./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-industry-pattern/array_of_struct_loop_dep.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-industry-pattern/array_of_struct_loop_dep.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5cebeb76ad4442dbfc7818683322baaa88203ae05c49411b79170e1662f915e0 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 19:59:22,761 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 19:59:22,843 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 19:59:22,850 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 19:59:22,851 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 19:59:22,893 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 19:59:22,894 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 19:59:22,894 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 19:59:22,895 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 19:59:22,896 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 19:59:22,897 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 19:59:22,897 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 19:59:22,898 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 19:59:22,898 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 19:59:22,907 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 19:59:22,908 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 19:59:22,908 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 19:59:22,909 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 19:59:22,909 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 19:59:22,910 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 19:59:22,911 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 19:59:22,911 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 19:59:22,912 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 19:59:22,913 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 19:59:22,913 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 19:59:22,914 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 19:59:22,914 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 19:59:22,915 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 19:59:22,915 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 19:59:22,915 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 19:59:22,916 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 19:59:22,916 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 19:59:22,917 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 19:59:22,917 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 19:59:22,917 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 19:59:22,917 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 19:59:22,918 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 19:59:22,918 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:59:22,918 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 19:59:22,918 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 19:59:22,919 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 19:59:22,919 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 19:59:22,919 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 19:59:22,919 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 19:59:22,920 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 19:59:22,920 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 19:59:22,920 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 19:59:22,920 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_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5cebeb76ad4442dbfc7818683322baaa88203ae05c49411b79170e1662f915e0 [2023-12-02 19:59:23,200 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 19:59:23,222 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 19:59:23,225 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 19:59:23,226 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 19:59:23,227 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 19:59:23,228 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/array-industry-pattern/array_of_struct_loop_dep.i [2023-12-02 19:59:26,144 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 19:59:26,363 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 19:59:26,363 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/sv-benchmarks/c/array-industry-pattern/array_of_struct_loop_dep.i [2023-12-02 19:59:26,372 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/data/0ea1778a2/75932a5377ec4c1692e3b6f464dd4838/FLAGb5bee15eb [2023-12-02 19:59:26,387 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/data/0ea1778a2/75932a5377ec4c1692e3b6f464dd4838 [2023-12-02 19:59:26,389 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 19:59:26,391 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 19:59:26,392 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 19:59:26,392 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 19:59:26,398 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 19:59:26,399 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:59:26" (1/1) ... [2023-12-02 19:59:26,400 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f5ba0cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:59:26, skipping insertion in model container [2023-12-02 19:59:26,401 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:59:26" (1/1) ... [2023-12-02 19:59:26,423 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 19:59:26,566 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/sv-benchmarks/c/array-industry-pattern/array_of_struct_loop_dep.i[817,830] [2023-12-02 19:59:26,582 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:59:27,771 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 19:59:27,782 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/sv-benchmarks/c/array-industry-pattern/array_of_struct_loop_dep.i[817,830] [2023-12-02 19:59:27,785 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:59:27,802 INFO L206 MainTranslator]: Completed translation [2023-12-02 19:59:27,802 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:59:27 WrapperNode [2023-12-02 19:59:27,802 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 19:59:27,803 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 19:59:27,803 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 19:59:27,804 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 19:59:27,811 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:59:27" (1/1) ... [2023-12-02 19:59:27,820 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:59:27" (1/1) ... [2023-12-02 19:59:27,841 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 41 [2023-12-02 19:59:27,842 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 19:59:27,843 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 19:59:27,843 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 19:59:27,843 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 19:59:27,856 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:59:27" (1/1) ... [2023-12-02 19:59:27,857 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:59:27" (1/1) ... [2023-12-02 19:59:27,858 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:59:27" (1/1) ... [2023-12-02 19:59:27,859 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:59:27" (1/1) ... [2023-12-02 19:59:27,865 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:59:27" (1/1) ... [2023-12-02 19:59:27,869 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:59:27" (1/1) ... [2023-12-02 19:59:27,871 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:59:27" (1/1) ... [2023-12-02 19:59:27,872 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:59:27" (1/1) ... [2023-12-02 19:59:27,874 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 19:59:27,901 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 19:59:27,902 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 19:59:27,902 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 19:59:27,903 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:59:27" (1/1) ... [2023-12-02 19:59:27,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:59:27,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:59:27,937 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 19:59:27,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 19:59:27,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 19:59:27,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 19:59:27,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 19:59:27,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 19:59:27,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 19:59:27,977 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 19:59:28,053 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 19:59:28,055 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 19:59:28,163 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 19:59:28,206 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 19:59:28,206 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-02 19:59:28,208 