./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-broom/sll-lst-data.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d73c33-932d-4115-b9b3-0cbac446181d/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d73c33-932d-4115-b9b3-0cbac446181d/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d73c33-932d-4115-b9b3-0cbac446181d/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d73c33-932d-4115-b9b3-0cbac446181d/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-broom/sll-lst-data.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d73c33-932d-4115-b9b3-0cbac446181d/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d73c33-932d-4115-b9b3-0cbac446181d/bin/utaipan-verify-t7M7D8N6sZ --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 64bit --witnessprinter.graph.data.programhash 31f7a9efc2cb78d8789da558d79970717791666cb2a6a53f6727ed996af2c74a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:10:18,813 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:10:18,893 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d73c33-932d-4115-b9b3-0cbac446181d/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2023-11-19 05:10:18,898 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:10:18,899 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:10:18,924 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:10:18,925 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:10:18,926 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:10:18,927 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:10:18,927 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:10:18,928 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:10:18,928 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:10:18,929 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:10:18,930 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:10:18,930 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:10:18,931 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:10:18,931 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:10:18,932 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:10:18,932 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:10:18,933 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:10:18,934 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:10:18,934 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:10:18,935 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 05:10:18,936 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 05:10:18,936 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:10:18,937 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:10:18,938 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:10:18,938 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 05:10:18,939 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 05:10:18,939 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 05:10:18,940 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:10:18,940 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 05:10:18,941 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 05:10:18,942 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:10:18,942 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:10:18,943 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:10:18,943 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:10:18,944 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:10:18,944 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:10:18,945 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:10:18,945 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:10:18,946 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:10:18,946 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:10:18,947 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_33d73c33-932d-4115-b9b3-0cbac446181d/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d73c33-932d-4115-b9b3-0cbac446181d/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 31f7a9efc2cb78d8789da558d79970717791666cb2a6a53f6727ed996af2c74a [2023-11-19 05:10:19,190 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:10:19,223 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:10:19,226 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:10:19,227 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:10:19,229 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:10:19,230 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d73c33-932d-4115-b9b3-0cbac446181d/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/memsafety-broom/sll-lst-data.i [2023-11-19 05:10:22,931 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:10:23,373 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:10:23,378 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d73c33-932d-4115-b9b3-0cbac446181d/sv-benchmarks/c/memsafety-broom/sll-lst-data.i [2023-11-19 05:10:23,433 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d73c33-932d-4115-b9b3-0cbac446181d/bin/utaipan-verify-t7M7D8N6sZ/data/a63635786/9c9e0903e45f4f58957992fca52d2bcd/FLAG660a8c23d [2023-11-19 05:10:23,450 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d73c33-932d-4115-b9b3-0cbac446181d/bin/utaipan-verify-t7M7D8N6sZ/data/a63635786/9c9e0903e45f4f58957992fca52d2bcd [2023-11-19 05:10:23,453 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:10:23,455 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:10:23,456 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:10:23,456 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:10:23,463 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:10:23,464 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:10:23" (1/1) ... [2023-11-19 05:10:23,465 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@195fdfc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:23, skipping insertion in model container [2023-11-19 05:10:23,465 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:10:23" (1/1) ... [2023-11-19 05:10:23,581 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:10:23,809 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-19 05:10:23,985 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:10:23,996 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:10:24,024 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-19 05:10:24,055 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:10:24,085 WARN L675 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 05:10:24,093 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:10:24,094 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:24 WrapperNode [2023-11-19 05:10:24,094 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:10:24,096 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:10:24,096 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:10:24,096 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:10:24,104 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:24" (1/1) ... [2023-11-19 05:10:24,139 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:24" (1/1) ... [2023-11-19 05:10:24,172 INFO L138 Inliner]: procedures = 122, calls = 19, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 65 [2023-11-19 05:10:24,172 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:10:24,173 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:10:24,173 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:10:24,173 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:10:24,182 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:24" (1/1) ... [2023-11-19 05:10:24,182 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:24" (1/1) ... [2023-11-19 05:10:24,193 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:24" (1/1) ... [2023-11-19 05:10:24,194 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:24" (1/1) ... [2023-11-19 05:10:24,211 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:24" (1/1) ... [2023-11-19 05:10:24,214 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:24" (1/1) ... [2023-11-19 05:10:24,216 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:24" (1/1) ... [2023-11-19 05:10:24,217 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:24" (1/1) ... [2023-11-19 05:10:24,220 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:10:24,221 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:10:24,221 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:10:24,221 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:10:24,222 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:24" (1/1) ... [2023-11-19 05:10:24,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:10:24,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d73c33-932d-4115-b9b3-0cbac446181d/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:10:24,261 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d73c33-932d-4115-b9b3-0cbac446181d/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:10:24,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d73c33-932d-4115-b9b3-0cbac446181d/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:10:24,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 05:10:24,309 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero [2023-11-19 05:10:24,309 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero [2023-11-19 05:10:24,309 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 05:10:24,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 05:10:24,310 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 05:10:24,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 05:10:24,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:10:24,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:10:24,444 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:10:24,445 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:10:24,719 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:10:24,800 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:10:24,807 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-19 05:10:24,812 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:10:24 BoogieIcfgContainer [2023-11-19 05:10:24,812 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:10:24,815 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:10:24,815 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:10:24,818 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:10:24,819 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:10:23" (1/3) ... [2023-11-19 05:10:24,820 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25f844af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:10:24, skipping insertion in model container [2023-11-19 05:10:24,820 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:24" (2/3) ... [2023-11-19 05:10:24,820 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25f844af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:10:24, skipping insertion in model container [2023-11-19 05:10:24,820 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:10:24" (3/3) ... [2023-11-19 05:10:24,822 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-lst-data.i [2023-11-19 05:10:24,841 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:10:24,841 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2023-11-19 05:10:24,887 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:10:24,894 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@79fca6c8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:10:24,894 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-11-19 05:10:24,898 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 20 states have (on average 2.2) internal successors, (44), 40 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 05:10:24,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-19 05:10:24,905 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:10:24,905 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-19 05:10:24,906 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-19 05:10:24,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:10:24,911 INFO L85 PathProgramCache]: Analyzing trace with hash 4082330, now seen corresponding path program 1 times [2023-11-19 05:10:24,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:10:24,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48056110] [2023-11-19 05:10:24,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:10:24,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:10:25,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:10:25,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:10:25,123 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:10:25,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48056110] [2023-11-19 05:10:25,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48056110] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:10:25,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:10:25,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:10:25,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567813357] [2023-11-19 05:10:25,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:10:25,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:10:25,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:10:25,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:10:25,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:10:25,173 INFO L87 Difference]: Start difference. First operand has 44 states, 20 states have (on average 2.2) internal successors, (44), 40 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:10:25,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:10:25,293 