./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_3358e496-11b7-426a-9186-9a5c51b3c5f7/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3358e496-11b7-426a-9186-9a5c51b3c5f7/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3358e496-11b7-426a-9186-9a5c51b3c5f7/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3358e496-11b7-426a-9186-9a5c51b3c5f7/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3358e496-11b7-426a-9186-9a5c51b3c5f7/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3358e496-11b7-426a-9186-9a5c51b3c5f7/bin/utaipan-verify-t7M7D8N6sZ --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 503a3e49b44041609ec1bba765b53912c88abb90ff278e61e68e863904faf4bb --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:15:08,489 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:15:08,609 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3358e496-11b7-426a-9186-9a5c51b3c5f7/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:15:08,614 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:15:08,615 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:15:08,654 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:15:08,655 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:15:08,656 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:15:08,657 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:15:08,664 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:15:08,665 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:15:08,665 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:15:08,666 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:15:08,668 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:15:08,668 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:15:08,669 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:15:08,669 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:15:08,670 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:15:08,670 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:15:08,671 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:15:08,671 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:15:08,672 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:15:08,673 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:15:08,674 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:15:08,674 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:15:08,675 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:15:08,675 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:15:08,676 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:15:08,676 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:15:08,677 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:15:08,678 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:15:08,679 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:15:08,679 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:15:08,679 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:15:08,679 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:15:08,680 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:15:08,680 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:15:08,680 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:15:08,681 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:15:08,681 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:15:08,681 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:15:08,682 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:15:08,682 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:15:08,683 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:15:08,683 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:15:08,684 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_3358e496-11b7-426a-9186-9a5c51b3c5f7/bin/utaipan-verify-t7M7D8N6sZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3358e496-11b7-426a-9186-9a5c51b3c5f7/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 503a3e49b44041609ec1bba765b53912c88abb90ff278e61e68e863904faf4bb [2023-11-19 04:15:09,039 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:15:09,086 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:15:09,089 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:15:09,090 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:15:09,091 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:15:09,093 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3358e496-11b7-426a-9186-9a5c51b3c5f7/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i [2023-11-19 04:15:12,186 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:15:12,486 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:15:12,486 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3358e496-11b7-426a-9186-9a5c51b3c5f7/sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i [2023-11-19 04:15:12,504 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3358e496-11b7-426a-9186-9a5c51b3c5f7/bin/utaipan-verify-t7M7D8N6sZ/data/1330d5044/07ad1b4cde43431b9cdf6363ac5fbc04/FLAG815e54f3b [2023-11-19 04:15:12,518 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3358e496-11b7-426a-9186-9a5c51b3c5f7/bin/utaipan-verify-t7M7D8N6sZ/data/1330d5044/07ad1b4cde43431b9cdf6363ac5fbc04 [2023-11-19 04:15:12,521 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:15:12,523 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:15:12,524 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:15:12,524 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:15:12,530 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:15:12,531 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:15:12" (1/1) ... [2023-11-19 04:15:12,533 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ae8cdbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:12, skipping insertion in model container [2023-11-19 04:15:12,533 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:15:12" (1/1) ... [2023-11-19 04:15:12,581 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:15:12,986 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_3358e496-11b7-426a-9186-9a5c51b3c5f7/sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i[22534,22547] [2023-11-19 04:15:12,991 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_3358e496-11b7-426a-9186-9a5c51b3c5f7/sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i[22606,22619] [2023-11-19 04:15:12,992 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_3358e496-11b7-426a-9186-9a5c51b3c5f7/sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i[22746,22759] [2023-11-19 04:15:12,993 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_3358e496-11b7-426a-9186-9a5c51b3c5f7/sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i[22820,22833] [2023-11-19 04:15:13,003 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:15:13,018 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:15:13,065 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_3358e496-11b7-426a-9186-9a5c51b3c5f7/sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i[22534,22547] [2023-11-19 04:15:13,067 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_3358e496-11b7-426a-9186-9a5c51b3c5f7/sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i[22606,22619] [2023-11-19 04:15:13,069 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_3358e496-11b7-426a-9186-9a5c51b3c5f7/sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i[22746,22759] [2023-11-19 04:15:13,070 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_3358e496-11b7-426a-9186-9a5c51b3c5f7/sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i[22820,22833] [2023-11-19 04:15:13,073 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:15:13,105 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:15:13,105 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:13 WrapperNode [2023-11-19 04:15:13,106 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:15:13,107 