./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-broom/dll-middle-data.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2d5f4-2e84-440f-947f-02a04a879cdb/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2d5f4-2e84-440f-947f-02a04a879cdb/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2d5f4-2e84-440f-947f-02a04a879cdb/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2d5f4-2e84-440f-947f-02a04a879cdb/bin/utaipan-verify-QoSU8krkJ5/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-broom/dll-middle-data.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2d5f4-2e84-440f-947f-02a04a879cdb/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2d5f4-2e84-440f-947f-02a04a879cdb/bin/utaipan-verify-QoSU8krkJ5 --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 55fed19fd46c3c3877aeb4601619875fca08ed123cdc32456163a7ce3c0dda73 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 19:40:56,429 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 19:40:56,547 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2d5f4-2e84-440f-947f-02a04a879cdb/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2023-11-21 19:40:56,555 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 19:40:56,556 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 19:40:56,609 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 19:40:56,609 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 19:40:56,610 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 19:40:56,611 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 19:40:56,616 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 19:40:56,616 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 19:40:56,617 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 19:40:56,618 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 19:40:56,619 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 19:40:56,620 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 19:40:56,620 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 19:40:56,621 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 19:40:56,621 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 19:40:56,622 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 19:40:56,622 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 19:40:56,622 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 19:40:56,623 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 19:40:56,623 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 19:40:56,624 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 19:40:56,625 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 19:40:56,625 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 19:40:56,625 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 19:40:56,626 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 19:40:56,626 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 19:40:56,627 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 19:40:56,628 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 19:40:56,628 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 19:40:56,628 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 19:40:56,628 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 19:40:56,629 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 19:40:56,629 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 19:40:56,629 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 19:40:56,629 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:40:56,630 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 19:40:56,630 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 19:40:56,630 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 19:40:56,630 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 19:40:56,631 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 19:40:56,631 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 19:40:56,631 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 19:40:56,631 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_80b2d5f4-2e84-440f-947f-02a04a879cdb/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2d5f4-2e84-440f-947f-02a04a879cdb/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 55fed19fd46c3c3877aeb4601619875fca08ed123cdc32456163a7ce3c0dda73 [2023-11-21 19:40:56,986 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 19:40:57,031 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 19:40:57,033 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 19:40:57,035 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 19:40:57,035 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 19:40:57,036 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2d5f4-2e84-440f-947f-02a04a879cdb/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/memsafety-broom/dll-middle-data.i [2023-11-21 19:41:00,125 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 19:41:00,474 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 19:41:00,475 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2d5f4-2e84-440f-947f-02a04a879cdb/sv-benchmarks/c/memsafety-broom/dll-middle-data.i [2023-11-21 19:41:00,510 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2d5f4-2e84-440f-947f-02a04a879cdb/bin/utaipan-verify-QoSU8krkJ5/data/3e5e32522/1e1e0ceffb3d49ebb2ac7d332f6fd1f1/FLAGee2349b9e [2023-11-21 19:41:00,528 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2d5f4-2e84-440f-947f-02a04a879cdb/bin/utaipan-verify-QoSU8krkJ5/data/3e5e32522/1e1e0ceffb3d49ebb2ac7d332f6fd1f1 [2023-11-21 19:41:00,531 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 19:41:00,532 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 19:41:00,534 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 19:41:00,534 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 19:41:00,541 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 19:41:00,542 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:41:00" (1/1) ... [2023-11-21 19:41:00,543 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79297dda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:41:00, skipping insertion in model container [2023-11-21 19:41:00,544 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:41:00" (1/1) ... [2023-11-21 19:41:00,621 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:41:00,793 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-21 19:41:00,987 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:41:00,998 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 19:41:01,018 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-21 19:41:01,040 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:41:01,066 WARN L675 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:41:01,075 INFO L206 MainTranslator]: Completed translation [2023-11-21 19:41:01,075 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:41:01 WrapperNode [2023-11-21 19:41:01,076 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 19:41:01,077 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 19:41:01,077 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 19:41:01,077 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 19:41:01,084 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:41:01" (1/1) ... [2023-11-21 19:41:01,099 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:41:01" (1/1) ... [2023-11-21 19:41:01,128 INFO L138 Inliner]: procedures = 122, calls = 27, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 80 [2023-11-21 19:41:01,129 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 19:41:01,130 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 19:41:01,130 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 19:41:01,130 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 19:41:01,140 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:41:01" (1/1) ... [2023-11-21 19:41:01,141 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:41:01" (1/1) ... [2023-11-21 19:41:01,145 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:41:01" (1/1) ... [2023-11-21 19:41:01,145 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:41:01" (1/1) ... [2023-11-21 19:41:01,154 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:41:01" (1/1) ... [2023-11-21 19:41:01,158 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:41:01" (1/1) ... [2023-11-21 19:41:01,160 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:41:01" (1/1) ... [2023-11-21 19:41:01,162 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:41:01" (1/1) ... [2023-11-21 19:41:01,165 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 19:41:01,166 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 19:41:01,166 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 19:41:01,167 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 19:41:01,167 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:41:01" (1/1) ... [2023-11-21 19:41:01,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:41:01,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2d5f4-2e84-440f-947f-02a04a879cdb/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:41:01,204 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2d5f4-2e84-440f-947f-02a04a879cdb/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 19:41:01,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2d5f4-2e84-440f-947f-02a04a879cdb/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 19:41:01,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 19:41:01,256 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero [2023-11-21 19:41:01,257 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero [2023-11-21 19:41:01,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 19:41:01,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-21 19:41:01,259 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-21 19:41:01,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 19:41:01,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 19:41:01,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 19:41:01,429 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 19:41:01,431 