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:24:25,549 INFO L85 PathProgramCache]: Analyzing trace with hash 345684089, now seen corresponding path program 1 times [2024-11-02 12:24:25,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:24:25,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149793202] [2024-11-02 12:24:25,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:24:25,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:24:25,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:24:25,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:24:25,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:24:25,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149793202] [2024-11-02 12:24:25,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149793202] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:24:25,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378043625] [2024-11-02 12:24:25,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:24:25,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:24:25,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4045c7c-46e9-4061-ad1c-f3d5dda33723/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:24:25,841 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4045c7c-46e9-4061-ad1c-f3d5dda33723/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:24:25,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4045c7c-46e9-4061-ad1c-f3d5dda33723/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:24:25,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:24:25,936 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-02 12:24:25,942 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:24:26,053 INFO L378 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 [2024-11-02 12:24:26,063 INFO L378 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 [2024-11-02 12:24:26,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:24:26,142 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:24:26,293 INFO L378 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 47 treesize of output 41 [2024-11-02 12:24:26,301 INFO L378 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 39 treesize of output 33 [2024-11-02 12:24:26,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:24:26,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378043625] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:24:26,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [699647189] [2024-11-02 12:24:26,516 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-02 12:24:26,516 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:24:26,521 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:24:26,527 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:24:26,528 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:24:27,080 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:24:29,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [699647189] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:24:29,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:24:29,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6, 6] total 16 [2024-11-02 12:24:29,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089303317] [2024-11-02 12:24:29,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:24:29,038 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-02 12:24:29,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:24:29,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-02 12:24:29,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2024-11-02 12:24:29,040 INFO L87 Difference]: Start difference. First operand 46 states and 51 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) [2024-11-02 12:24:29,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:24:29,769 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2024-11-02 12:24:29,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-02 12:24:29,770 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 13 [2024-11-02 12:24:29,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:24:29,771 INFO L225 Difference]: With dead ends: 52 [2024-11-02 12:24:29,771 INFO L226 Difference]: Without dead ends: 52 [2024-11-02 12:24:29,771 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2024-11-02 12:24:29,772 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-02 12:24:29,772 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 36 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-02 12:24:29,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-02 12:24:29,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2024-11-02 12:24:29,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 47 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) [2024-11-02 12:24:29,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2024-11-02 12:24:29,777 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 13 [2024-11-02 12:24:29,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:24:29,777 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2024-11-02 12:24:29,777 INFO L472 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) [2024-11-02 12:24:29,778 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2024-11-02 12:24:29,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-02 12:24:29,778 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:24:29,778 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:24:29,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4045c7c-46e9-4061-ad1c-f3d5dda33723/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-02 12:24:29,983 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4045c7c-46e9-4061-ad1c-f3d5dda33723/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:24:29,983 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-02 12:24:29,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:24:29,984 INFO L85 PathProgramCache]: Analyzing trace with hash 2126344518, now seen corresponding path program 1 times [2024-11-02 12:24:29,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:24:29,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006830716] [2024-11-02 12:24:29,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:24:29,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:24:30,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:24:30,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:24:30,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:24:30,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006830716] [2024-11-02 12:24:30,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006830716] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:24:30,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687188255] [2024-11-02 12:24:30,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:24:30,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:24:30,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4045c7c-46e9-4061-ad1c-f3d5dda33723/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:24:30,096 