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:59:28 BoogieIcfgContainer [2023-12-02 19:59:28,208 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 19:59:28,211 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 19:59:28,211 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 19:59:28,215 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 19:59:28,216 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 07:59:26" (1/3) ... [2023-12-02 19:59:28,217 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a40605b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:59:28, skipping insertion in model container [2023-12-02 19:59:28,217 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:59:27" (2/3) ... [2023-12-02 19:59:28,218 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a40605b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:59:28, skipping insertion in model container [2023-12-02 19:59:28,218 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:59:28" (3/3) ... [2023-12-02 19:59:28,220 INFO L112 eAbstractionObserver]: Analyzing ICFG array_of_struct_loop_dep.i [2023-12-02 19:59:28,240 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 19:59:28,240 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 19:59:28,292 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 19:59:28,299 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@7e939a58, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 19:59:28,299 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 19:59:28,303 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:59:28,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 19:59:28,308 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:59:28,309 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-02 19:59:28,309 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:59:28,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:59:28,314 INFO L85 PathProgramCache]: Analyzing trace with hash 77510321, now seen corresponding path program 1 times [2023-12-02 19:59:28,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:59:28,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919460767] [2023-12-02 19:59:28,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:59:28,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:59:28,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:59:28,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:59:28,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:59:28,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919460767] [2023-12-02 19:59:28,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919460767] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:59:28,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:59:28,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 19:59:28,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127679753] [2023-12-02 19:59:28,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:59:28,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:59:28,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:59:28,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:59:28,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:59:28,541 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:59:28,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:59:28,581 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2023-12-02 19:59:28,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:59:28,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-12-02 19:59:28,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:59:28,593 INFO L225 Difference]: With dead ends: 20 [2023-12-02 19:59:28,593 INFO L226 Difference]: Without dead ends: 13 [2023-12-02 19:59:28,597 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 [2023-12-02 19:59:28,601 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:59:28,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 6 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:59:28,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-12-02 19:59:28,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 8. [2023-12-02 19:59:28,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:59:28,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2023-12-02 19:59:28,635 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2023-12-02 19:59:28,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:59:28,635 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2023-12-02 19:59:28,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:59:28,636 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2023-12-02 19:59:28,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 19:59:28,637 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:59:28,637 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-02 19:59:28,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 19:59:28,638 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:59:28,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:59:28,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1900342786, now seen corresponding path program 1 times [2023-12-02 19:59:28,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:59:28,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538718128] [2023-12-02 19:59:28,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:59:28,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:59:28,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:59:28,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:59:28,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:59:28,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538718128] [2023-12-02 19:59:28,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538718128] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:59:28,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663565687] [2023-12-02 19:59:28,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:59:28,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:59:28,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:59:28,741 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:59:28,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 19:59:28,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:59:28,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 19:59:28,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:59:28,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:59:28,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:59:28,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:59:28,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663565687] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:59:28,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1968784860] [2023-12-02 19:59:28,908 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-12-02 19:59:28,908 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:59:28,912 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:59:28,918 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:59:28,919 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:59:29,222 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:59:29,340 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '87#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| 3) 0)) (= 3 |~#a~0.base|) (= |~#a~0.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (not (= |ULTIMATE.start_main_#t~mem3#1| 10)))' at error location [2023-12-02 19:59:29,341 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:59:29,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:59:29,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-12-02 19:59:29,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037783461] [2023-12-02 19:59:29,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:59:29,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 19:59:29,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:59:29,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 19:59:29,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=60, Unknown=0, NotChecked=0, Total=110 [2023-12-02 19:59:29,344 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:59:29,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:59:29,396 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2023-12-02 19:59:29,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 19:59:29,397 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-12-02 19:59:29,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:59:29,398 INFO L225 Difference]: With dead ends: 32 [2023-12-02 19:59:29,398 INFO L226 Difference]: Without dead ends: 27 [2023-12-02 19:59:29,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=60, Unknown=0, NotChecked=0, Total=110 [2023-12-02 19:59:29,401 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 24 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:59:29,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 12 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:59:29,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-12-02 