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 19:41:01,801 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 19:41:01,882 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 19:41:01,882 INFO L308 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-21 19:41:01,884 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:41:01 BoogieIcfgContainer [2023-11-21 19:41:01,884 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 19:41:01,886 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 19:41:01,887 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 19:41:01,890 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 19:41:01,890 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 07:41:00" (1/3) ... [2023-11-21 19:41:01,891 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@92b1462 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:41:01, skipping insertion in model container [2023-11-21 19:41:01,891 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:41:01" (2/3) ... [2023-11-21 19:41:01,891 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@92b1462 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:41:01, skipping insertion in model container [2023-11-21 19:41:01,892 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:41:01" (3/3) ... [2023-11-21 19:41:01,894 INFO L112 eAbstractionObserver]: Analyzing ICFG dll-middle-data.i [2023-11-21 19:41:01,915 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 19:41:01,915 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 36 error locations. [2023-11-21 19:41:01,976 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:41:01,984 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;@67a085c4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:41:01,984 INFO L358 AbstractCegarLoop]: Starting to check reachability of 36 error locations. [2023-11-21 19:41:01,989 INFO L276 IsEmpty]: Start isEmpty. Operand has 68 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 64 states have internal predecessors, (68), 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) [2023-11-21 19:41:01,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-21 19:41:01,996 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:41:01,997 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-21 19:41:01,998 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-11-21 19:41:02,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:41:02,006 INFO L85 PathProgramCache]: Analyzing trace with hash 5092341, now seen corresponding path program 1 times [2023-11-21 19:41:02,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:41:02,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47639234] [2023-11-21 19:41:02,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:02,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:41:02,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:02,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:41:02,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:41:02,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47639234] [2023-11-21 19:41:02,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47639234] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:41:02,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:41:02,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 19:41:02,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778378066] [2023-11-21 19:41:02,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:41:02,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:41:02,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:41:02,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:41:02,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:41:02,368 INFO L87 Difference]: Start difference. First operand has 68 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 64 states have internal predecessors, (68), 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) [2023-11-21 19:41:02,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:41:02,490 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2023-11-21 19:41:02,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:41:02,493 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 [2023-11-21 19:41:02,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:41:02,501 INFO L225 Difference]: With dead ends: 64 [2023-11-21 19:41:02,501 INFO L226 Difference]: Without dead ends: 63 [2023-11-21 19:41:02,503 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 [2023-11-21 19:41:02,507 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:41:02,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 65 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:41:02,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-21 19:41:02,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2023-11-21 19:41:02,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 59 states have internal predecessors, (62), 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) [2023-11-21 19:41:02,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2023-11-21 19:41:02,549 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 4 [2023-11-21 19:41:02,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:41:02,550 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2023-11-21 19:41:02,550 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) [2023-11-21 19:41:02,550 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2023-11-21 19:41:02,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-21 19:41:02,551 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:41:02,551 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-21 19:41:02,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 19:41:02,552 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-11-21 19:41:02,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:41:02,553 INFO L85 PathProgramCache]: Analyzing trace with hash 5092342, now seen corresponding path program 1 times [2023-11-21 19:41:02,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:41:02,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943505677] [2023-11-21 19:41:02,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:02,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:41:02,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:02,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:41:02,717 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:41:02,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943505677] [2023-11-21 19:41:02,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943505677] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:41:02,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:41:02,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 19:41:02,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103769885] [2023-11-21 19:41:02,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:41:02,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:41:02,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:41:02,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:41:02,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:41:02,738 INFO L87 Difference]: Start difference. First operand 63 states and 66 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) [2023-11-21 19:41:02,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:41:02,883 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2023-11-21 19:41:02,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:41:02,884 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 [2023-11-21 19:41:02,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:41:02,888 INFO L225 Difference]: With dead ends: 59 [2023-11-21 19:41:02,888 INFO L226 Difference]: Without dead ends: 59 [2023-11-21 19:41:02,892 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 [2023-11-21 19:41:02,894 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 4 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:41:02,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 68 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:41:02,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-21 19:41:02,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-11-21 19:41:02,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 55 states have internal predecessors, (58), 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) [2023-11-21 19:41:02,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2023-11-21 19:41:02,912 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 4 [2023-11-21 19:41:02,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:41:02,913 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2023-11-21 19:41:02,913 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) [2023-11-21 19:41:02,913 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2023-11-21 19:41:02,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-21 19:41:02,915 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:41:02,915 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:41:02,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 19:41:02,915 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-11-21 19:41:02,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:41:02,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1088257845, now seen corresponding path program 1 times [2023-11-21 19:41:02,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:41:02,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427979976] [2023-11-21 19:41:02,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:02,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:41:02,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:03,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:41:03,183 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:41:03,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427979976] [2023-11-21 19:41:03,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427979976] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:41:03,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:41:03,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 