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2023-11-19 05:10:25,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:10:25,295 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-19 05:10:25,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:10:25,303 INFO L225 Difference]: With dead ends: 43 [2023-11-19 05:10:25,303 INFO L226 Difference]: Without dead ends: 42 [2023-11-19 05:10:25,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:10:25,309 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:10:25,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 49 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:10:25,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-19 05:10:25,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2023-11-19 05:10:25,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 20 states have (on average 2.05) internal successors, (41), 38 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 05:10:25,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2023-11-19 05:10:25,349 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 4 [2023-11-19 05:10:25,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:10:25,350 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2023-11-19 05:10:25,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:10:25,350 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2023-11-19 05:10:25,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-19 05:10:25,351 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:10:25,351 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-19 05:10:25,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:10:25,352 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-19 05:10:25,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:10:25,353 INFO L85 PathProgramCache]: Analyzing trace with hash 4082331, now seen corresponding path program 1 times [2023-11-19 05:10:25,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:10:25,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120363475] [2023-11-19 05:10:25,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:10:25,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:10:25,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:10:25,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:10:25,517 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:10:25,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120363475] [2023-11-19 05:10:25,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120363475] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:10:25,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:10:25,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:10:25,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429313418] [2023-11-19 05:10:25,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:10:25,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:10:25,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:10:25,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:10:25,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:10:25,524 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:10:25,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:10:25,584 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2023-11-19 05:10:25,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:10:25,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-19 05:10:25,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:10:25,586 INFO L225 Difference]: With dead ends: 41 [2023-11-19 05:10:25,586 INFO L226 Difference]: Without dead ends: 41 [2023-11-19 05:10:25,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:10:25,588 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:10:25,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 52 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:10:25,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-19 05:10:25,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-11-19 05:10:25,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 20 states have (on average 2.0) internal successors, (40), 37 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 05:10:25,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2023-11-19 05:10:25,595 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 4 [2023-11-19 05:10:25,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:10:25,595 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2023-11-19 05:10:25,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:10:25,596 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2023-11-19 05:10:25,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-19 05:10:25,596 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:10:25,596 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:10:25,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:10:25,597 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-19 05:10:25,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:10:25,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1360739041, now seen corresponding path program 1 times [2023-11-19 05:10:25,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:10:25,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464857117] [2023-11-19 05:10:25,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:10:25,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:10:25,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:10:25,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:10:25,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:10:25,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464857117] [2023-11-19 05:10:25,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464857117] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:10:25,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:10:25,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:10:25,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322291020] [2023-11-19 05:10:25,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:10:25,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:10:25,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:10:25,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:10:25,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:10:25,780 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 05:10:25,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:10:25,867 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2023-11-19 05:10:25,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:10:25,868 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2023-11-19 05:10:25,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:10:25,870 INFO L225 Difference]: With dead ends: 42 [2023-11-19 05:10:25,870 INFO L226 Difference]: Without dead ends: 42 [2023-11-19 05:10:25,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:10:25,872 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:10:25,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 60 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:10:25,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-19 05:10:25,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2023-11-19 05:10:25,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 20 states have (on average 1.85) internal successors, (37), 34 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 05:10:25,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2023-11-19 05:10:25,881 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 7 [2023-11-19 05:10:25,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:10:25,882 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2023-11-19 05:10:25,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 05:10:25,882 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2023-11-19 05:10:25,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-19 05:10:25,883 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:10:25,883 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:10:25,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 05:10:25,883 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-19 05:10:25,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:10:25,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1360739042, now seen corresponding path program 1 times [2023-11-19 05:10:25,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:10:25,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39390549] [2023-11-19 05:10:25,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:10:25,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:10:25,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:10:26,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:10:26,113 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:10:26,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39390549] [2023-11-19 05:10:26,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39390549] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:10:26,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:10:26,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 05:10:26,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206196100] [2023-11-19 05:10:26,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:10:26,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:10:26,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:10:26,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:10:26,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:10:26,117 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 6 states, 4 states have (on average 1.25) internal successors, (5), 5 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 05:10:26,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:10:26,229 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2023-11-19 05:10:26,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:10:26,230 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 5 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2023-11-19 05:10:26,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:10:26,232 INFO L225 Difference]: With dead ends: 41 [2023-11-19 05:10:26,233 INFO L226 Difference]: Without dead ends: 41 [2023-11-19 05:10:26,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:10:26,245 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 5 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:10:26,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 89 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:10:26,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-19 05:10:26,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2023-11-19 05:10:26,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.8) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 05:10:26,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2023-11-19 05:10:26,250 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 7 [2023-11-19 05:10:26,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:10:26,251 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2023-11-19 05:10:26,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 5 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 05:10:26,251 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2023-11-19 05:10:26,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-19 05:10:26,252 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:10:26,252 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:10:26,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 05:10:26,252 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-19 05:10:26,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:10:26,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1169418231, now seen corresponding path program 1 times [2023-11-19 05:10:26,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:10:26,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073603015] [2023-11-19 05:10:26,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:10:26,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:10:26,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:10:26,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:10:26,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:10:26,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073603015] [2023-11-19 05:10:26,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073603015] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:10:26,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:10:26,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 05:10:26,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745395604] [2023-11-19 05:10:26,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:10:26,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:10:26,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:10:26,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:10:26,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:10:26,458 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 6 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 05:10:26,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:10:26,549 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2023-11-19 05:10:26,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:10:26,550 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-11-19 05:10:26,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:10:26,552 INFO L225 Difference]: With dead ends: 44 [2023-11-19 05:10:26,552 INFO L226 Difference]: Without dead ends: 44 [2023-11-19 05:10:26,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:10:26,556 