19:59:29,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 11. [2023-12-02 19:59:29,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:59:29,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2023-12-02 19:59:29,407 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2023-12-02 19:59:29,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:59:29,407 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2023-12-02 19:59:29,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:59:29,408 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2023-12-02 19:59:29,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 19:59:29,408 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:59:29,409 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2023-12-02 19:59:29,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 19:59:29,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:59:29,610 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:59:29,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:59:29,610 INFO L85 PathProgramCache]: Analyzing trace with hash -696147471, now seen corresponding path program 2 times [2023-12-02 19:59:29,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:59:29,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589662719] [2023-12-02 19:59:29,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:59:29,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:59:29,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:59:29,760 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:59:29,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:59:29,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589662719] [2023-12-02 19:59:29,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589662719] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:59:29,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138642194] [2023-12-02 19:59:29,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:59:29,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:59:29,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:59:29,762 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:59:29,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 19:59:29,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 19:59:29,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:59:29,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 19:59:29,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:59:29,845 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:59:29,846 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:59:29,918 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:59:29,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138642194] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:59:29,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [266647541] [2023-12-02 19:59:29,922 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-12-02 19:59:29,922 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:59:29,922 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:59:29,922 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:59:29,923 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:59:30,122 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:59:30,235 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '212#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| 3) 0)) (= 3 |~#a~0.base|) (= |~#a~0.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (not (= |ULTIMATE.start_main_#t~mem3#1| 10)))' at error location [2023-12-02 19:59:30,235 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:59:30,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:59:30,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-12-02 19:59:30,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307777012] [2023-12-02 19:59:30,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:59:30,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 19:59:30,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:59:30,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 19:59:30,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=147, Unknown=0, NotChecked=0, Total=272 [2023-12-02 19:59:30,238 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:59:30,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:59:30,342 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2023-12-02 19:59:30,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 19:59:30,343 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-12-02 19:59:30,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:59:30,344 INFO L225 Difference]: With dead ends: 68 [2023-12-02 19:59:30,344 INFO L226 Difference]: Without dead ends: 63 [2023-12-02 19:59:30,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=147, Unknown=0, NotChecked=0, Total=272 [2023-12-02 19:59:30,346 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 92 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:59:30,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 30 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:59:30,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-12-02 19:59:30,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 17. [2023-12-02 19:59:30,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:59:30,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2023-12-02 19:59:30,354 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 9 [2023-12-02 19:59:30,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:59:30,355 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2023-12-02 19:59:30,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:59:30,355 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2023-12-02 19:59:30,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 19:59:30,356 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:59:30,356 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1] [2023-12-02 19:59:30,363 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 19:59:30,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:59:30,561 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:59:30,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:59:30,561 INFO L85 PathProgramCache]: Analyzing trace with hash 525645521, now seen corresponding path program 3 times [2023-12-02 19:59:30,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:59:30,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067747499] [2023-12-02 19:59:30,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:59:30,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:59:30,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:59:30,838 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:59:30,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:59:30,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067747499] [2023-12-02 19:59:30,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067747499] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:59:30,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320828357] [2023-12-02 19:59:30,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 19:59:30,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:59:30,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:59:30,841 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:59:30,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 19:59:30,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 19:59:30,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:59:30,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 19:59:30,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:59:30,963 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:59:30,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:59:31,225 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:59:31,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320828357] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:59:31,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [795769498] [2023-12-02 19:59:31,228 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-12-02 19:59:31,228 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:59:31,229 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:59:31,229 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:59:31,229 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:59:31,402 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:59:31,529 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '445#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| 3) 0)) (= 3 |~#a~0.base|) (= |~#a~0.