19:41:03,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640305363] [2023-11-21 19:41:03,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:41:03,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 19:41:03,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:41:03,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 19:41:03,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:41:03,189 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 6 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 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) [2023-11-21 19:41:03,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:41:03,383 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2023-11-21 19:41:03,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 19:41:03,384 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 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 10 [2023-11-21 19:41:03,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:41:03,386 INFO L225 Difference]: With dead ends: 57 [2023-11-21 19:41:03,387 INFO L226 Difference]: Without dead ends: 57 [2023-11-21 19:41:03,387 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 [2023-11-21 19:41:03,388 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 24 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 19:41:03,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 81 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 19:41:03,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-21 19:41:03,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2023-11-21 19:41:03,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 49 states have internal predecessors, (52), 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) [2023-11-21 19:41:03,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2023-11-21 19:41:03,397 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 10 [2023-11-21 19:41:03,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:41:03,398 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2023-11-21 19:41:03,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 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) [2023-11-21 19:41:03,398 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2023-11-21 19:41:03,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-21 19:41:03,399 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:41:03,399 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:41:03,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 19:41:03,400 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-11-21 19:41:03,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:41:03,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1088257846, now seen corresponding path program 1 times [2023-11-21 19:41:03,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:41:03,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598306653] [2023-11-21 19:41:03,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:03,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:41:03,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:03,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:41:03,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:41:03,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598306653] [2023-11-21 19:41:03,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598306653] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:41:03,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:41:03,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 19:41:03,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860039833] [2023-11-21 19:41:03,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:41:03,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 19:41:03,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:41:03,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 19:41:03,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:41:03,711 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 6 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 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) [2023-11-21 19:41:03,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:41:03,872 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2023-11-21 19:41:03,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 19:41:03,873 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 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 10 [2023-11-21 19:41:03,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:41:03,876 INFO L225 Difference]: With dead ends: 55 [2023-11-21 19:41:03,877 INFO L226 Difference]: Without dead ends: 55 [2023-11-21 19:41:03,877 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 [2023-11-21 19:41:03,887 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:41:03,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 104 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:41:03,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-21 19:41:03,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2023-11-21 19:41:03,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 47 states have internal predecessors, (50), 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) [2023-11-21 19:41:03,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2023-11-21 19:41:03,895 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 10 [2023-11-21 19:41:03,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:41:03,895 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2023-11-21 19:41:03,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 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) [2023-11-21 19:41:03,896 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2023-11-21 19:41:03,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-21 19:41:03,897 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:41:03,897 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:41:03,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 19:41:03,897 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-11-21 19:41:03,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:41:03,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1724489561, now seen corresponding path program 1 times [2023-11-21 19:41:03,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:41:03,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650690763] [2023-11-21 19:41:03,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:03,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:41:03,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:04,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:41:04,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:41:04,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650690763] [2023-11-21 19:41:04,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650690763] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:41:04,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:41:04,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 19:41:04,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120393859] [2023-11-21 19:41:04,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:41:04,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 19:41:04,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:41:04,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 19:41:04,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-21 19:41:04,114 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 7 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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) [2023-11-21 19:41:04,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:41:04,275 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2023-11-21 19:41:04,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 19:41:04,276 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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 16 [2023-11-21 19:41:04,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:41:04,277 INFO L225 Difference]: With dead ends: 58 [2023-11-21 19:41:04,277 INFO L226 Difference]: Without dead ends: 58 [2023-11-21 19:41:04,277 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 [2023-11-21 19:41:04,278 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 3 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:41:04,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 122 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:41:04,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-21 19:41:04,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2023-11-21 19:41:04,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 52 states have internal predecessors, (58), 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) [2023-11-21 19:41:04,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2023-11-21 19:41:04,285 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 16 [2023-11-21 19:41:04,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:41:04,285 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2023-11-21 19:41:04,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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) [2023-11-21 19:41:04,286 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2023-11-21 19:41:04,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-21 19:41:04,286 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:41:04,287 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:41:04,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 19:41:04,287 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-11-21 19:41:04,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:41:04,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1724489562, now seen corresponding path program 1 times [2023-11-21 19:41:04,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:41:04,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326151485] [2023-11-21 