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4045c7c-46e9-4061-ad1c-f3d5dda33723/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:24:30,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4045c7c-46e9-4061-ad1c-f3d5dda33723/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 12:24:30,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:24:30,185 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-02 12:24:30,187 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:24:30,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:24:30,217 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:24:30,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687188255] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:24:30,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:24:30,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2024-11-02 12:24:30,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032143702] [2024-11-02 12:24:30,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:24:30,219 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:24:30,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:24:30,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:24:30,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:24:30,220 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 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) [2024-11-02 12:24:30,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:24:30,315 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2024-11-02 12:24:30,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 12:24:30,316 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 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 [2024-11-02 12:24:30,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:24:30,316 INFO L225 Difference]: With dead ends: 60 [2024-11-02 12:24:30,316 INFO L226 Difference]: Without dead ends: 60 [2024-11-02 12:24:30,317 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:24:30,317 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 36 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:24:30,318 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 28 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:24:30,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-02 12:24:30,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 48. [2024-11-02 12:24:30,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.358974358974359) internal successors, (53), 47 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) [2024-11-02 12:24:30,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2024-11-02 12:24:30,322 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 14 [2024-11-02 12:24:30,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:24:30,322 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2024-11-02 12:24:30,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 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) [2024-11-02 12:24:30,323 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2024-11-02 12:24:30,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-02 12:24:30,323 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:24:30,323 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:24:30,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4045c7c-46e9-4061-ad1c-f3d5dda33723/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-02 12:24:30,524 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4045c7c-46e9-4061-ad1c-f3d5dda33723/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:24:30,524 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-02 12:24:30,525 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:24:30,525 INFO L85 PathProgramCache]: Analyzing trace with hash -988293169, now seen corresponding path program 1 times [2024-11-02 12:24:30,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:24:30,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723717416] [2024-11-02 12:24:30,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:24:30,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:24:30,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:24:30,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:24:30,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:24:30,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723717416] [2024-11-02 12:24:30,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723717416] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:24:30,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:24:30,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 12:24:30,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155309176] [2024-11-02 12:24:30,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:24:30,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:24:30,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:24:30,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:24:30,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:24:30,593 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:24:30,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:24:30,673 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2024-11-02 12:24:30,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 12:24:30,673 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-02 12:24:30,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:24:30,674 INFO L225 Difference]: With dead ends: 59 [2024-11-02 12:24:30,674 INFO L226 Difference]: Without dead ends: 59 [2024-11-02 12:24:30,674 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:24:30,675 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 33 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:24:30,675 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 29 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:24:30,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-02 12:24:30,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2024-11-02 12:24:30,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 40 states have (on average 1.35) internal successors, (54), 48 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) [2024-11-02 12:24:30,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2024-11-02 12:24:30,682 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 16 [2024-11-02 12:24:30,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:24:30,682 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2024-11-02 12:24:30,682 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:24:30,682 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2024-11-02 12:24:30,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-02 12:24:30,686 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:24:30,686 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:24:30,686 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-02 