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:10:26,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 81 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:10:26,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-19 05:10:26,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2023-11-19 05:10:26,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 25 states have (on average 1.76) internal successors, (44), 38 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 05:10:26,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2023-11-19 05:10:26,575 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 12 [2023-11-19 05:10:26,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:10:26,576 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2023-11-19 05:10:26,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 05:10:26,576 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2023-11-19 05:10:26,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-19 05:10:26,577 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:10:26,577 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:10:26,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 05:10:26,577 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-19 05:10:26,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:10:26,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1169418232, now seen corresponding path program 1 times [2023-11-19 05:10:26,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:10:26,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036426572] [2023-11-19 05:10:26,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:10:26,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:10:26,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:10:26,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:10:26,884 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:10:26,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036426572] [2023-11-19 05:10:26,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036426572] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:10:26,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:10:26,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:10:26,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121691665] [2023-11-19 05:10:26,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:10:26,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:10:26,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:10:26,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:10:26,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:10:26,887 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 7 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 05:10:27,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:10:27,044 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2023-11-19 05:10:27,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:10:27,045 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-11-19 05:10:27,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:10:27,048 INFO L225 Difference]: With dead ends: 43 [2023-11-19 05:10:27,048 INFO L226 Difference]: Without dead ends: 43 [2023-11-19 05:10:27,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:10:27,053 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:10:27,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 105 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:10:27,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-19 05:10:27,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2023-11-19 05:10:27,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 25 states have (on average 1.72) internal successors, (43), 38 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 05:10:27,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2023-11-19 05:10:27,062 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 12 [2023-11-19 05:10:27,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:10:27,063 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2023-11-19 05:10:27,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 05:10:27,063 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2023-11-19 05:10:27,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-19 05:10:27,064 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:10:27,064 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:10:27,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 05:10:27,065 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-19 05:10:27,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:10:27,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1892240989, now seen corresponding path program 1 times [2023-11-19 05:10:27,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:10:27,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251520559] [2023-11-19 05:10:27,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:10:27,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:10:27,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:10:27,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:10:27,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:10:27,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251520559] [2023-11-19 05:10:27,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251520559] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:10:27,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:10:27,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 05:10:27,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640971161] [2023-11-19 05:10:27,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:10:27,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:10:27,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:10:27,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:10:27,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:10:27,171 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 05:10:27,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:10:27,241 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2023-11-19 05:10:27,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:10:27,242 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-11-19 05:10:27,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:10:27,243 INFO L225 Difference]: With dead ends: 46 [2023-11-19 05:10:27,243 INFO L226 Difference]: Without dead ends: 46 [2023-11-19 05:10:27,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:10:27,244 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 15 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:10:27,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 142 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:10:27,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-19 05:10:27,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2023-11-19 05:10:27,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 39 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 05:10:27,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2023-11-19 05:10:27,250 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 13 [2023-11-19 05:10:27,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:10:27,250 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2023-11-19 05:10:27,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 05:10:27,251 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2023-11-19 05:10:27,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-19 05:10:27,252 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:10:27,252 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:10:27,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 05:10:27,252 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-19 05:10:27,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:10:27,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1419910916, now seen corresponding path program 1 times [2023-11-19 05:10:27,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:10:27,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205223988] [2023-11-19 05:10:27,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:10:27,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:10:27,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:10:27,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:10:27,469 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:10:27,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205223988] [2023-11-19 05:10:27,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205223988] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:10:27,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907383787] [2023-11-19 05:10:27,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:10:27,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:10:27,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d73c33-932d-4115-b9b3-0cbac446181d/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:10:27,475 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d73c33-932d-4115-b9b3-0cbac446181d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:10:27,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d73c33-932d-4115-b9b3-0cbac446181d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:10:27,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:10:27,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 05:10:27,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:10:27,703 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_~pi~0.base (select |c_#valid| alloc_and_zero_~pi~0.base))))) is different from true [2023-11-19 05:10:27,766 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-19 05:10:27,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-19 05:10:27,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:10:27,775 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:10:27,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907383787] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:10:27,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:10:27,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 8 [2023-11-19 05:10:27,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137205540] [2023-11-19 05:10:27,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:10:27,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:10:27,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:10:27,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:10:27,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=42, Unknown=1, NotChecked=12, Total=72 [2023-11-19 05:10:27,778 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 05:10:27,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:10:27,835 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2023-11-19 05:10:27,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:10:27,835 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14 [2023-11-19 05:10:27,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:10:27,837 INFO L225 Difference]: With dead ends: 46 [2023-11-19 05:10:27,837 INFO L226 Difference]: Without dead ends: 46 [2023-11-19 05:10:27,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=42, Unknown=1, NotChecked=12, Total=72 [2023-11-19 05:10:27,839 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 9 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:10:27,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 45 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 55 Unchecked, 0.0s Time] [2023-11-19 05:10:27,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-19 05:10:27,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2023-11-19 05:10:27,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 40 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 05:10:27,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2023-11-19 05:10:27,851 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 14 [2023-11-19 05:10:27,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:10:27,852 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2023-11-19 05:10:27,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 05:10:27,853 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2023-11-19 05:10:27,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-19 05:10:27,854 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:10:27,854 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:10:27,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d73c33-932d-4115-b9b3-0cbac446181d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:10:28,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d73c33-932d-4115-b9b3-0cbac446181d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:10:28,068 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-19 05:10:28,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:10:28,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1419910915, now seen corresponding path program 1 times [2023-11-19 05:10:28,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:10:28,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531133325] [2023-11-19 05:10:28,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:10:28,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:10:28,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:10:28,531 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:10:28,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:10:28,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531133325] [2023-11-19 05:10:28,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531133325] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:10:28,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671950522] [2023-11-19 