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:15:13,107 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:15:13,107 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:15:13,116 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:13" (1/1) ... [2023-11-19 04:15:13,149 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:13" (1/1) ... [2023-11-19 04:15:13,206 INFO L138 Inliner]: procedures = 119, calls = 36, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 123 [2023-11-19 04:15:13,207 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:15:13,208 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:15:13,208 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:15:13,208 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:15:13,223 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:13" (1/1) ... [2023-11-19 04:15:13,223 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:13" (1/1) ... [2023-11-19 04:15:13,227 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:13" (1/1) ... [2023-11-19 04:15:13,227 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:13" (1/1) ... [2023-11-19 04:15:13,235 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:13" (1/1) ... [2023-11-19 04:15:13,250 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:13" (1/1) ... [2023-11-19 04:15:13,252 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:13" (1/1) ... [2023-11-19 04:15:13,254 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:13" (1/1) ... [2023-11-19 04:15:13,257 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:15:13,258 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:15:13,258 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:15:13,259 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:15:13,260 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:13" (1/1) ... [2023-11-19 04:15:13,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:15:13,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3358e496-11b7-426a-9186-9a5c51b3c5f7/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:15:13,310 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3358e496-11b7-426a-9186-9a5c51b3c5f7/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:15:13,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3358e496-11b7-426a-9186-9a5c51b3c5f7/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:15:13,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 04:15:13,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 04:15:13,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 04:15:13,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:15:13,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 04:15:13,355 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 04:15:13,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 04:15:13,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:15:13,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:15:13,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:15:13,495 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:15:13,498 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:15:13,778 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:15:13,878 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:15:13,879 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-19 04:15:13,884 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:15:13 BoogieIcfgContainer [2023-11-19 04:15:13,884 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:15:13,887 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:15:13,888 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:15:13,891 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:15:13,892 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:15:12" (1/3) ... [2023-11-19 04:15:13,893 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4655ebf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:15:13, skipping insertion in model container [2023-11-19 04:15:13,893 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:13" (2/3) ... [2023-11-19 04:15:13,893 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4655ebf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:15:13, skipping insertion in model container [2023-11-19 04:15:13,894 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:15:13" (3/3) ... [2023-11-19 04:15:13,895 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-rb-sentinel-2.i [2023-11-19 04:15:13,917 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:15:13,918 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-11-19 04:15:13,970 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:15:13,977 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;@22026a8a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:15:13,978 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-19 04:15:13,982 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:15:13,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-19 04:15:13,989 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:15:13,990 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 04:15:13,991 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 04:15:13,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:15:13,997 INFO L85 PathProgramCache]: Analyzing trace with hash 153922345, now seen corresponding path program 1 times [2023-11-19 04:15:14,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:15:14,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875325238] [2023-11-19 04:15:14,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:15:14,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:15:14,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:15:14,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:15:14,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:15:14,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875325238] [2023-11-19 04:15:14,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875325238] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:15:14,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:15:14,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:15:14,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385149469] [2023-11-19 04:15:14,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:15:14,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 04:15:14,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:15:14,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 04:15:14,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 04:15:14,369 INFO L87 Difference]: Start difference. First operand has 27 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:15:14,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:15:14,439 INFO L93 Difference]: Finished difference Result 51 states and 81 transitions. [2023-11-19 04:15:14,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 04:15:14,442 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-19 04:15:14,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:15:14,450 INFO L225 Difference]: With dead ends: 51 [2023-11-19 04:15:14,451 INFO L226 Difference]: Without dead ends: 25 [2023-11-19 04:15:14,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 04:15:14,459 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:15:14,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:15:14,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-19 04:15:14,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-11-19 04:15:14,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 24 states have internal predecessors, (27), 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) [2023-11-19 04:15:14,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2023-11-19 04:15:14,498 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 5 [2023-11-19 04:15:14,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:15:14,499 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2023-11-19 