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (not (= |ULTIMATE.start_main_#t~mem3#1| 10)))' at error location [2023-12-02 19:59:31,530 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:59:31,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:59:31,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-12-02 19:59:31,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126076524] [2023-12-02 19:59:31,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:59:31,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-02 19:59:31,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:59:31,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-02 19:59:31,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=429, Unknown=0, NotChecked=0, Total=812 [2023-12-02 19:59:31,534 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:59:31,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:59:31,783 INFO L93 Difference]: Finished difference Result 140 states and 153 transitions. [2023-12-02 19:59:31,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 19:59:31,783 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-12-02 19:59:31,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:59:31,786 INFO L225 Difference]: With dead ends: 140 [2023-12-02 19:59:31,786 INFO L226 Difference]: Without dead ends: 135 [2023-12-02 19:59:31,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=383, Invalid=429, Unknown=0, NotChecked=0, Total=812 [2023-12-02 19:59:31,788 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 348 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 19:59:31,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 69 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 19:59:31,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-12-02 19:59:31,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 29. [2023-12-02 19:59:31,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:59:31,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2023-12-02 19:59:31,801 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 15 [2023-12-02 19:59:31,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:59:31,801 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2023-12-02 19:59:31,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:59:31,802 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2023-12-02 19:59:31,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 19:59:31,803 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:59:31,803 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1] [2023-12-02 19:59:31,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 19:59:32,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:59:32,009 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:59:32,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:59:32,009 INFO L85 PathProgramCache]: Analyzing trace with hash 393701521, now seen corresponding path program 4 times [2023-12-02 19:59:32,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:59:32,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007119842] [2023-12-02 19:59:32,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:59:32,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:59:32,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:59:32,765 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:59:32,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:59:32,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007119842] [2023-12-02 19:59:32,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007119842] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:59:32,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105967994] [2023-12-02 19:59:32,766 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 19:59:32,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:59:32,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:59:32,767 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:59:32,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 19:59:32,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:59:32,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 19:59:32,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:59:32,927 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:59:32,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:59:33,815 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:59:33,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105967994] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:59:33,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2068762566] [2023-12-02 19:59:33,817 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-12-02 19:59:33,817 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:59:33,817 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:59:33,817 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:59:33,817 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:59:33,917 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:59:34,022 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '894#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| 3) 0)) (= 3 |~#a~0.base|) (= |~#a~0.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (not (= |ULTIMATE.start_main_#t~mem3#1| 10)))' at error location [2023-12-02 19:59:34,023 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:59:34,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:59:34,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2023-12-02 19:59:34,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365580823] [2023-12-02 19:59:34,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:59:34,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-12-02 19:59:34,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:59:34,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-12-02 19:59:34,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1425, Unknown=0, NotChecked=0, Total=2756 [2023-12-02 19:59:34,028 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:59:34,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:59:34,569 INFO L93 Difference]: Finished difference Result 284 states and 309 transitions. [2023-12-02 19:59:34,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-12-02 19:59:34,569 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-12-02 19:59:34,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:59:34,572 INFO L225 Difference]: With dead ends: 284 [2023-12-02 19:59:34,572 INFO L226 Difference]: Without dead ends: 279 [2023-12-02 19:59:34,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1331, Invalid=1425, Unknown=0, NotChecked=0, Total=2756 [2023-12-02 19:59:34,576 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 564 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 19:59:34,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 138 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 19:59:34,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2023-12-02 19:59:34,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 53. [2023-12-02 19:59:34,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:59:34,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2023-12-02 19:59:34,591 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 27 [2023-12-02 19:59:34,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:59:34,591 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2023-12-02 19:59:34,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:59:34,592 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2023-12-02 19:59:34,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-12-02 19:59:34,594 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:59:34,594 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1] [2023-12-02 19:59:34,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-02 19:59:34,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:59:34,796 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:59:34,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:59:34,796 INFO L85 PathProgramCache]: Analyzing trace with hash 569830417, now seen corresponding path program 5 times [2023-12-02 19:59:34,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:59:34,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462174999] [2023-12-02 19:59:34,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:59:34,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:59:34,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:59:36,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:59:36,721 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:59:36,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462174999] [2023-12-02 19:59:36,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462174999] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:59:36,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961530181] [2023-12-02 19:59:36,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:59:36,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:59:36,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:59:36,723 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:59:36,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 20:00:38,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2023-12-02 20:00:38,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 20:00:38,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 48 conjunts are in the unsatisfiable core [2023-12-02 20:00:38,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:00:38,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:00:38,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:00:41,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:00:41,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961530181] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:00:41,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [268881796] [2023-12-02 20:00:41,541 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-12-02 20:00:41,541 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:00:41,541 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:00:41,541 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:00:41,542 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:00:41,611 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:00:41,703 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1775#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| 3) 0)) (= 3 |~#a~0.base|) (= |~#a~0.