05:10:28,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:10:28,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:10:28,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d73c33-932d-4115-b9b3-0cbac446181d/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:10:28,535 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d73c33-932d-4115-b9b3-0cbac446181d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:10:28,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d73c33-932d-4115-b9b3-0cbac446181d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:10:28,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:10:28,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-19 05:10:28,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:10:28,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 05:10:28,796 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2023-11-19 05:10:28,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:10:28,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 9 [2023-11-19 05:10:28,831 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-19 05:10:28,832 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 [2023-11-19 05:10:28,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-11-19 05:10:28,836 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:10:29,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671950522] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:10:29,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1841505316] [2023-11-19 05:10:29,024 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-11-19 05:10:29,024 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:10:29,033 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:10:29,039 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:10:29,039 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:10:29,674 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 90 for LOIs [2023-11-19 05:10:29,781 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:10:34,093 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '876#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_create_~now~0#1.offset| 0) (or (and (not (= |ULTIMATE.start_create_~sll~0#1.base| 0)) (<= (+ |ULTIMATE.start_create_#t~ret7#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#valid_60| (Array Int Int))) (= (select |v_#valid_60| |ULTIMATE.start_create_~sll~0#1.base|) 0)) (= |ULTIMATE.start_create_~sll~0#1.base| |ULTIMATE.start_create_~now~0#1.base|) (exists ((|v_#memory_int_37| (Array Int (Array Int Int))) (|v_old(#memory_int)_AFTER_CALL_7| (Array Int (Array Int Int))) (|v_#memory_int_38| (Array Int (Array Int Int)))) (and (= |v_#memory_int_38| (store |v_#memory_int_37| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_int_37| |ULTIMATE.start_create_~sll~0#1.base|) 4 (select (select |v_#memory_int_38| |ULTIMATE.start_create_~sll~0#1.base|) 4)))) (<= (select (select |v_old(#memory_int)_AFTER_CALL_7| |ULTIMATE.start_create_~now~0#1.base|) 0) 2147483647) (= (store |v_#memory_int_38| |ULTIMATE.start_create_~now~0#1.base| (store (select |v_#memory_int_38| |ULTIMATE.start_create_~now~0#1.base|) 0 (select (select |v_old(#memory_int)_AFTER_CALL_7| |ULTIMATE.start_create_~now~0#1.base|) 0))) |v_old(#memory_int)_AFTER_CALL_7|) (<= 0 (+ (select (select |v_old(#memory_int)_AFTER_CALL_7| |ULTIMATE.start_create_~now~0#1.base|) 0) 2147483648)))) (exists ((|v_#memory_int_39| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_39| |ULTIMATE.start_create_#t~ret7#1.base| (store (select |v_#memory_int_39| |ULTIMATE.start_create_#t~ret7#1.base|) 4 (select (select |#memory_int| |ULTIMATE.start_create_#t~ret7#1.base|) 4))))) (exists ((|v_#valid_59| (Array Int Int))) (and (= (store |v_#valid_59| |ULTIMATE.start_create_#t~ret7#1.base| 1) |#valid|) (= (select |v_#valid_59| |ULTIMATE.start_create_#t~ret7#1.base|) 0))) (<= (+ |ULTIMATE.start_create_~sll~0#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#memory_$Pointer$.offset_51| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.offset)_AFTER_CALL_7| (Array Int (Array Int Int)))) (= |v_old(#memory_$Pointer$.offset)_AFTER_CALL_7| (store (store |v_#memory_$Pointer$.offset_51| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_$Pointer$.offset_51| |ULTIMATE.start_create_~sll~0#1.base|) 4 0)) |ULTIMATE.start_create_~now~0#1.base| (store (select (store |v_#memory_$Pointer$.offset_51| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_$Pointer$.offset_51| |ULTIMATE.start_create_~sll~0#1.base|) 4 0)) |ULTIMATE.start_create_~now~0#1.base|) 0 (select (select |v_old(#memory_$Pointer$.offset)_AFTER_CALL_7| |ULTIMATE.start_create_~now~0#1.base|) 0))))) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (exists ((|v_#memory_$Pointer$.base_49| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_49| |ULTIMATE.start_create_#t~ret7#1.base| (store (select |v_#memory_$Pointer$.base_49| |ULTIMATE.start_create_#t~ret7#1.base|) 4 0)))) (not (= |ULTIMATE.start_create_#t~ret7#1.base| 0)) (exists ((|v_ULTIMATE.start_create_#t~nondet6#1_12| Int)) (and (<= |v_ULTIMATE.start_create_#t~nondet6#1_12| 2147483647) (<= 0 (+ |v_ULTIMATE.start_create_#t~nondet6#1_12| 2147483648)) (not (= |v_ULTIMATE.start_create_#t~nondet6#1_12| 0)))) (exists ((|v_#memory_$Pointer$.base_51| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.base)_AFTER_CALL_7| (Array Int (Array Int Int)))) (= |v_old(#memory_$Pointer$.base)_AFTER_CALL_7| (store (store |v_#memory_$Pointer$.base_51| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_$Pointer$.base_51| |ULTIMATE.start_create_~sll~0#1.base|) 4 0)) |ULTIMATE.start_create_~now~0#1.base| (store (select (store |v_#memory_$Pointer$.base_51| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_$Pointer$.base_51| |ULTIMATE.start_create_~sll~0#1.base|) 4 0)) |ULTIMATE.start_create_~now~0#1.base|) 0 (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_7| |ULTIMATE.start_create_~now~0#1.base|) 0))))) (exists ((|v_#length_50| (Array Int Int))) (= (store |v_#length_50| |ULTIMATE.start_create_#t~ret7#1.base| 12) |#length|)) (exists ((|v_#memory_$Pointer$.offset_49| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_49| |ULTIMATE.start_create_#t~ret7#1.base| (store (select |v_#memory_$Pointer$.offset_49| |ULTIMATE.start_create_#t~ret7#1.base|) 4 0))))) (and (exists ((|v_#memory_int_37| (Array Int (Array Int Int))) (|v_#memory_int_38| (Array Int (Array Int Int))) (|v_old(#memory_int)_AFTER_CALL_8| (Array Int (Array Int Int)))) (and (= (store |v_#memory_int_38| |ULTIMATE.start_create_~now~0#1.base| (store (select |v_#memory_int_38| |ULTIMATE.start_create_~now~0#1.base|) 0 (select (select |v_old(#memory_int)_AFTER_CALL_8| |ULTIMATE.start_create_~now~0#1.base|) 0))) |v_old(#memory_int)_AFTER_CALL_8|) (= |v_#memory_int_38| (store |v_#memory_int_37| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_int_37| |ULTIMATE.start_create_~sll~0#1.base|) 4 (select (select |v_#memory_int_38| |ULTIMATE.start_create_~sll~0#1.base|) 4)))) (<= 0 (+ (select (select |v_old(#memory_int)_AFTER_CALL_8| |ULTIMATE.start_create_~now~0#1.base|) 0) 2147483648)) (<= (select (select |v_old(#memory_int)_AFTER_CALL_8| |ULTIMATE.start_create_~now~0#1.base|) 0) 2147483647))) (not (= |ULTIMATE.start_create_~sll~0#1.base| 0)) (exists ((|v_#memory_int_40| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_40| |ULTIMATE.start_create_#t~ret7#1.base| (store (select |v_#memory_int_40| |ULTIMATE.start_create_#t~ret7#1.base|) 4 (select (select |#memory_int| |ULTIMATE.start_create_#t~ret7#1.base|) 4))))) (<= (+ |ULTIMATE.start_create_#t~ret7#1.base| 1) |#StackHeapBarrier|) (= |ULTIMATE.start_create_~sll~0#1.base| |ULTIMATE.start_create_~now~0#1.base|) (exists ((|v_#valid_61| (Array Int Int))) (and (= (select |v_#valid_61| |ULTIMATE.start_create_#t~ret7#1.base|) 0) (= (store |v_#valid_61| |ULTIMATE.start_create_#t~ret7#1.base| 1) |#valid|))) (exists ((|v_#memory_$Pointer$.base_52| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.base)_AFTER_CALL_8| (Array Int (Array Int Int)))) (= |v_old(#memory_$Pointer$.base)_AFTER_CALL_8| (store (store |v_#memory_$Pointer$.base_52| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_$Pointer$.base_52| |ULTIMATE.start_create_~sll~0#1.base|) 4 0)) |ULTIMATE.start_create_~now~0#1.base| (store (select (store |v_#memory_$Pointer$.base_52| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_$Pointer$.base_52| |ULTIMATE.start_create_~sll~0#1.base|) 4 0)) |ULTIMATE.start_create_~now~0#1.base|) 0 (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_8| |ULTIMATE.start_create_~now~0#1.base|) 0))))) (<= (+ |ULTIMATE.start_create_~sll~0#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#length_51| (Array Int Int))) (= (store |v_#length_51| |ULTIMATE.start_create_#t~ret7#1.base| 12) |#length|)) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (exists ((|v_#memory_$Pointer$.base_49| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_49| |ULTIMATE.start_create_#t~ret7#1.base| (store (select |v_#memory_$Pointer$.base_49| |ULTIMATE.start_create_#t~ret7#1.base|) 4 0)))) (exists ((|v_#valid_59| (Array Int Int))) (= (select |v_#valid_59| |ULTIMATE.start_create_~sll~0#1.base|) 0)) (not (= |ULTIMATE.start_create_#t~ret7#1.base| 0)) (exists ((|v_ULTIMATE.start_create_#t~nondet6#1_12| Int)) (and (<= |v_ULTIMATE.start_create_#t~nondet6#1_12| 2147483647) (<= 0 (+ |v_ULTIMATE.start_create_#t~nondet6#1_12| 2147483648)) (not (= |v_ULTIMATE.start_create_#t~nondet6#1_12| 0)))) (exists ((|v_#memory_$Pointer$.offset_49| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_49| |ULTIMATE.start_create_#t~ret7#1.base| (store (select |v_#memory_$Pointer$.offset_49| |ULTIMATE.start_create_#t~ret7#1.base|) 4 0)))) (exists ((|v_#memory_$Pointer$.offset_52| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.offset)_AFTER_CALL_8| (Array Int (Array Int Int)))) (= (store (store |v_#memory_$Pointer$.offset_52| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_$Pointer$.offset_52| |ULTIMATE.start_create_~sll~0#1.base|) 4 0)) |ULTIMATE.start_create_~now~0#1.base| (store (select (store |v_#memory_$Pointer$.offset_52| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_$Pointer$.offset_52| |ULTIMATE.start_create_~sll~0#1.base|) 4 0)) |ULTIMATE.start_create_~now~0#1.base|) 0 (select (select |v_old(#memory_$Pointer$.offset)_AFTER_CALL_8| |ULTIMATE.start_create_~now~0#1.base|) 0))) |v_old(#memory_$Pointer$.offset)_AFTER_CALL_8|)))) (= |ULTIMATE.start_create_~sll~0#1.offset| 0) (= |ULTIMATE.start_create_#t~ret7#1.offset| 0) (<= (select |#length| |ULTIMATE.start_create_~now~0#1.base|) 11))' at error location [2023-11-19 05:10:34,093 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:10:34,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 05:10:34,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2023-11-19 05:10:34,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140809307] [2023-11-19 05:10:34,094 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 05:10:34,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 05:10:34,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:10:34,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 05:10:34,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=559, Unknown=3, NotChecked=48, Total=702 [2023-11-19 05:10:34,096 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 15 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 05:10:34,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:10:34,399 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2023-11-19 05:10:34,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 05:10:34,404 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 14 [2023-11-19 05:10:34,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:10:34,405 INFO L225 Difference]: With dead ends: 50 [2023-11-19 05:10:34,405 INFO L226 Difference]: Without dead ends: 50 [2023-11-19 05:10:34,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=110, Invalid=647, Unknown=3, NotChecked=52, Total=812 [2023-11-19 05:10:34,407 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 7 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:10:34,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 135 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 213 Invalid, 0 Unknown, 50 Unchecked, 0.2s Time] [2023-11-19 05:10:34,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-19 05:10:34,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2023-11-19 05:10:34,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 43 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 05:10:34,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2023-11-19 05:10:34,412 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 14 [2023-11-19 05:10:34,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:10:34,413 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2023-11-19 05:10:34,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 05:10:34,413 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2023-11-19 05:10:34,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-19 05:10:34,414 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:10:34,414 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:10:34,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d73c33-932d-4115-b9b3-0cbac446181d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:10:34,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d73c33-932d-4115-b9b3-0cbac446181d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:10:34,636 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-19 