12:24:30,687 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-02 12:24:30,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:24:30,687 INFO L85 PathProgramCache]: Analyzing trace with hash -785624562, now seen corresponding path program 1 times [2024-11-02 12:24:30,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:24:30,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129683481] [2024-11-02 12:24:30,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:24:30,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:24:30,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:24:31,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:24:31,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:24:31,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129683481] [2024-11-02 12:24:31,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129683481] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:24:31,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069616271] [2024-11-02 12:24:31,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:24:31,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:24:31,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4045c7c-46e9-4061-ad1c-f3d5dda33723/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:24:31,053 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4045c7c-46e9-4061-ad1c-f3d5dda33723/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:24:31,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4045c7c-46e9-4061-ad1c-f3d5dda33723/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 12:24:31,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:24:31,150 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-02 12:24:31,153 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:24:31,250 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-02 12:24:31,250 INFO L378 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 11 treesize of output 11 [2024-11-02 12:24:31,262 INFO L378 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 11 treesize of output 7 [2024-11-02 12:24:31,315 INFO L378 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 15 treesize of output 1 [2024-11-02 12:24:31,327 INFO L378 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 11 [2024-11-02 12:24:31,377 INFO L378 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 16 treesize of output 8 [2024-11-02 12:24:31,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-02 12:24:31,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-02 12:24:31,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:24:31,530 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:24:31,890 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-02 12:24:31,891 INFO L378 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 2 case distinctions, treesize of input 23 treesize of output 29 [2024-11-02 12:24:31,907 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-02 12:24:31,907 INFO L378 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 30 treesize of output 33 [2024-11-02 12:24:31,930 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-02 12:24:31,930 INFO L378 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 13 treesize of output 12 [2024-11-02 12:24:31,943 INFO L378 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 [2024-11-02 12:24:33,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:24:33,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069616271] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:24:33,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [991940884] [2024-11-02 12:24:33,769 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-02 12:24:33,769 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:24:33,770 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:24:33,770 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:24:33,770 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:24:35,693 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:24:45,732 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1414#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) 0) 0)) (<= 4 (select |#length| |ULTIMATE.start_main_~p~0#1.base|)) (exists ((|v_#memory_int_41| (Array Int (Array Int Int))) (|v_#memory_int_42| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_44| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_44| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_43| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~p~0#1.base_88| Int) (|v_ULTIMATE.start_main_~p~0#1.offset_75| Int) (|v_#memory_$Pointer$.base_45| (Array Int (Array Int Int)))) (and (= |#memory_int| (store |v_#memory_int_42| |v_ULTIMATE.start_main_~p~0#1.base_88| (store (select |v_#memory_int_42| |v_ULTIMATE.start_main_~p~0#1.base_88|) (+ |v_ULTIMATE.start_main_~p~0#1.offset_75| 4) (select (select |#memory_int| |v_ULTIMATE.start_main_~p~0#1.base_88|) (+ |v_ULTIMATE.start_main_~p~0#1.offset_75| 4))))) (= |v_#memory_int_42| (store |v_#memory_int_41| |v_ULTIMATE.start_main_~p~0#1.base_88| (store (select |v_#memory_int_41| |v_ULTIMATE.start_main_~p~0#1.base_88|) |v_ULTIMATE.start_main_~p~0#1.offset_75| (select (select |v_#memory_int_42| |v_ULTIMATE.start_main_~p~0#1.base_88|) |v_ULTIMATE.start_main_~p~0#1.offset_75|)))) (<= 0 |v_ULTIMATE.start_main_~p~0#1.offset_75|) (= (store |v_#memory_$Pointer$.base_44| |v_ULTIMATE.start_main_~p~0#1.base_88| (store (select |v_#memory_$Pointer$.base_44| |v_ULTIMATE.start_main_~p~0#1.base_88|) |v_ULTIMATE.start_main_~p~0#1.offset_75| (select (select |v_#memory_$Pointer$.base_45| |v_ULTIMATE.start_main_~p~0#1.base_88|) |v_ULTIMATE.start_main_~p~0#1.offset_75|))) |v_#memory_$Pointer$.base_45|) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_45| |v_ULTIMATE.start_main_~p~0#1.base_88| (store (select |v_#memory_$Pointer$.base_45| |v_ULTIMATE.start_main_~p~0#1.base_88|) (+ |v_ULTIMATE.start_main_~p~0#1.offset_75| 4) 0))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_44| |v_ULTIMATE.start_main_~p~0#1.base_88| (store (select |v_#memory_$Pointer$.offset_44| |v_ULTIMATE.start_main_~p~0#1.base_88|) (+ |v_ULTIMATE.start_main_~p~0#1.offset_75| 4) 0))) (= (store |v_#memory_$Pointer$.offset_43| |v_ULTIMATE.start_main_~p~0#1.base_88| (store (select |v_#memory_$Pointer$.offset_43| |v_ULTIMATE.start_main_~p~0#1.base_88|) |v_ULTIMATE.start_main_~p~0#1.offset_75| (select (select |v_#memory_$Pointer$.offset_44| |v_ULTIMATE.start_main_~p~0#1.base_88|) |v_ULTIMATE.start_main_~p~0#1.offset_75|))) |v_#memory_$Pointer$.offset_44|) (<= (+ |v_ULTIMATE.start_main_~p~0#1.offset_75| 8) (select |#length| |v_ULTIMATE.start_main_~p~0#1.base_88|)) (= (select |#valid| |v_ULTIMATE.start_main_~p~0#1.base_88|) 1))) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_main_~p~0#1.base|) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~p~0#1.base|) 1) (not (= 0 |ULTIMATE.start_main_~p~0#1.base|)))' at