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (not (= |ULTIMATE.start_main_#t~mem3#1| 10)))' at error location [2023-12-02 20:00:41,703 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:00:41,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:00:41,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2023-12-02 20:00:41,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40803666] [2023-12-02 20:00:41,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:00:41,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-12-02 20:00:41,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:00:41,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-12-02 20:00:41,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4955, Invalid=5145, Unknown=0, NotChecked=0, Total=10100 [2023-12-02 20:00:41,711 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 96 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:00:43,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:00:43,986 INFO L93 Difference]: Finished difference Result 572 states and 621 transitions. [2023-12-02 20:00:43,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-12-02 20:00:43,987 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 96 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-12-02 20:00:43,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:00:43,991 INFO L225 Difference]: With dead ends: 572 [2023-12-02 20:00:43,992 INFO L226 Difference]: Without dead ends: 567 [2023-12-02 20:00:43,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4955, Invalid=5145, Unknown=0, NotChecked=0, Total=10100 [2023-12-02 20:00:43,996 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1756 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 441 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1756 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 441 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 20:00:43,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1756 Valid, 285 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [441 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 20:00:43,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2023-12-02 20:00:44,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 101. [2023-12-02 20:00:44,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:00:44,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2023-12-02 20:00:44,011 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 51 [2023-12-02 20:00:44,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:00:44,011 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2023-12-02 20:00:44,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 96 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:00:44,012 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2023-12-02 20:00:44,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-12-02 20:00:44,015 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:00:44,015 INFO L195 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1] [2023-12-02 20:00:44,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 20:00:44,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:00:44,216 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:00:44,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:00:44,217 INFO L85 PathProgramCache]: Analyzing trace with hash -836865263, now seen corresponding path program 6 times [2023-12-02 20:00:44,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:00:44,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583419778] [2023-12-02 20:00:44,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:00:44,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:00:44,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:00:49,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:00:49,690 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:00:49,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583419778] [2023-12-02 20:00:49,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583419778] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:00:49,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013942019] [2023-12-02 20:00:49,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 20:00:49,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:00:49,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:00:49,691 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:00:49,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 20:00:49,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 20:00:49,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 20:00:49,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 96 conjunts are in the unsatisfiable core [2023-12-02 20:00:49,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:00:50,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:00:50,069 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:00:59,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:00:59,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013942019] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:00:59,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [486658652] [2023-12-02 20:00:59,200 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-12-02 20:00:59,200 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:00:59,201 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:00:59,201 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:00:59,201 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:00:59,264 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:00:59,405 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3520#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| 3) 0)) (= 3 |~#a~0.base|) (= |~#a~0.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (not (= |ULTIMATE.start_main_#t~mem3#1| 10)))' at error location [2023-12-02 20:00:59,405 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:00:59,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:00:59,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 192 [2023-12-02 20:00:59,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145844697] [2023-12-02 20:00:59,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:00:59,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2023-12-02 20:00:59,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:00:59,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2023-12-02 20:00:59,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19115, Invalid=19497, Unknown=0, NotChecked=0, Total=38612 [2023-12-02 20:00:59,424 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 193 states, 193 states have (on average 1.0207253886010363) internal successors, (197), 192 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:01:19,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:01:19,079 INFO L93 Difference]: Finished difference Result 1148 states and 1245 transitions. [2023-12-02 20:01:19,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2023-12-02 20:01:19,080 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 1.0207253886010363) internal successors, (197), 192 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2023-12-02 20:01:19,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:01:19,088 INFO L225 Difference]: With dead ends: 1148 [2023-12-02 20:01:19,088 INFO L226 Difference]: Without dead ends: 1143 [2023-12-02 20:01:19,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=19115, Invalid=19497, Unknown=0, NotChecked=0, Total=38612 [2023-12-02 20:01:19,093 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3064 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 768 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3064 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 1342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 768 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-02 20:01:19,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3064 Valid, 570 Invalid, 1342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [768 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-02 20:01:19,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2023-12-02 20:01:19,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 197. [2023-12-02 20:01:19,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.010204081632653) internal successors, (198), 196 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:01:19,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2023-12-02 20:01:19,118 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 99 [2023-12-02 20:01:19,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:01:19,118 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2023-12-02 20:01:19,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 1.0207253886010363) internal successors, (197), 192 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:01:19,119 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2023-12-02 20:01:19,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2023-12-02 20:01:19,124 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:01:19,124 INFO L195 NwaCegarLoop]: trace histogram [190, 1, 1, 1, 1, 1] [2023-12-02 20:01:19,130 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 20:01:19,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:01:19,325 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:01:19,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:01:19,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1257275119, now seen corresponding path program 7 times [2023-12-02 20:01:19,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:01:19,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083195321] [2023-12-02 20:01:19,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:01:19,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:01:19,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:01:38,545 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:01:38,545 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:01:38,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083195321] [2023-12-02 20:01:38,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083195321] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:01:38,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686304705] [2023-12-02 20:01:38,545 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 20:01:38,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:01:38,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:01:38,546 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:01:38,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 20:01:38,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:01:38,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 1372 conjuncts, 192 conjunts are in the unsatisfiable core [2023-12-02 20:01:38,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:01:39,236 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:01:39,236 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:02:16,855 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:02:16,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686304705] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:02:16,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1191905833] [2023-12-02 20:02:16,857 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-12-02 20:02:16,857 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:02:16,858 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:02:16,858 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:02:16,858 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:02:16,920 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:02:17,149 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6993#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| 3) 0)) (= 3 |~#a~0.base|) (= |~#a~0.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (not (= |ULTIMATE.start_main_#t~mem3#1| 10)))' at error location [2023-12-02 20:02:17,149 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:02:17,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:02:17,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 384 [2023-12-02 20:02:17,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319123632] [2023-12-02 20:02:17,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:02:17,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2023-12-02 20:02:17,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:02:17,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2023-12-02 20:02:17,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75083, Invalid=75849, Unknown=0, NotChecked=0, Total=150932 [2023-12-02 20:02:17,175 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand has 385 states, 385 states have (on average 1.0103896103896104) internal successors, (389), 384 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:07:06,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:07:06,004 INFO L93 Difference]: Finished difference Result 2300 states and 2493 transitions. [2023-12-02 20:07:06,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2023-12-02 20:07:06,005 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 1.0103896103896104) internal successors, (389), 384 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2023-12-02 20:07:06,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:07:06,020 INFO L225 Difference]: With dead ends: 2300 [2023-12-02 20:07:06,020 INFO L226 Difference]: Without dead ends: 2295 [2023-12-02 20:07:06,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 775 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 387 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3626 ImplicationChecksByTransitivity, 50.2s TimeCoverageRelationStatistics Valid=75083, Invalid=75849, Unknown=0, NotChecked=0, Total=150932 [2023-12-02 20:07:06,038 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 8664 mSDsluCounter, 1143 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 2168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8664 SdHoareTripleChecker+Valid, 1146 SdHoareTripleChecker+Invalid, 3318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2168 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-12-02 20:07:06,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8664 Valid, 1146 Invalid, 3318 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2168 Valid, 1150 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-12-02 20:07:06,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2295 states. [2023-12-02 20:07:06,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2295 to 389. [2023-12-02 20:07:06,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 1.0051546391752577) internal successors, (390), 388 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:07:06,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 390 transitions. [2023-12-02 20:07:06,077 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 390 transitions. Word has length 195 [2023-12-02 20:07:06,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:07:06,078 INFO L495 AbstractCegarLoop]: Abstraction has 389 states and 390 transitions. [2023-12-02 20:07:06,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 1.0103896103896104) internal successors, (389), 384 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:07:06,079 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 390 transitions. [2023-12-02 20:07:06,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2023-12-02 20:07:06,088 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:07:06,088 INFO L195 NwaCegarLoop]: trace histogram [382, 1, 1, 1, 1, 1] [2023-12-02 20:07:06,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 20:07:06,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:07:06,289 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:07:06,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:07:06,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1299815697, now seen corresponding path program 8 times [2023-12-02 20:07:06,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:07:06,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870647239] [2023-12-02 20:07:06,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:07:06,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:07:07,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:08:26,176 INFO L134 CoverageAnalysis]: Checked inductivity of 73153 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:08:26,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:08:26,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870647239] [2023-12-02 20:08:26,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870647239] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:08:26,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259044184] [2023-12-02 20:08:26,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 20:08:26,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:08:26,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:08:26,178 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:08:26,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14faaa01-445d-4150-b2fe-adbc42dc1c58/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process