19:41:04,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:04,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:41:04,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:04,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:41:04,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:41:04,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326151485] [2023-11-21 19:41:04,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326151485] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:41:04,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:41:04,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 19:41:04,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833468234] [2023-11-21 19:41:04,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:41:04,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 19:41:04,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:41:04,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 19:41:04,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-21 19:41:04,622 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 7 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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) [2023-11-21 19:41:04,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:41:04,816 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2023-11-21 19:41:04,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 19:41:04,825 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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 16 [2023-11-21 19:41:04,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:41:04,826 INFO L225 Difference]: With dead ends: 57 [2023-11-21 19:41:04,826 INFO L226 Difference]: Without dead ends: 57 [2023-11-21 19:41:04,827 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 [2023-11-21 19:41:04,827 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 2 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 19:41:04,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 122 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 19:41:04,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-21 19:41:04,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2023-11-21 19:41:04,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 52 states have internal predecessors, (57), 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) [2023-11-21 19:41:04,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2023-11-21 19:41:04,834 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 16 [2023-11-21 19:41:04,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:41:04,834 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2023-11-21 19:41:04,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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) [2023-11-21 19:41:04,835 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2023-11-21 19:41:04,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-21 19:41:04,835 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:41:04,835 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:41:04,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 19:41:04,836 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-11-21 19:41:04,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:41:04,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1919585171, now seen corresponding path program 1 times [2023-11-21 19:41:04,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:41:04,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719588] [2023-11-21 19:41:04,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:04,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:41:04,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:04,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:41:04,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:41:04,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719588] [2023-11-21 19:41:04,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719588] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:41:04,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:41:04,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-21 19:41:04,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453327842] [2023-11-21 19:41:04,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:41:04,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 19:41:04,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:41:04,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 19:41:04,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-21 19:41:04,976 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 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) [2023-11-21 19:41:05,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:41:05,079 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2023-11-21 19:41:05,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 19:41:05,080 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 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 [2023-11-21 19:41:05,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:41:05,081 INFO L225 Difference]: With dead ends: 60 [2023-11-21 19:41:05,081 INFO L226 Difference]: Without dead ends: 60 [2023-11-21 19:41:05,081 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 [2023-11-21 19:41:05,082 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 25 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:41:05,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 177 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:41:05,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-21 19:41:05,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2023-11-21 19:41:05,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 53 states have internal predecessors, (57), 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) [2023-11-21 19:41:05,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2023-11-21 19:41:05,087 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 17 [2023-11-21 19:41:05,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:41:05,088 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2023-11-21 19:41:05,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 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) [2023-11-21 19:41:05,088 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2023-11-21 19:41:05,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-21 19:41:05,089 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:41:05,089 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:41:05,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-21 19:41:05,089 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-11-21 19:41:05,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:41:05,090 INFO L85 PathProgramCache]: Analyzing trace with hash -622863686, now seen corresponding path program 1 times [2023-11-21 19:41:05,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:41:05,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038548992] [2023-11-21 19:41:05,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:05,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:41:05,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:06,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:41:06,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:41:06,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038548992] [2023-11-21 19:41:06,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038548992] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:41:06,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571092242] [2023-11-21 19:41:06,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:06,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:41:06,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2d5f4-2e84-440f-947f-02a04a879cdb/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:41:06,180 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2d5f4-2e84-440f-947f-02a04a879cdb/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:41:06,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2d5f4-2e84-440f-947f-02a04a879cdb/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 19:41:06,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:06,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 67 conjunts are in the unsatisfiable core [2023-11-21 19:41:06,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:41:06,410 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 [2023-11-21 19:41:06,433 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 [2023-11-21 19:41:06,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-21 19:41:06,490 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 29 treesize of output 13 [2023-11-21 19:41:06,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-21 19:41:06,518 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 [2023-11-21 19:41:06,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-21 19:41:06,568 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 29 treesize of output 13 [2023-11-21 19:41:06,689 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 [2023-11-21 19:41:06,700 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 [2023-11-21 19:41:06,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-21 19:41:06,728 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 29 treesize of output 13 [2023-11-21 19:41:06,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:41:06,816 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:41:06,942 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 20 |c_ULTIMATE.start_create_~now~0#1.offset|)) (.cse1 (+ |c_ULTIMATE.start_create_~dll~0#1.offset| 4))) (and (forall ((v_ArrVal_261 (Array Int Int))) (or (not (= v_ArrVal_261 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base|) .cse0 (select v_ArrVal_261 .cse0)))) (= 0 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base| v_ArrVal_261) |c_ULTIMATE.start_create_~dll~0#1.base|) .cse1)))) (forall ((v_ArrVal_262 (Array Int Int))) (or (not (= v_ArrVal_262 (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_~now~0#1.base|) .cse0 (select v_ArrVal_262 .cse0)))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_~now~0#1.base| v_ArrVal_262) |c_ULTIMATE.start_create_~dll~0#1.base|) .cse1) 0))))) is different from false [2023-11-21 19:41:07,011 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_create_~dll~0#1.offset| 4)) (.cse1 (+ 20 |c_ULTIMATE.start_create_~now~0#1.offset|))) (and (forall ((v_ArrVal_262 (Array Int Int))) (or (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_~now~0#1.base| v_ArrVal_262) |c_ULTIMATE.start_create_~dll~0#1.base|) .cse0) 0) (not (= v_ArrVal_262 (store (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset| (select v_ArrVal_262 |c_ULTIMATE.start_create_~now~0#1.offset|)) .cse1 (select v_ArrVal_262 .cse1)))))) (forall ((v_ArrVal_261 (Array Int Int))) (or (= 0 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base| v_ArrVal_261) |c_ULTIMATE.start_create_~dll~0#1.base|) .cse0)) (not (= v_ArrVal_261 (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset| (select v_ArrVal_261 |c_ULTIMATE.start_create_~now~0#1.offset|)) .cse1 (select v_ArrVal_261 .cse1)))))))) is different from false [2023-11-21 19:41:07,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:41:07,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571092242] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:41:07,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [748004101] [2023-11-21 19:41:07,623 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-11-21 19:41:07,623 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:41:07,629 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:41:07,635 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:41:07,635 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:41:08,772 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2023-11-21 19:41:08,836 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:41:19,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [748004101] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:41:19,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-21 19:41:19,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [10, 9, 10] total 32 [2023-11-21 19:41:19,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463075598] [2023-11-21 19:41:19,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:41:19,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-21 19:41:19,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:41:19,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-21 19:41:19,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=765, Unknown=4, NotChecked=114, Total=992 [2023-11-21 19:41:19,593 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 16 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 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) [2023-11-21 19:41:21,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-21 19:41:27,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:41:27,456 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2023-11-21 19:41:27,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-21 19:41:27,457 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 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 18 [2023-11-21 19:41:27,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:41:27,458 INFO L225 Difference]: With dead ends: 66 [2023-11-21 19:41:27,458 INFO L226 Difference]: Without dead ends: 66 [2023-11-21 19:41:27,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=109, Invalid=765, Unknown=4, NotChecked=114, Total=992 [2023-11-21 19:41:27,460 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 1 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2023-11-21 19:41:27,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 96 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 706 Invalid, 2 Unknown, 0 Unchecked, 7.8s Time] [2023-11-21 19:41:27,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-21 19:41:27,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2023-11-21 19:41:27,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 40 states have (on average 1.6) internal successors, (64), 59 states have internal predecessors, (64), 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) [2023-11-21 19:41:27,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2023-11-21 19:41:27,465 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 18 [2023-11-21 19:41:27,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:41:27,465 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2023-11-21 19:41:27,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 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) [2023-11-21 19:41:27,466 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2023-11-21 19:41:27,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-21 19:41:27,466 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:41:27,466 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:41:27,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2d5f4-2e84-440f-947f-02a04a879cdb/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 19:41:27,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2d5f4-2e84-440f-947f-02a04a879cdb/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:41:27,688 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-11-21 19:41:27,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:41:27,688 INFO L85 PathProgramCache]: Analyzing trace with hash -2128888750, now seen corresponding path program 1 times [2023-11-21 19:41:27,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:41:27,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023324776] [2023-11-21 19:41:27,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:27,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:41:27,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:27,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 19:41:27,874 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:41:27,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023324776] [2023-11-21 19:41:27,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023324776] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:41:27,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:41:27,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-21 19:41:27,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529638888] [2023-11-21 19:41:27,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:41:27,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 19:41:27,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:41:27,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 19:41:27,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-21 19:41:27,876 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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) [2023-11-21 19:41:28,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:41:28,185 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2023-11-21 19:41:28,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 19:41:28,187 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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 19 [2023-11-21 19:41:28,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:41:28,188 INFO L225 Difference]: With dead ends: 73 [2023-11-21 19:41:28,188 INFO L226 Difference]: Without dead ends: 73 [2023-11-21 19:41:28,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-21 19:41:28,189 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 56 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 19:41:28,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 158 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 19:41:28,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-11-21 19:41:28,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 65. [2023-11-21 19:41:28,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 41 states have (on average 1.5853658536585367) internal successors, (65), 60 states have internal predecessors, (65), 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) [2023-11-21 19:41:28,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2023-11-21 19:41:28,199 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 19 [2023-11-21 19:41:28,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:41:28,200 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2023-11-21 19:41:28,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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) [2023-11-21 19:41:28,200 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2023-11-21 19:41:28,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-21 19:41:28,201 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:41:28,201 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:41:28,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-21 19:41:28,202 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-11-21 19:41:28,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:41:28,202 INFO L85 PathProgramCache]: Analyzing trace with hash -2128890097, now seen corresponding path program 1 times [2023-11-21 19:41:28,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:41:28,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130189868] [2023-11-21 19:41:28,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:28,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:41:28,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:28,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 19:41:28,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:41:28,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130189868] [2023-11-21 19:41:28,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130189868] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:41:28,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:41:28,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-21 19:41:28,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006635611] [2023-11-21 19:41:28,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:41:28,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 19:41:28,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:41:28,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 