05:10:34,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:10:34,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1470468008, now seen corresponding path program 1 times [2023-11-19 05:10:34,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:10:34,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306840697] [2023-11-19 05:10:34,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:10:34,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:10:34,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:10:35,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:10:35,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:10:35,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306840697] [2023-11-19 05:10:35,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306840697] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:10:35,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039607093] [2023-11-19 05:10:35,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:10:35,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:10:35,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d73c33-932d-4115-b9b3-0cbac446181d/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:10:35,080 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d73c33-932d-4115-b9b3-0cbac446181d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:10:35,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d73c33-932d-4115-b9b3-0cbac446181d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:10:35,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:10:35,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-19 05:10:35,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:10:35,179 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 13 treesize of output 9 [2023-11-19 05:10:35,184 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 13 treesize of output 9 [2023-11-19 05:10:35,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:10:35,305 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 25 treesize of output 13 [2023-11-19 05:10:35,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:10:35,313 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 25 treesize of output 13 [2023-11-19 05:10:35,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:10:35,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:10:35,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:10:35,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039607093] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:10:35,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1179454519] [2023-11-19 05:10:35,598 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-11-19 05:10:35,598 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:10:35,599 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:10:35,599 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:10:35,599 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:10:36,017 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2023-11-19 05:10:36,029 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:10:37,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1179454519] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:10:37,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:10:37,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9, 8, 8] total 24 [2023-11-19 05:10:37,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730236388] [2023-11-19 05:10:37,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:10:37,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 05:10:37,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:10:37,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 05:10:37,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=464, Unknown=10, NotChecked=0, Total=552 [2023-11-19 05:10:37,868 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 12 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 05:10:38,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:10:38,697 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2023-11-19 05:10:38,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 05:10:38,700 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-11-19 05:10:38,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:10:38,701 INFO L225 Difference]: With dead ends: 53 [2023-11-19 05:10:38,701 INFO L226 Difference]: Without dead ends: 53 [2023-11-19 05:10:38,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=78, Invalid=464, Unknown=10, NotChecked=0, Total=552 [2023-11-19 05:10:38,703 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 1 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 05:10:38,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 65 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 05:10:38,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-19 05:10:38,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2023-11-19 05:10:38,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 33 states have (on average 1.606060606060606) internal successors, (53), 46 states have internal predecessors, (53), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 05:10:38,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2023-11-19 05:10:38,709 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 14 [2023-11-19 05:10:38,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:10:38,710 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2023-11-19 05:10:38,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 05:10:38,710 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2023-11-19 05:10:38,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-19 05:10:38,711 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:10:38,711 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:10:38,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d73c33-932d-4115-b9b3-0cbac446181d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 05:10:38,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d73c33-932d-4115-b9b3-0cbac446181d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:10:38,916 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-19 05:10:38,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:10:38,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1660146204, now seen corresponding path program 1 times [2023-11-19 05:10:38,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:10:38,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532301024] [2023-11-19 05:10:38,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:10:38,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:10:38,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:10:38,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:10:38,998 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:10:38,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532301024] [2023-11-19 05:10:38,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532301024] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:10:38,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:10:38,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 05:10:38,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808412792] [2023-11-19 05:10:38,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:10:39,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 05:10:39,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:10:39,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 05:10:39,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:10:39,001 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 05:10:39,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:10:39,096 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2023-11-19 05:10:39,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 05:10:39,097 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-11-19 05:10:39,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:10:39,098 INFO L225 Difference]: With dead ends: 61 [2023-11-19 05:10:39,098 INFO L226 Difference]: Without dead ends: 61 [2023-11-19 05:10:39,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-19 05:10:39,099 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 46 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:10:39,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 116 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:10:39,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-19 05:10:39,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2023-11-19 05:10:39,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.588235294117647) internal successors, (54), 47 states have internal predecessors, (54), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 05:10:39,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2023-11-19 05:10:39,103 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 15 [2023-11-19 05:10:39,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:10:39,104 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2023-11-19 05:10:39,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 05:10:39,104 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2023-11-19 05:10:39,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-19 05:10:39,105 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:10:39,105 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:10:39,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 05:10:39,105 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-19 05:10:39,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:10:39,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1660145043, now seen corresponding path program 1 times [2023-11-19 05:10:39,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:10:39,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276737920] [2023-11-19 05:10:39,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:10:39,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:10:39,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:10:39,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:10:39,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:10:39,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276737920] [2023-11-19 05:10:39,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276737920] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:10:39,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:10:39,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:10:39,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276987595] [2023-11-19 05:10:39,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:10:39,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:10:39,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:10:39,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:10:39,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:10:39,192 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 7 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 05:10:39,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:10:39,307 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2023-11-19 05:10:39,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 05:10:39,308 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-11-19 05:10:39,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:10:39,309 INFO L225 Difference]: With dead ends: 60 [2023-11-19 05:10:39,309 INFO L226 Difference]: Without dead ends: 60 [2023-11-19 05:10:39,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:10:39,309 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 19 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:10:39,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 75 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:10:39,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-19 05:10:39,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2023-11-19 05:10:39,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 48 states have internal predecessors, (56), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 05:10:39,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2023-11-19 05:10:39,314 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 15 [2023-11-19 05:10:39,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:10:39,314 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2023-11-19 05:10:39,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 05:10:39,314 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2023-11-19 05:10:39,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-19 05:10:39,315 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:10:39,315 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:10:39,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 05:10:39,315 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-19 05:10:39,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:10:39,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1660145044, now seen corresponding path program 1 times [2023-11-19 05:10:39,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:10:39,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926699066] [2023-11-19 05:10:39,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:10:39,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:10:39,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:10:39,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:10:39,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:10:39,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926699066] [2023-11-19 