./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext2-properties/simple_search_value-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebfc244e-65a9-4813-8d26-648fedf15e51/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebfc244e-65a9-4813-8d26-648fedf15e51/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebfc244e-65a9-4813-8d26-648fedf15e51/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebfc244e-65a9-4813-8d26-648fedf15e51/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-ext2-properties/simple_search_value-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebfc244e-65a9-4813-8d26-648fedf15e51/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebfc244e-65a9-4813-8d26-648fedf15e51/bin/utaipan-verify-DbMuA5NWw2 --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 a622ae6de889131f2da5147d62f9f380917f72e1547f77059c8208bcfb6e8bd0 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:34:18,342 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:34:18,430 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebfc244e-65a9-4813-8d26-648fedf15e51/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 12:34:18,436 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:34:18,437 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:34:18,466 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:34:18,466 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:34:18,467 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:34:18,468 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:34:18,468 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:34:18,469 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:34:18,469 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:34:18,470 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:34:18,471 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:34:18,471 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:34:18,472 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:34:18,472 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:34:18,473 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:34:18,473 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:34:18,477 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:34:18,477 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:34:18,478 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:34:18,479 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:34:18,479 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:34:18,480 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:34:18,480 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:34:18,480 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:34:18,481 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:34:18,484 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:34:18,484 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:34:18,485 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:34:18,485 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:34:18,486 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:34:18,486 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:34:18,486 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:34:18,487 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:34:18,487 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:34:18,488 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:34:18,488 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:34:18,489 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:34:18,489 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:34:18,490 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:34:18,490 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:34:18,490 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:34:18,491 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:34:18,491 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:34:18,491 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:34:18,491 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_ebfc244e-65a9-4813-8d26-648fedf15e51/bin/utaipan-verify-DbMuA5NWw2/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebfc244e-65a9-4813-8d26-648fedf15e51/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a622ae6de889131f2da5147d62f9f380917f72e1547f77059c8208bcfb6e8bd0 [2024-11-02 12:34:18,835 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:34:18,871 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:34:18,875 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:34:18,877 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:34:18,878 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:34:18,880 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebfc244e-65a9-4813-8d26-648fedf15e51/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/list-ext2-properties/simple_search_value-2.i Unable to find full path for "g++" [2024-11-02 12:34:21,111 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:34:21,385 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:34:21,386 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebfc244e-65a9-4813-8d26-648fedf15e51/sv-benchmarks/c/list-ext2-properties/simple_search_value-2.i [2024-11-02 12:34:21,407 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebfc244e-65a9-4813-8d26-648fedf15e51/bin/utaipan-verify-DbMuA5NWw2/data/3df0bd25c/56126f00a48c425ebf2c736a2c38d054/FLAG7cbd59d7e [2024-11-02 12:34:21,442 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebfc244e-65a9-4813-8d26-648fedf15e51/bin/utaipan-verify-DbMuA5NWw2/data/3df0bd25c/56126f00a48c425ebf2c736a2c38d054 [2024-11-02 12:34:21,445 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:34:21,446 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:34:21,448 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:34:21,448 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:34:21,456 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:34:21,457 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:34:21" (1/1) ... [2024-11-02 12:34:21,461 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67c81ab9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:34:21, skipping insertion in model container [2024-11-02 12:34:21,462 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:34:21" (1/1) ... [2024-11-02 12:34:21,516 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:34:22,083 WARN L251 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_ebfc244e-65a9-4813-8d26-648fedf15e51/sv-benchmarks/c/list-ext2-properties/simple_search_value-2.i[23220,23233] [2024-11-02 12:34:22,090 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:34:22,104 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:34:22,171 WARN L251 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_ebfc244e-65a9-4813-8d26-648fedf15e51/sv-benchmarks/c/list-ext2-properties/simple_search_value-2.i[23220,23233] [2024-11-02 12:34:22,172 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:34:22,214 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:34:22,215 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:34:22 WrapperNode [2024-11-02 12:34:22,215 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:34:22,217 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:34:22,217 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:34:22,217 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:34:22,226 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:34:22" (1/1) ... [2024-11-02 12:34:22,243 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:34:22" (1/1) ... [2024-11-02 12:34:22,269 INFO L138 Inliner]: procedures = 122, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 70 [2024-11-02 12:34:22,270 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:34:22,271 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:34:22,271 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:34:22,271 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:34:22,282 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:34:22" (1/1) ... [2024-11-02 12:34:22,282 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:34:22" (1/1) ... [2024-11-02 12:34:22,286 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:34:22" (1/1) ... [2024-11-02 12:34:22,286 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:34:22" (1/1) ... [2024-11-02 12:34:22,295 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:34:22" (1/1) ... [2024-11-02 12:34:22,303 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:34:22" (1/1) ... [2024-11-02 12:34:22,305 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:34:22" (1/1) ... [2024-11-02 12:34:22,306 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:34:22" (1/1) ... [2024-11-02 12:34:22,312 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:34:22,313 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:34:22,313 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:34:22,313 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:34:22,314 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:34:22" (1/1) ... [2024-11-02 12:34:22,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:34:22,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebfc244e-65a9-4813-8d26-648fedf15e51/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:34:22,352 