error location [2024-11-02 12:24:45,733 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:24:45,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:24:45,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-11-02 12:24:45,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104987650] [2024-11-02 12:24:45,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:24:45,734 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-02 12:24:45,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:24:45,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-02 12:24:45,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=969, Unknown=7, NotChecked=0, Total=1122 [2024-11-02 12:24:45,737 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:24:47,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:24:47,767 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2024-11-02 12:24:47,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-02 12:24:47,769 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 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 [2024-11-02 12:24:47,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:24:47,769 INFO L225 Difference]: With dead ends: 56 [2024-11-02 12:24:47,769 INFO L226 Difference]: Without dead ends: 56 [2024-11-02 12:24:47,770 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=268, Invalid=1531, Unknown=7, NotChecked=0, Total=1806 [2024-11-02 12:24:47,771 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 78 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:24:47,771 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 124 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 431 Invalid, 1 Unknown, 0 Unchecked, 1.2s Time] [2024-11-02 12:24:47,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-02 12:24:47,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2024-11-02 12:24:47,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 40 states have (on average 1.325) 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) [2024-11-02 12:24:47,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2024-11-02 12:24:47,775 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 18 [2024-11-02 12:24:47,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:24:47,775 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2024-11-02 12:24:47,775 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:24:47,775 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2024-11-02 12:24:47,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-02 12:24:47,776 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:24:47,776 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:24:47,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4045c7c-46e9-4061-ad1c-f3d5dda33723/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-02 12:24:47,980 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4045c7c-46e9-4061-ad1c-f3d5dda33723/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-02 12:24:47,980 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-02 12:24:47,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:24:47,981 INFO L85 PathProgramCache]: Analyzing trace with hash -240839931, now seen corresponding path program 1 times [2024-11-02 12:24:47,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:24:47,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488850141] [2024-11-02 12:24:47,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:24:47,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:24:48,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:24:48,627 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:24:48,627 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:24:48,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488850141] [2024-11-02 12:24:48,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488850141] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:24:48,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133640842] [2024-11-02 12:24:48,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:24:48,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:24:48,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4045c7c-46e9-4061-ad1c-f3d5dda33723/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:24:48,631 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4045c7c-46e9-4061-ad1c-f3d5dda33723/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:24:48,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4045c7c-46e9-4061-ad1c-f3d5dda33723/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-02 12:24:48,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:24:48,741 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-02 12:24:48,743 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:24:48,885 INFO L378 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 8 treesize of output 1 [2024-11-02 12:24:48,893 INFO L378 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 8 treesize of output 1 [2024-11-02 12:24:49,266 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-02 12:24:49,266 INFO L378 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 17 treesize of output 15 [2024-11-02 12:24:49,317 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-02 12:24:49,317 INFO L378 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 17 treesize of output 15 [2024-11-02 12:24:49,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:24:49,404 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:24:49,843 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-02 12:24:49,843 INFO L378 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 62 treesize of output 55 [2024-11-02 12:24:49,853 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-02 12:24:49,853 INFO L378 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 52 treesize of output 46 [2024-11-02 12:24:49,866 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-02 12:24:49,870 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-02 12:24:49,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 68 treesize of output 58 [2024-11-02 12:24:49,879 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-02 12:24:49,880 INFO L378 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 58 treesize of output 52 [2024-11-02 12:24:49,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:24:49,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133640842] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:24:49,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [556698076] [2024-11-02 12:24:49,962 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-02 12:24:49,962 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:24:49,963 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:24:49,963 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:24:49,963 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:24:50,352 INFO L180 IcfgInterpreter]: Interpretation finished