05:10:39,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926699066] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:10:39,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:10:39,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 05:10:39,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852355711] [2023-11-19 05:10:39,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:10:39,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 05:10:39,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:10:39,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 05:10:39,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:10:39,527 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 05:10:39,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:10:39,696 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2023-11-19 05:10:39,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 05:10:39,696 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-11-19 05:10:39,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:10:39,697 INFO L225 Difference]: With dead ends: 69 [2023-11-19 05:10:39,697 INFO L226 Difference]: Without dead ends: 69 [2023-11-19 05:10:39,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-19 05:10:39,698 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 24 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:10:39,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 82 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:10:39,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-11-19 05:10:39,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2023-11-19 05:10:39,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 49 states have internal predecessors, (56), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 05:10:39,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2023-11-19 05:10:39,703 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 15 [2023-11-19 05:10:39,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:10:39,703 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2023-11-19 05:10:39,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 05:10:39,704 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2023-11-19 05:10:39,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-19 05:10:39,704 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:10:39,704 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:10:39,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-19 05:10:39,705 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-19 05:10:39,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:10:39,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1265282458, now seen corresponding path program 1 times [2023-11-19 05:10:39,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:10:39,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621730511] [2023-11-19 05:10:39,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:10:39,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:10:39,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:10:39,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:10:39,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:10:39,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621730511] [2023-11-19 05:10:39,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621730511] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:10:39,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:10:39,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 05:10:39,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066984724] [2023-11-19 05:10:39,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:10:39,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:10:39,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:10:39,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:10:39,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:10:39,809 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 6 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 05:10:39,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:10:39,897 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2023-11-19 05:10:39,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:10:39,898 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2023-11-19 05:10:39,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:10:39,898 INFO L225 Difference]: With dead ends: 54 [2023-11-19 05:10:39,898 INFO L226 Difference]: Without dead ends: 54 [2023-11-19 05:10:39,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:10:39,900 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:10:39,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 78 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:10:39,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-19 05:10:39,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-11-19 05:10:39,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 37 states have (on average 1.4594594594594594) internal successors, (54), 48 states have internal predecessors, (54), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 05:10:39,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2023-11-19 05:10:39,911 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 16 [2023-11-19 05:10:39,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:10:39,911 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2023-11-19 05:10:39,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 05:10:39,912 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2023-11-19 05:10:39,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-19 05:10:39,912 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:10:39,912 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:10:39,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-19 05:10:39,913 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-19 05:10:39,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:10:39,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1265282459, now seen corresponding path program 1 times [2023-11-19 05:10:39,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:10:39,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872071440] [2023-11-19 05:10:39,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:10:39,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:10:39,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:10:40,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:10:40,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:10:40,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872071440] [2023-11-19 05:10:40,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872071440] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:10:40,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:10:40,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:10:40,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783306823] [2023-11-19 05:10:40,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:10:40,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:10:40,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:10:40,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:10:40,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:10:40,117 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 7 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 05:10:40,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:10:40,229 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2023-11-19 05:10:40,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:10:40,230 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2023-11-19 05:10:40,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:10:40,230 INFO L225 Difference]: With dead ends: 53 [2023-11-19 05:10:40,231 INFO L226 Difference]: Without dead ends: 53 [2023-11-19 05:10:40,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-19 05:10:40,232 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 5 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:10:40,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 99 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:10:40,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-19 05:10:40,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-11-19 05:10:40,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 37 states have (on average 1.4054054054054055) internal successors, (52), 47 states have internal predecessors, (52), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 05:10:40,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2023-11-19 05:10:40,235 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 16 [2023-11-19 05:10:40,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:10:40,236 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2023-11-19 05:10:40,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 05:10:40,236 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2023-11-19 05:10:40,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-19 05:10:40,237 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:10:40,237 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:10:40,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-19 05:10:40,238 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-19 05:10:40,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:10:40,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1966549008, now seen corresponding path program 1 times [2023-11-19 05:10:40,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:10:40,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387700329] [2023-11-19 05:10:40,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:10:40,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:10:40,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:10:40,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:10:40,333 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:10:40,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387700329] [2023-11-19 05:10:40,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387700329] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:10:40,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:10:40,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 05:10:40,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378150472] [2023-11-19 05:10:40,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:10:40,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 05:10:40,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:10:40,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 05:10:40,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:10:40,336 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand has 8 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 05:10:40,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:10:40,451 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2023-11-19 05:10:40,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 05:10:40,451 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-11-19 05:10:40,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:10:40,452 INFO L225 Difference]: With dead ends: 59 [2023-11-19 05:10:40,452 INFO L226 Difference]: Without dead ends: 59 [2023-11-19 05:10:40,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-19 05:10:40,453 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 32 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:10:40,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 97 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:10:40,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-19 05:10:40,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2023-11-19 05:10:40,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.45) internal successors, (58), 50 states have internal predecessors, (58), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 05:10:40,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2023-11-19 05:10:40,457 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 17 [2023-11-19 05:10:40,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:10:40,457 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2023-11-19 05:10:40,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 05:10:40,458 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2023-11-19 05:10:40,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-19 05:10:40,459 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:10:40,459 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:10:40,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-19 05:10:40,459 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-19 05:10:40,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:10:40,460 INFO L85 PathProgramCache]: Analyzing trace with hash 2107694927, now seen corresponding path program 1 times [2023-11-19 05:10:40,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:10:40,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546456851] [2023-11-19 05:10:40,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:10:40,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:10:40,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:10:40,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:10:40,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:10:40,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546456851] [2023-11-19 05:10:40,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546456851] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:10:40,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366133844] [2023-11-19 