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebfc244e-65a9-4813-8d26-648fedf15e51/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:34:22,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebfc244e-65a9-4813-8d26-648fedf15e51/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:34:22,398 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2024-11-02 12:34:22,398 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2024-11-02 12:34:22,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-02 12:34:22,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-02 12:34:22,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-02 12:34:22,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:34:22,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-02 12:34:22,402 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-02 12:34:22,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:34:22,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:34:22,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:34:22,576 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:34:22,579 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:34:22,670 INFO L735 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2024-11-02 12:34:22,923 INFO L? ?]: Removed 15 outVars from TransFormulas that were not future-live. [2024-11-02 12:34:22,923 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:34:22,992 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:34:22,996 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-02 12:34:22,997 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:34:22 BoogieIcfgContainer [2024-11-02 12:34:22,997 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:34:23,003 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:34:23,004 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:34:23,010 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:34:23,010 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:34:21" (1/3) ... [2024-11-02 12:34:23,011 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cb50e1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:34:23, skipping insertion in model container [2024-11-02 12:34:23,012 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:34:22" (2/3) ... [2024-11-02 12:34:23,012 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cb50e1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:34:23, skipping insertion in model container [2024-11-02 12:34:23,012 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:34:22" (3/3) ... [2024-11-02 12:34:23,014 INFO L112 eAbstractionObserver]: Analyzing ICFG simple_search_value-2.i [2024-11-02 12:34:23,039 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:34:23,040 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 12:34:23,127 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:34:23,136 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@3c91dc6f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:34:23,136 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 12:34:23,141 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 14 states have (on average 1.5) internal successors, (21), 16 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:34:23,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-02 12:34:23,149 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:34:23,150 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:34:23,151 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:34:23,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:34:23,158 INFO L85 PathProgramCache]: Analyzing trace with hash 357319940, now seen corresponding path program 1 times [2024-11-02 12:34:23,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:34:23,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383768802] [2024-11-02 12:34:23,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:34:23,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:34:23,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:34:23,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:34:23,386 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:34:23,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383768802] [2024-11-02 12:34:23,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383768802] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:34:23,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:34:23,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 12:34:23,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296566802] [2024-11-02 12:34:23,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:34:23,396 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-02 12:34:23,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:34:23,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-02 12:34:23,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-02 12:34:23,431 INFO L87 Difference]: Start difference. First operand has 18 states, 14 states have (on average 1.5) internal successors, (21), 16 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:34:23,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:34:23,468 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2024-11-02 12:34:23,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-02 12:34:23,476 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2024-11-02 12:34:23,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:34:23,491 INFO L225 Difference]: With dead ends: 25 [2024-11-02 12:34:23,491 INFO L226 Difference]: Without dead ends: 12 [2024-11-02 12:34:23,494 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-02 12:34:23,499 INFO L432 NwaCegarLoop]: 16 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, 16 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 [2024-11-02 12:34:23,500 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:34:23,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2024-11-02 12:34:23,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2024-11-02 12:34:23,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 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) [2024-11-02 12:34:23,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2024-11-02 12:34:23,538 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2024-11-02 12:34:23,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:34:23,539 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2024-11-02 12:34:23,539 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:34:23,540 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2024-11-02 12:34:23,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-02 12:34:23,540 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:34:23,541 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:34:23,541 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:34:23,542 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:34:23,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:34:23,543 INFO L85 PathProgramCache]: Analyzing trace with hash -190520792, now seen corresponding path program 1 times [2024-11-02 12:34:23,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:34:23,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142159534] [2024-11-02 12:34:23,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:34:23,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:34:23,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:34:23,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:34:23,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:34:23,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142159534] [2024-11-02 12:34:23,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142159534] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:34:23,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:34:23,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:34:23,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495131503] [2024-11-02 12:34:23,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:34:23,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:34:23,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:34:23,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:34:23,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:34:23,761 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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) [2024-11-02 12:34:23,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:34:23,864 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2024-11-02 12:34:23,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 12:34:23,865 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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 [2024-11-02 12:34:23,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:34:23,866 INFO L225 Difference]: With dead ends: 21 [2024-11-02 12:34:23,866 INFO L226 Difference]: Without dead ends: 18 [2024-11-02 12:34:23,867 INFO L431 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 [2024-11-02 12:34:23,868 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 10 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:34:23,869 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 10 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:34:23,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-02 12:34:23,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2024-11-02 12:34:23,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:34:23,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2024-11-02 12:34:23,886 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2024-11-02 12:34:23,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:34:23,890 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2024-11-02 12:34:23,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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) [2024-11-02 12:34:23,891 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2024-11-02 12:34:23,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-02 12:34:23,892 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:34:23,892 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:34:23,892 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 12:34:23,893 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:34:23,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:34:23,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1611067690, now seen corresponding path program 1 times [2024-11-02 12:34:23,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:34:23,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186906471] [2024-11-02 12:34:23,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:34:23,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:34:23,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:34:24,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:34:24,169 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:34:24,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186906471] [2024-11-02 12:34:24,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186906471] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:34:24,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:34:24,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:34:24,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833883129] [2024-11-02 12:34:24,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:34:24,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:34:24,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:34:24,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:34:24,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:34:24,175 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:34:24,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:34:24,235 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2024-11-02 12:34:24,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:34:24,237 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-02 12:34:24,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:34:24,238 INFO L225 Difference]: With dead ends: 23 [2024-11-02 12:34:24,238 INFO L226 Difference]: Without dead ends: 17 [2024-11-02 12:34:24,239 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:34:24,240 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:34:24,244 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 18 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:34:24,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-11-02 12:34:24,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2024-11-02 12:34:24,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:34:24,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2024-11-02 12:34:24,257 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2024-11-02 12:34:24,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:34:24,258 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2024-11-02 12:34:24,258 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:34:24,258 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2024-11-02 12:34:24,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-02 12:34:24,259 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:34:24,259 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:34:24,259 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 12:34:24,260 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:34:24,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:34:24,261 INFO L85 PathProgramCache]: Analyzing trace with hash -671746793, now seen corresponding path program 1 times [2024-11-02 12:34:24,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:34:24,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216336408] [2024-11-02 12:34:24,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:34:24,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:34:24,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:34:24,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:34:24,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:34:24,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216336408] [2024-11-02 12:34:24,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216336408] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:34:24,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27951096] [2024-11-02 12:34:24,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:34:24,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:34:24,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebfc244e-65a9-4813-8d26-648fedf15e51/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:34:24,649 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebfc244e-65a9-4813-8d26-648fedf15e51/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:34:24,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebfc244e-65a9-4813-8d26-648fedf15e51/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:34:24,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:34:24,822 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-02 12:34:24,833 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:34:24,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:34:24,930 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:34:25,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:34:25,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27951096] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:34:25,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1778768837] [2024-11-02 12:34:25,031 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-02 12:34:25,032 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:34:25,037 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:34:25,045 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:34:25,048 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:34:28,678 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:34:29,317 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '257#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-02 12:34:29,317 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:34:29,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:34:29,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-11-02 12:34:29,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325380871] [2024-11-02 12:34:29,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:34:29,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-02 12:34:29,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:34:29,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-02 12:34:29,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-02 12:34:29,320 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 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) [2024-11-02 12:34:29,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:34:29,458 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2024-11-02 12:34:29,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-02 12:34:29,459 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 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) Word has length 14 [2024-11-02 12:34:29,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:34:29,460 INFO L225 Difference]: With dead ends: 35 [2024-11-02 12:34:29,460 INFO L226 Difference]: Without dead ends: 29 [2024-11-02 12:34:29,461 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2024-11-02 12:34:29,462 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 6 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:34:29,463 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 29 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:34:29,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-02 12:34:29,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2024-11-02 12:34:29,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:34:29,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2024-11-02 12:34:29,473 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 14 [2024-11-02 12:34:29,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:34:29,474 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2024-11-02 12:34:29,474 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 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) [2024-11-02 12:34:29,474 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2024-11-02 12:34:29,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-02 12:34:29,475 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:34:29,475 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:34:29,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebfc244e-65a9-4813-8d26-648fedf15e51/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-02 12:34:29,677 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebfc244e-65a9-4813-8d26-648fedf15e51/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:34:29,677 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:34:29,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:34:29,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1624470746, now seen corresponding path program 2 times [2024-11-02 12:34:29,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:34:29,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840840684] [2024-11-02 12:34:29,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:34:29,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:34:29,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:34:30,061 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:34:30,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:34:30,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840840684] [2024-11-02 12:34:30,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840840684] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:34:30,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738265720] [2024-11-02 12:34:30,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-02 12:34:30,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:34:30,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebfc244e-65a9-4813-8d26-648fedf15e51/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:34:30,069 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebfc244e-65a9-4813-8d26-648fedf15e51/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:34:30,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebfc244e-65a9-4813-8d26-648fedf15e51/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 12:34:30,504 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-02 12:34:30,505 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:34:30,507 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-02 12:34:30,511 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:34:30,570 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:34:30,570 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:34:30,702 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:34:30,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738265720] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:34:30,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1625314788] [2024-11-02 12:34:30,705 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-02 12:34:30,706 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:34:30,706 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:34:30,706 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:34:30,707 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:34:31,570 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:34:32,051 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '513#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-02 12:34:32,052 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:34:32,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:34:32,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2024-11-02 12:34:32,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686762857] [2024-11-02 12:34:32,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:34:32,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-02 12:34:32,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:34:32,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-02 12:34:32,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2024-11-02 12:34:32,055 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:34:32,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:34:32,334 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2024-11-02 12:34:32,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-02 12:34:32,338 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-11-02 12:34:32,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:34:32,340 INFO L225 Difference]: With dead ends: 59 [2024-11-02 12:34:32,342 INFO L226 Difference]: Without dead ends: 53 [2024-11-02 12:34:32,343 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=232, Invalid=638, Unknown=0, NotChecked=0, Total=870 [2024-11-02 12:34:32,344 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 6 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:34:32,345 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 36 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:34:32,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-02 12:34:32,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2024-11-02 12:34:32,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:34:32,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2024-11-02 12:34:32,364 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 26 [2024-11-02 12:34:32,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:34:32,365 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2024-11-02 12:34:32,365 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:34:32,366 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2024-11-02 12:34:32,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-02 12:34:32,367 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:34:32,367 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:34:32,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebfc244e-65a9-4813-8d26-648fedf15e51/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-02 12:34:32,573 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebfc244e-65a9-4813-8d26-648fedf15e51/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:34:32,574 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:34:32,574 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:34:32,575 INFO L85 PathProgramCache]: Analyzing trace with hash -585920800, now seen corresponding path program 3 times [2024-11-02 12:34:32,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:34:32,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45158623] [2024-11-02 12:34:32,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:34:32,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:34:32,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:34:39,605 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2024-11-02 12:34:39,606 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:34:39,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45158623] [2024-11-02 12:34:39,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45158623] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:34:39,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077118365] [2024-11-02 12:34:39,609 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-02 12:34:39,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:34:39,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebfc244e-65a9-4813-8d26-648fedf15e51/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:34:39,612 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebfc244e-65a9-4813-8d26-648fedf15e51/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:34:39,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebfc244e-65a9-4813-8d26-648fedf15e51/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 12:34:46,689 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-02 12:34:46,689 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:34:46,701 INFO L255 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 157 conjuncts are in the unsatisfiable core [2024-11-02 12:34:46,712 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:34:46,750 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 [2024-11-02 12:34:46,847 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-02 12:34:46,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-02 12:34:46,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 [2024-11-02 12:34:47,010 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-11-02 12:34:47,011 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 1 case distinctions, treesize of input 32 treesize of output 23 [2024-11-02 12:34:47,044 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-02 12:34:47,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-02 12:34:47,146 INFO L349 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2024-11-02 12:34:47,147 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 45 [2024-11-02 12:34:47,241 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-02 12:34:47,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-02 12:34:47,276 INFO L349 Elim1Store]: treesize reduction 36, result has 29.4 percent of original size [2024-11-02 12:34:47,276 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 37 [2024-11-02 12:34:47,295 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 12 treesize of output 8 [2024-11-02 12:34:47,457 INFO L349 Elim1Store]: treesize reduction 60, result has 27.7 percent of original size [2024-11-02 12:34:47,458 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 47 [2024-11-02 12:34:47,771 INFO L349 Elim1Store]: treesize reduction 56, result has 36.4 percent of original size [2024-11-02 12:34:47,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 136 treesize of output 111 [2024-11-02 12:34:47,859 INFO L349 Elim1Store]: treesize reduction 94, result has 42.0 percent of original size [2024-11-02 12:34:47,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 82 treesize of output 132 [2024-11-02 12:34:48,184 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 33 treesize of output 17 [2024-11-02 12:34:48,218 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 7 treesize of output 3 [2024-11-02 12:34:48,239 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 33 treesize of output 17 [2024-11-02 12:34:49,814 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-02 12:34:49,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 262 treesize of output 886