19:41:28,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-21 19:41:28,421 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2023-11-21 19:41:28,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:41:28,851 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2023-11-21 19:41:28,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 19:41:28,851 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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 19 [2023-11-21 19:41:28,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:41:28,852 INFO L225 Difference]: With dead ends: 73 [2023-11-21 19:41:28,852 INFO L226 Difference]: Without dead ends: 73 [2023-11-21 19:41:28,853 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 [2023-11-21 19:41:28,854 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 20 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 19:41:28,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 117 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 19:41:28,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-11-21 19:41:28,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 66. [2023-11-21 19:41:28,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 43 states have (on average 1.558139534883721) internal successors, (67), 61 states have internal predecessors, (67), 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) [2023-11-21 19:41:28,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2023-11-21 19:41:28,860 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 19 [2023-11-21 19:41:28,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:41:28,860 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2023-11-21 19:41:28,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2023-11-21 19:41:28,861 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2023-11-21 19:41:28,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-21 19:41:28,862 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:41:28,862 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:41:28,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-21 19:41:28,862 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-11-21 19:41:28,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:41:28,863 INFO L85 PathProgramCache]: Analyzing trace with hash -2128890096, now seen corresponding path program 1 times [2023-11-21 19:41:28,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:41:28,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491145095] [2023-11-21 19:41:28,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:28,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:41:28,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:29,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 19:41:29,162 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:41:29,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491145095] [2023-11-21 19:41:29,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491145095] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:41:29,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:41:29,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-21 19:41:29,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99781225] [2023-11-21 19:41:29,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:41:29,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 19:41:29,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:41:29,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 19:41:29,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-21 19:41:29,164 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2023-11-21 19:41:29,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:41:29,594 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2023-11-21 19:41:29,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 19:41:29,597 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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 19 [2023-11-21 19:41:29,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:41:29,599 INFO L225 Difference]: With dead ends: 82 [2023-11-21 19:41:29,601 INFO L226 Difference]: Without dead ends: 82 [2023-11-21 19:41:29,601 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 [2023-11-21 19:41:29,603 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 24 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 19:41:29,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 101 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 19:41:29,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-21 19:41:29,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 67. [2023-11-21 19:41:29,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 44 states have (on average 1.5227272727272727) internal successors, (67), 62 states have internal predecessors, (67), 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) [2023-11-21 19:41:29,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2023-11-21 19:41:29,616 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 19 [2023-11-21 19:41:29,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:41:29,617 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2023-11-21 19:41:29,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2023-11-21 19:41:29,617 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2023-11-21 19:41:29,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-21 19:41:29,618 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:41:29,618 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:41:29,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-21 19:41:29,619 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-11-21 19:41:29,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:41:29,619 INFO L85 PathProgramCache]: Analyzing trace with hash 918695024, now seen corresponding path program 1 times [2023-11-21 19:41:29,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:41:29,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527602534] [2023-11-21 19:41:29,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:29,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:41:29,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:29,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:41:29,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:41:29,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527602534] [2023-11-21 19:41:29,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527602534] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:41:29,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371978017] [2023-11-21 19:41:29,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:29,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:41:29,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2d5f4-2e84-440f-947f-02a04a879cdb/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:41:29,965 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2d5f4-2e84-440f-947f-02a04a879cdb/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:41:30,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2d5f4-2e84-440f-947f-02a04a879cdb/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 19:41:30,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:30,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-21 19:41:30,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:41:30,184 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 [2023-11-21 19:41:30,299 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-21 19:41:30,300 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 [2023-11-21 19:41:30,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:41:30,306 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:41:30,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371978017] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:41:30,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:41:30,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 10 [2023-11-21 19:41:30,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87069853] [2023-11-21 19:41:30,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:41:30,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 19:41:30,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:41:30,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 19:41:30,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=69, Unknown=1, NotChecked=16, Total=110 [2023-11-21 19:41:30,308 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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) [2023-11-21 19:41:30,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:41:30,464 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2023-11-21 19:41:30,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 19:41:30,464 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 21 [2023-11-21 19:41:30,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:41:30,465 INFO L225 Difference]: With dead ends: 70 [2023-11-21 19:41:30,465 INFO L226 Difference]: Without dead ends: 70 [2023-11-21 19:41:30,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=69, Unknown=1, NotChecked=16, Total=110 [2023-11-21 19:41:30,466 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 19 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:41:30,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 48 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 74 Unchecked, 0.1s Time] [2023-11-21 19:41:30,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-21 19:41:30,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2023-11-21 19:41:30,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 45 states have (on average 1.5333333333333334) internal successors, (69), 63 states have internal predecessors, (69), 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) [2023-11-21 19:41:30,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2023-11-21 19:41:30,472 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 21 [2023-11-21 19:41:30,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:41:30,472 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2023-11-21 