05:10:40,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:10:40,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:10:40,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d73c33-932d-4115-b9b3-0cbac446181d/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:10:40,619 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d73c33-932d-4115-b9b3-0cbac446181d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:10:40,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d73c33-932d-4115-b9b3-0cbac446181d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 05:10:40,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:10:40,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-19 05:10:40,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:10:40,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-19 05:10:40,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:10:40,826 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:10:40,898 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_create_#t~ret4#1.base_21| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_create_#t~ret4#1.base_21|) 0)) (= |c_ULTIMATE.start_main_old_#valid#1| (store |c_#valid| |v_ULTIMATE.start_create_#t~ret4#1.base_21| 0)))) is different from false [2023-11-19 05:10:40,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366133844] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:10:40,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1221512502] [2023-11-19 05:10:40,903 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-11-19 05:10:40,903 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:10:40,904 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:10:40,904 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:10:40,904 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:10:42,028 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2023-11-19 05:10:42,038 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:10:45,760 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2057#(and (not (= |ULTIMATE.start_create_#res#1.base| 0)) (exists ((|v_#memory_$Pointer$.offset_72| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_72| |ULTIMATE.start_create_#res#1.base| (store (store (select |v_#memory_$Pointer$.offset_72| |ULTIMATE.start_create_#res#1.base|) 4 0) 0 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_create_#res#1.base|) 0))))) (<= 1 |#StackHeapBarrier|) (exists ((|v_#length_63| (Array Int Int))) (= (store |v_#length_63| |ULTIMATE.start_create_#res#1.base| 12) |#length|)) (= |ULTIMATE.start_main_~l~0#1.offset| 0) (exists ((|v_#memory_$Pointer$.base_72| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_72| |ULTIMATE.start_create_#res#1.base| (store (store (select |v_#memory_$Pointer$.base_72| |ULTIMATE.start_create_#res#1.base|) 4 0) 0 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 0))) |#memory_$Pointer$.base|)) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (<= (+ |ULTIMATE.start_main_~l~0#1.base| 1) |#StackHeapBarrier|) (= |ULTIMATE.start_create_#res#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (exists ((|v_#memory_int_56| (Array Int (Array Int Int))) (|v_#memory_int_57| (Array Int (Array Int Int)))) (and (= |#memory_int| (store |v_#memory_int_57| |ULTIMATE.start_create_#res#1.base| (store (select |v_#memory_int_57| |ULTIMATE.start_create_#res#1.base|) 0 (select (select |#memory_int| |ULTIMATE.start_create_#res#1.base|) 0)))) (= |v_#memory_int_57| (store |v_#memory_int_56| |ULTIMATE.start_create_#res#1.base| (store (select |v_#memory_int_56| |ULTIMATE.start_create_#res#1.base|) 4 (select (select |v_#memory_int_57| |ULTIMATE.start_create_#res#1.base|) 4)))))) (exists ((|v_#valid_78| (Array Int Int))) (and (= (select |v_#valid_78| |ULTIMATE.start_create_#res#1.base|) 0) (= (store (store |v_#valid_78| |ULTIMATE.start_create_#res#1.base| 1) |ULTIMATE.start_main_~l~0#1.base| 0) |#valid|))) (<= (select (select |#memory_int| |ULTIMATE.start_create_#res#1.base|) 0) 2147483647) (= |ULTIMATE.start_main_~l~0#1.base| |ULTIMATE.start_create_#res#1.base|) (= |ULTIMATE.start_main_#res#1| 0) (<= 0 (+ (select (select |#memory_int| |ULTIMATE.start_create_#res#1.base|) 0) 2147483648)))' at error location [2023-11-19 05:10:45,760 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:10:45,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 05:10:45,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2023-11-19 05:10:45,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529899091] [2023-11-19 05:10:45,761 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 05:10:45,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 05:10:45,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:10:45,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 05:10:45,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=589, Unknown=1, NotChecked=48, Total=702 [2023-11-19 05:10:45,763 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 05:10:46,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:10:46,061 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2023-11-19 05:10:46,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 05:10:46,061 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-11-19 05:10:46,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:10:46,062 INFO L225 Difference]: With dead ends: 68 [2023-11-19 05:10:46,063 INFO L226 Difference]: Without dead ends: 67 [2023-11-19 05:10:46,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=78, Invalid=737, Unknown=1, NotChecked=54, Total=870 [2023-11-19 05:10:46,064 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 32 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:10:46,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 122 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:10:46,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-19 05:10:46,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2023-11-19 05:10:46,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 43 states have (on average 1.4186046511627908) internal successors, (61), 53 states have internal predecessors, (61), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 05:10:46,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2023-11-19 05:10:46,069 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 20 [2023-11-19 05:10:46,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:10:46,069 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2023-11-19 05:10:46,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 05:10:46,070 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2023-11-19 05:10:46,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-19 05:10:46,070 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:10:46,071 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:10:46,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d73c33-932d-4115-b9b3-0cbac446181d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 05:10:46,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d73c33-932d-4115-b9b3-0cbac446181d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-19 05:10:46,284 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-19 05:10:46,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:10:46,284 INFO L85 PathProgramCache]: Analyzing trace with hash 2107693766, now seen corresponding path program 1 times [2023-11-19 05:10:46,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:10:46,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638505667] [2023-11-19 05:10:46,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:10:46,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:10:46,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:10:46,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:10:46,876 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:10:46,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638505667] [2023-11-19 05:10:46,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638505667] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:10:46,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763280830] [2023-11-19 05:10:46,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:10:46,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:10:46,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d73c33-932d-4115-b9b3-0cbac446181d/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:10:46,879 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d73c33-932d-4115-b9b3-0cbac446181d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:10:46,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d73c33-932d-4115-b9b3-0cbac446181d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 05:10:47,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:10:47,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-19 05:10:47,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:10:47,019 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 [2023-11-19 05:10:47,027 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 [2023-11-19 05:10:47,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:10:47,146 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 [2023-11-19 05:10:47,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:10:47,153 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 [2023-11-19 05:10:47,280 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 05:10:47,281 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 [2023-11-19 05:10:47,295 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 05:10:47,295 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 [2023-11-19 05:10:47,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:10:47,347 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:10:47,913 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 37 [2023-11-19 05:10:47,916 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 37 treesize of output 35 [2023-11-19 05:10:47,923 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 111 treesize of output 107 [2023-11-19 05:10:47,939 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 80 treesize of output 78 [2023-11-19 05:10:47,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:10:47,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763280830] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:10:47,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1035181631] [2023-11-19 05:10:47,968 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-11-19 05:10:47,969 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:10:47,969 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:10:47,969 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:10:47,969 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:10:49,038 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2023-11-19 05:10:49,047 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:10:52,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1035181631] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:10:52,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:10:52,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13, 12, 12] total 36 [2023-11-19 05:10:52,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59222822] [2023-11-19 05:10:52,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:10:52,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 05:10:52,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:10:52,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 05:10:52,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1121, Unknown=17, NotChecked=0, Total=1260 [2023-11-19 05:10:52,438 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 15 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 05:10:53,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:10:53,229 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2023-11-19 05:10:53,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 05:10:53,230 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-11-19 05:10:53,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:10:53,231 INFO L225 Difference]: With dead ends: 64 [2023-11-19 05:10:53,231 INFO L226 Difference]: Without dead ends: 64 [2023-11-19 05:10:53,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=122, Invalid=1121, Unknown=17, NotChecked=0, Total=1260 [2023-11-19 05:10:53,232 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 05:10:53,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 39 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 05:10:53,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-19 05:10:53,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2023-11-19 05:10:53,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 58 states have internal predecessors, (67), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 05:10:53,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2023-11-19 05:10:53,237 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 20 [2023-11-19 05:10:53,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:10:53,237 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2023-11-19 05:10:53,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 05:10:53,238 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2023-11-19 05:10:53,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-19 05:10:53,238 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:10:53,239 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:10:53,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d73c33-932d-4115-b9b3-0cbac446181d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-19 05:10:53,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d73c33-932d-4115-b9b3-0cbac446181d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-19 