04:15:14,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:15:14,500 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2023-11-19 04:15:14,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-19 04:15:14,500 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:15:14,500 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 04:15:14,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:15:14,503 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 04:15:14,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:15:14,504 INFO L85 PathProgramCache]: Analyzing trace with hash 464256366, now seen corresponding path program 1 times [2023-11-19 04:15:14,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:15:14,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105727727] [2023-11-19 04:15:14,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:15:14,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:15:14,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:15:14,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:15:14,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:15:14,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105727727] [2023-11-19 04:15:14,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105727727] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:15:14,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:15:14,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:15:14,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554529740] [2023-11-19 04:15:14,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:15:14,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:15:14,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:15:14,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:15:14,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:15:14,828 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:15:14,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:15:14,966 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2023-11-19 04:15:14,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:15:14,968 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-19 04:15:14,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:15:14,969 INFO L225 Difference]: With dead ends: 31 [2023-11-19 04:15:14,969 INFO L226 Difference]: Without dead ends: 29 [2023-11-19 04:15:14,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:15:14,971 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 39 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:15:14,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 24 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:15:14,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-19 04:15:14,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 23. [2023-11-19 04:15:14,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 20 states have (on average 1.25) internal successors, (25), 22 states have internal predecessors, (25), 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) [2023-11-19 04:15:14,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2023-11-19 04:15:14,983 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 6 [2023-11-19 04:15:14,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:15:14,984 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2023-11-19 04:15:14,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:15:14,984 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2023-11-19 04:15:14,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-19 04:15:14,985 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:15:14,985 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:15:14,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:15:14,986 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 04:15:14,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:15:14,987 INFO L85 PathProgramCache]: Analyzing trace with hash 870651803, now seen corresponding path program 1 times [2023-11-19 04:15:14,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:15:14,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424054081] [2023-11-19 04:15:14,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:15:14,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:15:15,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:15:15,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:15:15,216 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:15:15,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424054081] [2023-11-19 04:15:15,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424054081] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:15:15,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:15:15,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:15:15,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498917697] [2023-11-19 04:15:15,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:15:15,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:15:15,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:15:15,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:15:15,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:15:15,219 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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) [2023-11-19 04:15:15,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:15:15,431 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2023-11-19 04:15:15,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 04:15:15,432 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-19 04:15:15,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:15:15,433 INFO L225 Difference]: With dead ends: 48 [2023-11-19 04:15:15,433 INFO L226 Difference]: Without dead ends: 46 [2023-11-19 04:15:15,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:15:15,435 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 32 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:15:15,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 61 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:15:15,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-19 04:15:15,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 30. [2023-11-19 04:15:15,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:15:15,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2023-11-19 04:15:15,445 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 9 [2023-11-19 04:15:15,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:15:15,446 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2023-11-19 04:15:15,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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) [2023-11-19 04:15:15,446 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2023-11-19 04:15:15,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-19 04:15:15,447 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:15:15,447 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:15:15,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:15:15,448 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 04:15:15,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:15:15,448 INFO L85 PathProgramCache]: Analyzing trace with hash 917959806, now seen corresponding path program 1 times [2023-11-19 04:15:15,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:15:15,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527797972] [2023-11-19 04:15:15,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:15:15,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:15:15,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:15:16,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:15:16,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:15:16,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527797972] [2023-11-19 04:15:16,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527797972] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:15:16,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063074169] [2023-11-19 04:15:16,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:15:16,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:15:16,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3358e496-11b7-426a-9186-9a5c51b3c5f7/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:15:16,408 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3358e496-11b7-426a-9186-9a5c51b3c5f7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:15:16,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3358e496-11b7-426a-9186-9a5c51b3c5f7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:15:16,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:15:16,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-19 04:15:16,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:15:16,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-19 04:15:16,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-19 04:15:16,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:15:16,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-19 04:15:16,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:15:16,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 185 treesize of output 179 [2023-11-19 04:15:17,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:15:17,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 183 [2023-11-19 04:15:17,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:15:17,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 157 treesize of output 177 [2023-11-19 04:15:17,227 INFO L349 Elim1Store]: treesize reduction 86, result has 26.5 percent of original size [2023-11-19 04:15:17,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 155 treesize of output 193 [2023-11-19 04:15:17,299 INFO L349 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-11-19 04:15:17,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 154 [2023-11-19 04:15:17,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 143 [2023-11-19 04:15:17,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-11-19 04:15:17,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-19 04:15:17,545 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:15:17,550 INFO L349 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-11-19 04:15:17,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 7 [2023-11-19 04:15:17,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2023-11-19 04:15:17,630 INFO L349 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2023-11-19 04:15:17,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 26 [2023-11-19 04:15:17,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-19 04:15:17,771 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-19 04:15:17,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 99 treesize of output 123 [2023-11-19 04:15:17,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:15:17,893 INFO L349 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2023-11-19 04:15:17,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 155 treesize of output 149 [2023-11-19 04:15:18,047 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-19 04:15:18,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 97 [2023-11-19 04:15:18,136 INFO L349 Elim1Store]: treesize reduction 36, result has 18.2 percent of original size [2023-11-19 04:15:18,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 86 treesize of output 68 [2023-11-19 04:15:18,155 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 04:15:18,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 68 [2023-11-19 04:15:18,571 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 04:15:18,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 51 [2023-11-19 04:15:18,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:15:18,580 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:15:18,814 INFO L349 Elim1Store]: treesize reduction 20, result has 63.6 percent of original size [2023-11-19 04:15:18,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 198 treesize of output 235 [2023-11-19 04:15:18,884 INFO L349 Elim1Store]: treesize reduction 10, result has 70.6 percent of original size [2023-11-19 04:15:18,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 186 treesize of output 215 [2023-11-19 04:15:18,985 INFO L349 Elim1Store]: treesize reduction 20, result has 63.6 percent of original size [2023-11-19 04:15:18,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 177 treesize of output 214 [2023-11-19 04:15:19,124 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 04:15:19,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2023-11-19 04:15:19,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2023-11-19 04:15:19,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2023-11-19 04:15:19,270 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-19 04:15:19,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 11 [2023-11-19 04:15:19,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:15:19,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063074169] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:15:19,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1711614776] [2023-11-19 04:15:19,450 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-19 04:15:19,451 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:15:19,454 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:15:19,460 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:15:19,460 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:15:24,422 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:15:29,313 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '382#(and (<= 1 |#StackHeapBarrier|) (not (= |ULTIMATE.start_main_~null~0#1.base| |ULTIMATE.start_main_~end~0#1.base|)) (= |ULTIMATE.start_main_~null~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~end~0#1.base|) 4) 1)) (= |ULTIMATE.start_main_~end~0#1.offset| 0) (= |ULTIMATE.start_main_~end~0#1.base| |ULTIMATE.start_main_~list~0#1.base|) (= |ULTIMATE.start_main_~list~0#1.offset| 0))' at error location [2023-11-19 04:15:29,314 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:15:29,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:15:29,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2023-11-19 04:15:29,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65481849] [2023-11-19 04:15:29,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:15:29,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 04:15:29,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:15:29,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 04:15:29,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=280, Unknown=1, NotChecked=0, Total=342 [2023-11-19 04:15:29,317 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 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) [2023-11-19 04:15:31,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-19 04:15:33,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-19 04:15:33,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:15:33,530 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2023-11-19 04:15:33,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 04:15:33,531 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-19 04:15:33,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:15:33,532 INFO L225 Difference]: With dead ends: 37 [2023-11-19 04:15:33,532 INFO L226 Difference]: Without dead ends: 35 [2023-11-19 04:15:33,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=118, Invalid=433, Unknown=1, NotChecked=0, Total=552 [2023-11-19 04:15:33,534 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 115 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 10 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:15:33,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 49 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 48 Invalid, 3 Unknown, 0 Unchecked, 4.0s Time] [2023-11-19 04:15:33,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-19 04:15:33,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 21. [2023-11-19 04:15:33,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 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) [2023-11-19 04:15:33,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2023-11-19 04:15:33,542 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 11 [2023-11-19 04:15:33,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:15:33,542 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2023-11-19 04:15:33,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 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) [2023-11-19 04:15:33,543 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2023-11-19 04:15:33,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-19 04:15:33,543 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:15:33,543 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:15:33,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3358e496-11b7-426a-9186-9a5c51b3c5f7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 04:15:33,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3358e496-11b7-426a-9186-9a5c51b3c5f7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:15:33,760 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 04:15:33,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:15:33,760 INFO L85 PathProgramCache]: Analyzing trace with hash 224323074, now seen corresponding path program 1 times [2023-11-19 04:15:33,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:15:33,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873537408] [2023-11-19 04:15:33,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:15:33,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:15:33,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:15:33,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:15:33,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:15:33,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873537408] [2023-11-19 04:15:33,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873537408] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:15:33,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:15:33,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 04:15:33,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223249871] [2023-11-19 04:15:33,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:15:33,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:15:33,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:15:33,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:15:33,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:15:33,838 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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) [2023-11-19 04:15:33,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:15:33,969 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2023-11-19 04:15:33,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:15:33,969 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-19 04:15:33,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:15:33,970 INFO L225 Difference]: With dead ends: 36 [2023-11-19 04:15:33,970 INFO L226 Difference]: Without dead ends: 24 [2023-11-19 04:15:33,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:15:33,971 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 4 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:15:33,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 51 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:15:33,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-19 04:15:33,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2023-11-19 04:15:33,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 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) [2023-11-19 04:15:33,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2023-11-19 04:15:33,979 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 13 [2023-11-19 04:15:33,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:15:33,979 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2023-11-19 04:15:33,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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) [2023-11-19 04:15:33,979 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2023-11-19 04:15:33,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-19 04:15:33,980 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:15:33,980 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:15:33,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 04:15:33,981 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 04:15:33,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:15:33,981 INFO L85 PathProgramCache]: Analyzing trace with hash 958663210, now seen corresponding path program 1 times [2023-11-19 04:15:33,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:15:33,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835788739] [2023-11-19 04:15:33,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:15:33,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:15:33,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:15:34,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:15:34,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:15:34,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835788739] [2023-11-19 04:15:34,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835788739] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:15:34,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283687067] [2023-11-19 04:15:34,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:15:34,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:15:34,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3358e496-11b7-426a-9186-9a5c51b3c5f7/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:15:34,187 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3358e496-11b7-426a-9186-9a5c51b3c5f7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:15:34,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3358e496-11b7-426a-9186-9a5c51b3c5f7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:15:34,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:15:34,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-19 04:15:34,291 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:15:34,336 INFO L349 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2023-11-19 04:15:34,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 78 [2023-11-19 04:15:34,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2023-11-19 04:15:34,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:15:34,381 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:15:34,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-19 04:15:34,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 19 [2023-11-19 04:15:34,544 INFO L349 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2023-11-19 04:15:34,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 78 [2023-11-19 04:15:34,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2023-11-19 04:15:34,596 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:15:34,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-19 04:15:34,656 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:15:34,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 15 [2023-11-19 04:15:34,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-19 04:15:35,466 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 04:15:35,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 54 [2023-11-19 04:15:35,487 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 04:15:35,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 61 [2023-11-19 04:15:35,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-19 04:15:35,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:15:35,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-19 04:15:35,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2023-11-19 04:15:35,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:15:35,583 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:15:35,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:15:35,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283687067] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:15:35,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [971660873] [2023-11-19 04:15:35,737 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-19 04:15:35,738 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:15:35,738 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:15:35,738 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:15:35,738 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:15:36,403 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:16:07,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [971660873] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:16:07,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:16:07,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 4, 4] total 14 [2023-11-19 04:16:07,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102945533] [2023-11-19 04:16:07,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:16:07,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 04:16:07,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:16:07,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 04:16:07,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=142, Unknown=9, NotChecked=0, Total=210 [2023-11-19 04:16:07,654 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 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) [2023-11-19 04:16:10,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-19 04:16:10,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:16:10,792 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2023-11-19 04:16:10,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 04:16:10,793 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-19 04:16:10,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:16:10,794 INFO L225 Difference]: With dead ends: 48 [2023-11-19 04:16:10,794 INFO L226 Difference]: Without dead ends: 25 [2023-11-19 04:16:10,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 31.5s TimeCoverageRelationStatistics Valid=59, Invalid=142, Unknown=9, NotChecked=0, Total=210 [2023-11-19 04:16:10,795 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:16:10,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 51 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2023-11-19 04:16:10,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-19 04:16:10,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-11-19 04:16:10,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 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) [2023-11-19 04:16:10,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2023-11-19 04:16:10,803 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 16 [2023-11-19 04:16:10,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:16:10,804 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2023-11-19 04:16:10,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 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) [2023-11-19 04:16:10,804 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2023-11-19 04:16:10,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-19 04:16:10,805 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:16:10,805 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:16:10,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3358e496-11b7-426a-9186-9a5c51b3c5f7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-19 04:16:11,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3358e496-11b7-426a-9186-9a5c51b3c5f7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 04:16:11,009 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 04:16:11,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:16:11,009 INFO L85 PathProgramCache]: Analyzing trace with hash 946698215, now seen corresponding path program 1 times [2023-11-19 04:16:11,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:16:11,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414876439] [2023-11-19 04:16:11,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:16:11,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:16:11,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:16:12,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:16:12,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:16:12,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414876439] [2023-11-19 04:16:12,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414876439] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:16:12,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61691956] [2023-11-19 04:16:12,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:16:12,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:16:12,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3358e496-11b7-426a-9186-9a5c51b3c5f7/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:16:12,465 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3358e496-11b7-426a-9186-9a5c51b3c5f7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:16:12,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3358e496-11b7-426a-9186-9a5c51b3c5f7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 04:16:12,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:16:12,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-19 04:16:12,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:16:12,629 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-19 04:16:12,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2023-11-19 04:16:12,817 INFO L349 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-11-19 04:16:12,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 231 treesize of output 255 [2023-11-19 04:16:12,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 222 treesize of output 214 [2023-11-19 04:16:12,901 INFO L349 Elim1Store]: treesize reduction 34, result has 12.8 percent of original size [2023-11-19 04:16:12,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 336 treesize of output 308 [2023-11-19 04:16:13,228 INFO L349 Elim1Store]: treesize reduction 199, result has 24.3 percent of original size [2023-11-19 04:16:13,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 289 treesize of output 358 [2023-11-19 04:16:13,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 262 [2023-11-19 04:16:13,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 224 treesize of output 234 [2023-11-19 04:16:13,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2023-11-19 04:16:13,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-19 04:16:13,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 24 [2023-11-19 04:16:13,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-11-19 04:16:13,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-19 04:16:13,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 5 [2023-11-19 04:16:13,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2023-11-19 04:16:13,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2023-11-19 04:16:13,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:16:13,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-19 04:16:13,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 120 [2023-11-19 04:16:13,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 21 [2023-11-19 04:16:14,201 INFO L349 Elim1Store]: treesize reduction 74, result has 6.3 percent of original size [2023-11-19 04:16:14,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 123 treesize of output 102