19:41:30,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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) [2023-11-21 19:41:30,473 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2023-11-21 19:41:30,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-21 19:41:30,474 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:41:30,474 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:41:30,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2d5f4-2e84-440f-947f-02a04a879cdb/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 19:41:30,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2d5f4-2e84-440f-947f-02a04a879cdb/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-21 19:41:30,689 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-11-21 19:41:30,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:41:30,689 INFO L85 PathProgramCache]: Analyzing trace with hash 918695025, now seen corresponding path program 1 times [2023-11-21 19:41:30,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:41:30,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155238710] [2023-11-21 19:41:30,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:30,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:41:30,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:31,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:41:31,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:41:31,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155238710] [2023-11-21 19:41:31,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155238710] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:41:31,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042586037] [2023-11-21 19:41:31,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:31,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:41:31,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2d5f4-2e84-440f-947f-02a04a879cdb/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:41:31,242 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2d5f4-2e84-440f-947f-02a04a879cdb/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:41:31,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2d5f4-2e84-440f-947f-02a04a879cdb/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 19:41:31,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:31,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 19:41:31,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:41:31,546 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 [2023-11-21 19:41:31,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:41:31,616 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 16 treesize of output 11 [2023-11-21 19:41:31,632 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-21 19:41:31,633 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 [2023-11-21 19:41:31,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:41:31,675 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:41:31,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042586037] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:41:31,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:41:31,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2023-11-21 19:41:31,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012923861] [2023-11-21 19:41:31,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:41:31,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 19:41:31,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:41:31,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 19:41:31,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=148, Unknown=1, NotChecked=24, Total=210 [2023-11-21 19:41:31,678 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 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) [2023-11-21 19:41:31,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:41:31,970 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2023-11-21 19:41:31,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 19:41:31,971 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 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 21 [2023-11-21 19:41:31,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:41:31,972 INFO L225 Difference]: With dead ends: 82 [2023-11-21 19:41:31,972 INFO L226 Difference]: Without dead ends: 82 [2023-11-21 19:41:31,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=148, Unknown=1, NotChecked=24, Total=210 [2023-11-21 19:41:31,973 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 13 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 19:41:31,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 75 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 158 Invalid, 0 Unknown, 98 Unchecked, 0.3s Time] [2023-11-21 19:41:31,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-21 19:41:31,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2023-11-21 19:41:31,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 52 states have (on average 1.5576923076923077) internal successors, (81), 70 states have internal predecessors, (81), 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) [2023-11-21 19:41:31,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2023-11-21 19:41:31,978 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 21 [2023-11-21 19:41:31,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:41:31,978 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2023-11-21 19:41:31,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 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) [2023-11-21 19:41:31,978 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2023-11-21 19:41:31,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-21 19:41:31,979 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:41:31,979 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, 1] [2023-11-21 19:41:31,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2d5f4-2e84-440f-947f-02a04a879cdb/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 19:41:32,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2d5f4-2e84-440f-947f-02a04a879cdb/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-21 19:41:32,191 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-11-21 19:41:32,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:41:32,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1458913197, now seen corresponding path program 1 times [2023-11-21 19:41:32,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:41:32,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923063889] [2023-11-21 19:41:32,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:32,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:41:32,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:32,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 19:41:32,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:41:32,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923063889] [2023-11-21 19:41:32,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923063889] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:41:32,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:41:32,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-21 19:41:32,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998514776] [2023-11-21 19:41:32,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:41:32,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 19:41:32,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:41:32,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 19:41:32,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-21 19:41:32,402 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 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) [2023-11-21 19:41:32,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:41:32,770 INFO L93 Difference]: Finished difference Result 82 states and 93 transitions. [2023-11-21 19:41:32,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 19:41:32,771 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 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 21 [2023-11-21 19:41:32,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:41:32,772 INFO L225 Difference]: With dead ends: 82 [2023-11-21 19:41:32,772 INFO L226 Difference]: Without dead ends: 82 [2023-11-21 19:41:32,773 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 [2023-11-21 19:41:32,773 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 44 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 19:41:32,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 151 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 19:41:32,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-21 19:41:32,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2023-11-21 19:41:32,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 55 states have (on average 1.5818181818181818) internal successors, (87), 73 states have internal predecessors, (87), 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) [2023-11-21 19:41:32,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 93 transitions. [2023-11-21 19:41:32,778 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 93 transitions. Word has length 21 [2023-11-21 19:41:32,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:41:32,779 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 93 transitions. [2023-11-21 19:41:32,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 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) [2023-11-21 19:41:32,779 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 93 transitions. [2023-11-21 19:41:32,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-21 19:41:32,780 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:41:32,780 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:41:32,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-21 19:41:32,781 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-11-21 19:41:32,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:41:32,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1897252236, now seen corresponding path program 1 times [2023-11-21 19:41:32,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:41:32,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767450005] [2023-11-21 19:41:32,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:32,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:41:32,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:33,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 19:41:33,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:41:33,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767450005] [2023-11-21 19:41:33,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767450005] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:41:33,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:41:33,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 19:41:33,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814163712] [2023-11-21 19:41:33,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:41:33,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 19:41:33,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:41:33,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 19:41:33,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-21 19:41:33,129 INFO L87 Difference]: Start difference. First operand 79 states and 93 transitions. Second operand has 7 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 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) [2023-11-21 19:41:33,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:41:33,475 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2023-11-21 19:41:33,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 19:41:33,477 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 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 23 [2023-11-21 19:41:33,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:41:33,478 INFO L225 Difference]: With dead ends: 78 [2023-11-21 19:41:33,478 INFO L226 Difference]: Without dead ends: 78 [2023-11-21 19:41:33,479 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 [2023-11-21 19:41:33,480 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 7 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 19:41:33,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 115 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 19:41:33,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-21 19:41:33,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2023-11-21 19:41:33,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 55 states have (on average 1.5454545454545454) internal successors, (85), 72 states have internal predecessors, (85), 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) [2023-11-21 19:41:33,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2023-11-21 19:41:33,485 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 23 [2023-11-21 19:41:33,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:41:33,485 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2023-11-21 19:41:33,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 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) [2023-11-21 19:41:33,486 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2023-11-21 19:41:33,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-21 19:41:33,486 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:41:33,487 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:41:33,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-21 19:41:33,487 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-11-21 19:41:33,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:41:33,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1897252237, now seen corresponding path program 1 times [2023-11-21 19:41:33,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:41:33,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524890534] [2023-11-21 19:41:33,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:33,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:41:33,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:33,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 19:41:33,675 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:41:33,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524890534] [2023-11-21 19:41:33,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524890534] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:41:33,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:41:33,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 19:41:33,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090063329] [2023-11-21 19:41:33,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:41:33,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 19:41:33,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:41:33,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 19:41:33,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-21 19:41:33,677 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand has 7 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 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) [2023-11-21 19:41:33,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:41:33,939 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2023-11-21 19:41:33,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 19:41:33,939 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 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 23 [2023-11-21 19:41:33,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:41:33,940 INFO L225 Difference]: With dead ends: 77 [2023-11-21 19:41:33,940 INFO L226 Difference]: Without dead ends: 77 [2023-11-21 19:41:33,941 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 [2023-11-21 19:41:33,941 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 9 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 19:41:33,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 110 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 19:41:33,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-21 19:41:33,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2023-11-21 19:41:33,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 55 states have (on average 1.509090909090909) internal successors, (83), 71 states have internal predecessors, (83), 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) [2023-11-21 19:41:33,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2023-11-21 19:41:33,945 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 23 [2023-11-21 19:41:33,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:41:33,946 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2023-11-21 19:41:33,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 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) [2023-11-21 19:41:33,946 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2023-11-21 19:41:33,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-21 19:41:33,947 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:41:33,947 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, 1, 1, 1, 1] [2023-11-21 19:41:33,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-21 19:41:33,947 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-11-21 19:41:33,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:41:33,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1708840574, now seen corresponding path program 1 times [2023-11-21 19:41:33,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:41:33,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519891233] [2023-11-21 19:41:33,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:33,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:41:33,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:34,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 19:41:34,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:41:34,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519891233] [2023-11-21 19:41:34,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519891233] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:41:34,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599891418] [2023-11-21 19:41:34,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:34,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:41:34,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2d5f4-2e84-440f-947f-02a04a879cdb/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:41:34,237 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2d5f4-2e84-440f-947f-02a04a879cdb/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:41:34,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2d5f4-2e84-440f-947f-02a04a879cdb/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 19:41:34,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:34,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-21 19:41:34,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:41:34,470 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 [2023-11-21 19:41:34,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 19:41:34,511 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:41:34,643 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_create_#t~ret4#1.base_19| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_create_#t~ret4#1.base_19|) 0)) (= (store |c_#valid| |v_ULTIMATE.start_create_#t~ret4#1.base_19| 0) |c_ULTIMATE.start_main_old_#valid#1|))) is different from false [2023-11-21 19:41:34,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599891418] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:41:34,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1137823870] [2023-11-21 19:41:34,650 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-11-21 19:41:34,650 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:41:34,650 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:41:34,650 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:41:34,651 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:41:36,634 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2023-11-21 19:41:36,674 INFO L180 IcfgInterpreter]: Interpretation finished