05:10:53,452 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-19 05:10:53,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:10:53,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1825689392, now seen corresponding path program 1 times [2023-11-19 05:10:53,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:10:53,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033499169] [2023-11-19 05:10:53,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:10:53,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:10:53,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:10:53,549 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 05:10:53,549 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:10:53,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033499169] [2023-11-19 05:10:53,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033499169] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:10:53,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786484019] [2023-11-19 05:10:53,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:10:53,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:10:53,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d73c33-932d-4115-b9b3-0cbac446181d/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:10:53,551 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d73c33-932d-4115-b9b3-0cbac446181d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:10:53,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d73c33-932d-4115-b9b3-0cbac446181d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 05:10:53,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:10:53,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-19 05:10:53,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:10:53,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 05:10:53,703 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:10:53,725 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-19 05:10:53,726 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 12 treesize of output 11 [2023-11-19 05:10:53,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 05:10:53,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786484019] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:10:53,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1615576402] [2023-11-19 05:10:53,748 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-11-19 05:10:53,748 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:10:53,748 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:10:53,749 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:10:53,749 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:10:59,909 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 24 for LOIs [2023-11-19 05:10:59,931 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:11:13,234 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2615#(and (= |ULTIMATE.start_main_~l~0#1.offset| |ULTIMATE.start_create_#res#1.offset|) (= |ULTIMATE.start_loop_#in~x#1.base| |ULTIMATE.start_loop_~x#1.base|) (not (= (select |#valid| |ULTIMATE.start_loop_~x#1.base|) 1)) (= |ULTIMATE.start_main_~l~0#1.base| |ULTIMATE.start_loop_#in~x#1.base|) (= |ULTIMATE.start_main_~l~0#1.offset| |ULTIMATE.start_loop_#in~x#1.offset|) (exists ((|v_ULTIMATE.start_create_~now~0#1.base_44| Int) (|v_#memory_$Pointer$.offset_105| (Array Int (Array Int Int))) (|v_#memory_int_85| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_105| (Array Int (Array Int Int))) (|v_ULTIMATE.start_create_~now~0#1.offset_40| Int)) (and (= (select |#valid| (select (select |v_#memory_$Pointer$.base_105| |v_ULTIMATE.start_create_~now~0#1.base_44|) (+ 4 |v_ULTIMATE.start_create_~now~0#1.offset_40|))) 1) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_105| (select (select |v_#memory_$Pointer$.base_105| |v_ULTIMATE.start_create_~now~0#1.base_44|) (+ 4 |v_ULTIMATE.start_create_~now~0#1.offset_40|)) (store (select |v_#memory_$Pointer$.base_105| (select (select |v_#memory_$Pointer$.base_105| |v_ULTIMATE.start_create_~now~0#1.base_44|) (+ 4 |v_ULTIMATE.start_create_~now~0#1.offset_40|))) (select (select |v_#memory_$Pointer$.offset_105| |v_ULTIMATE.start_create_~now~0#1.base_44|) (+ 4 |v_ULTIMATE.start_create_~now~0#1.offset_40|)) (select (select |#memory_$Pointer$.base| (select (select |v_#memory_$Pointer$.base_105| |v_ULTIMATE.start_create_~now~0#1.base_44|) (+ 4 |v_ULTIMATE.start_create_~now~0#1.offset_40|))) (select (select |v_#memory_$Pointer$.offset_105| |v_ULTIMATE.start_create_~now~0#1.base_44|) (+ 4 |v_ULTIMATE.start_create_~now~0#1.offset_40|)))))) (<= 0 (+ (select (select |#memory_int| (select (select |v_#memory_$Pointer$.base_105| |v_ULTIMATE.start_create_~now~0#1.base_44|) (+ 4 |v_ULTIMATE.start_create_~now~0#1.offset_40|))) (select (select |v_#memory_$Pointer$.offset_105| |v_ULTIMATE.start_create_~now~0#1.base_44|) (+ 4 |v_ULTIMATE.start_create_~now~0#1.offset_40|))) 2147483648)) (<= 0 (+ 4 |v_ULTIMATE.start_create_~now~0#1.offset_40|)) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_105| (select (select |v_#memory_$Pointer$.base_105| |v_ULTIMATE.start_create_~now~0#1.base_44|) (+ 4 |v_ULTIMATE.start_create_~now~0#1.offset_40|)) (store (select |v_#memory_$Pointer$.offset_105| (select (select |v_#memory_$Pointer$.base_105| |v_ULTIMATE.start_create_~now~0#1.base_44|) (+ 4 |v_ULTIMATE.start_create_~now~0#1.offset_40|))) (select (select |v_#memory_$Pointer$.offset_105| |v_ULTIMATE.start_create_~now~0#1.base_44|) (+ 4 |v_ULTIMATE.start_create_~now~0#1.offset_40|)) (select (select |#memory_$Pointer$.offset| (select (select |v_#memory_$Pointer$.base_105| |v_ULTIMATE.start_create_~now~0#1.base_44|) (+ 4 |v_ULTIMATE.start_create_~now~0#1.offset_40|))) (select (select |v_#memory_$Pointer$.offset_105| |v_ULTIMATE.start_create_~now~0#1.base_44|) (+ 4 |v_ULTIMATE.start_create_~now~0#1.offset_40|)))))) (<= 0 (select (select |v_#memory_$Pointer$.offset_105| |v_ULTIMATE.start_create_~now~0#1.base_44|) (+ 4 |v_ULTIMATE.start_create_~now~0#1.offset_40|))) (<= (+ 4 (select (select |v_#memory_$Pointer$.offset_105| |v_ULTIMATE.start_create_~now~0#1.base_44|) (+ 4 |v_ULTIMATE.start_create_~now~0#1.offset_40|))) (select |#length| (select (select |v_#memory_$Pointer$.base_105| |v_ULTIMATE.start_create_~now~0#1.base_44|) (+ 4 |v_ULTIMATE.start_create_~now~0#1.offset_40|)))) (= (select |#valid| |v_ULTIMATE.start_create_~now~0#1.base_44|) 1) (<= (+ 12 |v_ULTIMATE.start_create_~now~0#1.offset_40|) (select |#length| |v_ULTIMATE.start_create_~now~0#1.base_44|)) (= |#memory_int| (store |v_#memory_int_85| (select (select |v_#memory_$Pointer$.base_105| |v_ULTIMATE.start_create_~now~0#1.base_44|) (+ 4 |v_ULTIMATE.start_create_~now~0#1.offset_40|)) (store (select |v_#memory_int_85| (select (select |v_#memory_$Pointer$.base_105| |v_ULTIMATE.start_create_~now~0#1.base_44|) (+ 4 |v_ULTIMATE.start_create_~now~0#1.offset_40|))) (select (select |v_#memory_$Pointer$.offset_105| |v_ULTIMATE.start_create_~now~0#1.base_44|) (+ 4 |v_ULTIMATE.start_create_~now~0#1.offset_40|)) (select (select |#memory_int| (select (select |v_#memory_$Pointer$.base_105| |v_ULTIMATE.start_create_~now~0#1.base_44|) (+ 4 |v_ULTIMATE.start_create_~now~0#1.offset_40|))) (select (select |v_#memory_$Pointer$.offset_105| |v_ULTIMATE.start_create_~now~0#1.base_44|) (+ 4 |v_ULTIMATE.start_create_~now~0#1.offset_40|)))))) (<= (select (select |#memory_int| (select (select |v_#memory_$Pointer$.base_105| |v_ULTIMATE.start_create_~now~0#1.base_44|) (+ 4 |v_ULTIMATE.start_create_~now~0#1.offset_40|))) (select (select |v_#memory_$Pointer$.offset_105| |v_ULTIMATE.start_create_~now~0#1.base_44|) (+ 4 |v_ULTIMATE.start_create_~now~0#1.offset_40|))) 2147483647))) (= |ULTIMATE.start_loop_~x#1.offset| |ULTIMATE.start_loop_#in~x#1.offset|) (or (not (= |ULTIMATE.start_loop_~x#1.base| 0)) (not (= |ULTIMATE.start_loop_~x#1.offset| 0))) (= |ULTIMATE.start_main_~l~0#1.base| |ULTIMATE.start_create_#res#1.base|))' at error location [2023-11-19 05:11:13,235 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:11:13,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:11:13,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2023-11-19 05:11:13,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845107003] [2023-11-19 05:11:13,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:11:13,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:11:13,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:11:13,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:11:13,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=362, Unknown=10, NotChecked=0, Total=420 [2023-11-19 05:11:13,236 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 05:11:13,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:11:13,387 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2023-11-19 05:11:13,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:11:13,387 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-11-19 05:11:13,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:11:13,388 INFO L225 Difference]: With dead ends: 72 [2023-11-19 05:11:13,388 INFO L226 Difference]: Without dead ends: 72 [2023-11-19 05:11:13,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=48, Invalid=362, Unknown=10, NotChecked=0, Total=420 [2023-11-19 05:11:13,389 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 5 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:11:13,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 81 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:11:13,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-19 05:11:13,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2023-11-19 05:11:13,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 53 states have (on average 1.3962264150943395) internal successors, (74), 63 states have internal predecessors, (74), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 05:11:13,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 80 transitions. [2023-11-19 05:11:13,394 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 80 transitions. Word has length 22 [2023-11-19 05:11:13,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:11:13,394 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 80 transitions. [2023-11-19 05:11:13,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 05:11:13,394 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 80 transitions. [2023-11-19 05:11:13,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-19 05:11:13,395 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:11:13,395 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:11:13,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d73c33-932d-4115-b9b3-0cbac446181d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 05:11:13,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d73c33-932d-4115-b9b3-0cbac446181d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:11:13,604 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-19 05:11:13,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:11:13,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1825689391, now seen corresponding path program 1 times [2023-11-19 05:11:13,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:11:13,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967067956] [2023-11-19 05:11:13,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:11:13,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:11:13,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:11:13,915 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:11:13,915 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:11:13,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967067956] [2023-11-19 05:11:13,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967067956] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:11:13,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901489646] [2023-11-19 05:11:13,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:11:13,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:11:13,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d73c33-932d-4115-b9b3-0cbac446181d/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:11:13,917 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d73c33-932d-4115-b9b3-0cbac446181d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:11:13,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d73c33-932d-4115-b9b3-0cbac446181d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 05:11:14,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:11:14,015 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-19 05:11:14,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:11:14,267 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:11:14,267 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:11:14,385 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 05:11:14,386 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 21 treesize of output 25 [2023-11-19 05:11:14,631 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:11:14,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901489646] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:11:14,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1399961432] [2023-11-19 05:11:14,634 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-11-19 05:11:14,634 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:11:14,634 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:11:14,635 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:11:14,635 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs