./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 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_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje --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 9f971bd1a6fba471cdece6d295ca31488341eb806ea8364f7549d05755c7a031 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 04:29:28,345 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 04:29:28,440 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 04:29:28,448 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 04:29:28,451 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 04:29:28,488 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 04:29:28,489 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 04:29:28,490 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 04:29:28,491 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 04:29:28,492 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 04:29:28,493 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 04:29:28,493 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 04:29:28,494 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 04:29:28,494 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 04:29:28,496 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 04:29:28,497 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 04:29:28,497 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 04:29:28,498 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 04:29:28,498 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 04:29:28,498 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 04:29:28,499 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 04:29:28,503 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 04:29:28,503 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 04:29:28,504 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 04:29:28,504 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 04:29:28,504 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 04:29:28,505 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 04:29:28,505 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 04:29:28,505 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 04:29:28,505 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 04:29:28,506 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 04:29:28,506 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 04:29:28,506 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 04:29:28,509 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 04:29:28,510 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 04:29:28,511 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 04:29:28,511 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 04:29:28,511 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 04:29:28,511 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 04:29:28,512 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 04:29:28,512 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 04:29:28,514 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 04:29:28,514 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 04:29:28,514 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 04:29:28,515 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 04:29:28,516 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 04:29:28,516 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 04:29:28,516 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_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9f971bd1a6fba471cdece6d295ca31488341eb806ea8364f7549d05755c7a031 [2024-11-09 04:29:28,811 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 04:29:28,842 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 04:29:28,845 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 04:29:28,847 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 04:29:28,847 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 04:29:28,849 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c Unable to find full path for "g++" [2024-11-09 04:29:30,798 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 04:29:30,995 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 04:29:30,996 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c [2024-11-09 04:29:31,003 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/data/6ed07edbb/b954d457adb743aeb339148bb8cab102/FLAG61987d524 [2024-11-09 04:29:31,023 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/data/6ed07edbb/b954d457adb743aeb339148bb8cab102 [2024-11-09 04:29:31,026 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 04:29:31,029 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 04:29:31,031 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 04:29:31,031 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 04:29:31,037 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 04:29:31,038 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:29:31" (1/1) ... [2024-11-09 04:29:31,041 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c92b8fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:31, skipping insertion in model container [2024-11-09 04:29:31,041 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:29:31" (1/1) ... [2024-11-09 04:29:31,069 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 04:29:31,264 WARN L250 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_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c[526,539] [2024-11-09 04:29:31,284 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 04:29:31,295 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 04:29:31,307 WARN L250 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_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c[526,539] [2024-11-09 04:29:31,314 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 04:29:31,330 INFO L204 MainTranslator]: Completed translation [2024-11-09 04:29:31,331 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:31 WrapperNode [2024-11-09 04:29:31,331 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 04:29:31,332 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 04:29:31,332 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 04:29:31,332 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 04:29:31,340 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:31" (1/1) ... [2024-11-09 04:29:31,350 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:31" (1/1) ... [2024-11-09 04:29:31,369 INFO L138 Inliner]: procedures = 14, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2024-11-09 04:29:31,369 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 04:29:31,370 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 04:29:31,370 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 04:29:31,370 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 04:29:31,378 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:31" (1/1) ... [2024-11-09 04:29:31,378 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:31" (1/1) ... [2024-11-09 04:29:31,380 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:31" (1/1) ... [2024-11-09 04:29:31,380 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:31" (1/1) ... [2024-11-09 04:29:31,384 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:31" (1/1) ... [2024-11-09 04:29:31,387 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:31" (1/1) ... [2024-11-09 04:29:31,389 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:31" (1/1) ... [2024-11-09 04:29:31,390 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:31" (1/1) ... [2024-11-09 04:29:31,391 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 04:29:31,392 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 04:29:31,393 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 04:29:31,393 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 04:29:31,394 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:31" (1/1) ... [2024-11-09 04:29:31,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 04:29:31,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:31,435 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 04:29:31,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 04:29:31,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 04:29:31,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 04:29:31,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 04:29:31,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 04:29:31,475 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-09 04:29:31,475 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-09 04:29:31,558 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 04:29:31,560 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 04:29:31,763 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-11-09 04:29:31,763 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 04:29:31,817 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 04:29:31,818 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-09 04:29:31,818 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:29:31 BoogieIcfgContainer [2024-11-09 04:29:31,818 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 04:29:31,821 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 04:29:31,821 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 04:29:31,826 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 04:29:31,827 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 04:29:31" (1/3) ... [2024-11-09 04:29:31,828 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ff6c3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:29:31, skipping insertion in model container [2024-11-09 04:29:31,828 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:31" (2/3) ... [2024-11-09 04:29:31,828 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ff6c3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:29:31, skipping insertion in model container [2024-11-09 04:29:31,828 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:29:31" (3/3) ... [2024-11-09 04:29:31,830 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound10.c [2024-11-09 04:29:31,868 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 04:29:31,869 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 04:29:31,965 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 04:29:31,974 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;@3c662a7c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 04:29:31,975 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 04:29:31,979 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-09 04:29:31,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 04:29:31,989 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:31,990 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:29:31,992 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:31,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:32,001 INFO L85 PathProgramCache]: Analyzing trace with hash -513815021, now seen corresponding path program 1 times [2024-11-09 04:29:32,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:32,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089049000] [2024-11-09 04:29:32,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:32,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:32,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:32,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:29:32,193 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:32,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089049000] [2024-11-09 04:29:32,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089049000] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:29:32,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:29:32,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 04:29:32,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188367559] [2024-11-09 04:29:32,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:29:32,201 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-09 04:29:32,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:32,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-09 04:29:32,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 04:29:32,233 INFO L87 Difference]: Start difference. First operand has 22 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:29:32,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:32,275 INFO L93 Difference]: Finished difference Result 43 states and 74 transitions. [2024-11-09 04:29:32,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-09 04:29:32,278 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-09 04:29:32,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:32,284 INFO L225 Difference]: With dead ends: 43 [2024-11-09 04:29:32,285 INFO L226 Difference]: Without dead ends: 20 [2024-11-09 04:29:32,288 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 [2024-11-09 04:29:32,292 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:32,293 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 04:29:32,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-09 04:29:32,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-11-09 04:29:32,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-09 04:29:32,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 29 transitions. [2024-11-09 04:29:32,355 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 29 transitions. Word has length 7 [2024-11-09 04:29:32,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:32,357 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 29 transitions. [2024-11-09 04:29:32,357 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:29:32,358 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 29 transitions. [2024-11-09 04:29:32,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 04:29:32,359 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:32,360 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:29:32,360 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 04:29:32,361 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:32,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:32,363 INFO L85 PathProgramCache]: Analyzing trace with hash -974949910, now seen corresponding path program 1 times [2024-11-09 04:29:32,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:32,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223992130] [2024-11-09 04:29:32,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:32,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:32,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:32,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:29:32,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:32,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223992130] [2024-11-09 04:29:32,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223992130] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:29:32,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:29:32,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 04:29:32,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188313306] [2024-11-09 04:29:32,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:29:32,622 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 04:29:32,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:32,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 04:29:32,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:29:32,624 INFO L87 Difference]: Start difference. First operand 20 states and 29 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:29:32,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:32,703 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2024-11-09 04:29:32,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 04:29:32,704 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-09 04:29:32,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:32,705 INFO L225 Difference]: With dead ends: 33 [2024-11-09 04:29:32,705 INFO L226 Difference]: Without dead ends: 31 [2024-11-09 04:29:32,706 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:29:32,707 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:32,708 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 82 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 04:29:32,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-09 04:29:32,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2024-11-09 04:29:32,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-09 04:29:32,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2024-11-09 04:29:32,719 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 7 [2024-11-09 04:29:32,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:32,719 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2024-11-09 04:29:32,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:29:32,720 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2024-11-09 04:29:32,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 04:29:32,720 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:32,720 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:29:32,721 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 04:29:32,721 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:32,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:32,722 INFO L85 PathProgramCache]: Analyzing trace with hash 756875265, now seen corresponding path program 1 times [2024-11-09 04:29:32,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:32,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112161645] [2024-11-09 04:29:32,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:32,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:32,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:32,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:29:32,800 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:32,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112161645] [2024-11-09 04:29:32,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112161645] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:29:32,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:29:32,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:29:32,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477434712] [2024-11-09 04:29:32,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:29:32,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:29:32,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:32,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:29:32,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:29:32,803 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:29:32,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:32,835 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2024-11-09 04:29:32,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:29:32,836 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-09 04:29:32,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:32,837 INFO L225 Difference]: With dead ends: 39 [2024-11-09 04:29:32,837 INFO L226 Difference]: Without dead ends: 26 [2024-11-09 04:29:32,837 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:29:32,839 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:32,839 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 73 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 04:29:32,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-09 04:29:32,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-11-09 04:29:32,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.3125) internal successors, (21), 17 states have internal predecessors, (21), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-09 04:29:32,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2024-11-09 04:29:32,847 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 9 [2024-11-09 04:29:32,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:32,848 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2024-11-09 04:29:32,848 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:29:32,848 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2024-11-09 04:29:32,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-09 04:29:32,849 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:32,849 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:29:32,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 04:29:32,850 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:32,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:32,850 INFO L85 PathProgramCache]: Analyzing trace with hash -408725012, now seen corresponding path program 1 times [2024-11-09 04:29:32,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:32,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671741453] [2024-11-09 04:29:32,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:32,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:32,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:33,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:29:33,011 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:33,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671741453] [2024-11-09 04:29:33,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671741453] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:29:33,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:29:33,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 04:29:33,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415748367] [2024-11-09 04:29:33,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:29:33,016 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 04:29:33,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:33,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 04:29:33,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:29:33,018 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 04:29:33,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:33,113 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2024-11-09 04:29:33,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 04:29:33,114 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), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2024-11-09 04:29:33,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:33,115 INFO L225 Difference]: With dead ends: 39 [2024-11-09 04:29:33,115 INFO L226 Difference]: Without dead ends: 37 [2024-11-09 04:29:33,116 INFO L431 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 [2024-11-09 04:29:33,117 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 10 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:33,120 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 83 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:29:33,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-09 04:29:33,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2024-11-09 04:29:33,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-09 04:29:33,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2024-11-09 04:29:33,136 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 12 [2024-11-09 04:29:33,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:33,137 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2024-11-09 04:29:33,137 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 04:29:33,137 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2024-11-09 04:29:33,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-09 04:29:33,138 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:33,138 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:29:33,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 04:29:33,140 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:33,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:33,141 INFO L85 PathProgramCache]: Analyzing trace with hash -316982550, now seen corresponding path program 1 times [2024-11-09 04:29:33,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:33,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310351638] [2024-11-09 04:29:33,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:33,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:33,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 04:29:33,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [97398298] [2024-11-09 04:29:33,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:33,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:33,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:33,168 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:29:33,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 04:29:33,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:33,243 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 04:29:33,248 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:29:33,462 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 04:29:33,466 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:29:33,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:33,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310351638] [2024-11-09 04:29:33,468 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 04:29:33,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97398298] [2024-11-09 04:29:33,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97398298] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:29:33,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:29:33,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 04:29:33,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776113877] [2024-11-09 04:29:33,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:29:33,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 04:29:33,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:33,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 04:29:33,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:29:33,474 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:29:33,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:33,590 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2024-11-09 04:29:33,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 04:29:33,591 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), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2024-11-09 04:29:33,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:33,592 INFO L225 Difference]: With dead ends: 58 [2024-11-09 04:29:33,592 INFO L226 Difference]: Without dead ends: 44 [2024-11-09 04:29:33,593 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:29:33,594 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:33,595 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 82 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:29:33,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-09 04:29:33,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-11-09 04:29:33,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 28 states have internal predecessors, (33), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-09 04:29:33,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 57 transitions. [2024-11-09 04:29:33,606 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 57 transitions. Word has length 17 [2024-11-09 04:29:33,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:33,606 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 57 transitions. [2024-11-09 04:29:33,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:29:33,606 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 57 transitions. [2024-11-09 04:29:33,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-09 04:29:33,607 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:33,608 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:29:33,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 04:29:33,812 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:33,812 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:33,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:33,813 INFO L85 PathProgramCache]: Analyzing trace with hash 65356806, now seen corresponding path program 1 times [2024-11-09 04:29:33,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:33,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103019402] [2024-11-09 04:29:33,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:33,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:33,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:33,995 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 04:29:33,995 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:33,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103019402] [2024-11-09 04:29:33,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103019402] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:29:33,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:29:33,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 04:29:33,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236857752] [2024-11-09 04:29:33,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:29:33,997 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 04:29:33,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:33,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 04:29:34,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:29:34,001 INFO L87 Difference]: Start difference. First operand 44 states and 57 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-09 04:29:34,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:34,075 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2024-11-09 04:29:34,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 04:29:34,076 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2024-11-09 04:29:34,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:34,078 INFO L225 Difference]: With dead ends: 63 [2024-11-09 04:29:34,078 INFO L226 Difference]: Without dead ends: 56 [2024-11-09 04:29:34,078 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:29:34,079 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:34,080 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 102 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:29:34,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-09 04:29:34,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2024-11-09 04:29:34,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 36 states have internal predecessors, (41), 12 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-09 04:29:34,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2024-11-09 04:29:34,092 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 25 [2024-11-09 04:29:34,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:34,093 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2024-11-09 04:29:34,093 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-09 04:29:34,093 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2024-11-09 04:29:34,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-09 04:29:34,094 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:34,094 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:29:34,094 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 04:29:34,094 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:34,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:34,095 INFO L85 PathProgramCache]: Analyzing trace with hash 67084684, now seen corresponding path program 1 times [2024-11-09 04:29:34,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:34,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305056412] [2024-11-09 04:29:34,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:34,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:34,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 04:29:34,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [304759018] [2024-11-09 04:29:34,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:34,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:34,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:34,124 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:29:34,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 04:29:34,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:34,189 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 04:29:34,191 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:29:34,320 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 04:29:34,320 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:29:34,551 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 04:29:34,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:34,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305056412] [2024-11-09 04:29:34,552 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 04:29:34,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304759018] [2024-11-09 04:29:34,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304759018] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:29:34,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1708348857] [2024-11-09 04:29:34,577 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 04:29:34,577 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:29:34,581 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:29:34,587 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:29:34,587 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:29:35,513 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 10 for LOIs [2024-11-09 04:29:35,521 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:29:36,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1708348857] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:29:36,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 04:29:36,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 7] total 18 [2024-11-09 04:29:36,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327205495] [2024-11-09 04:29:36,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:29:36,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 04:29:36,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:36,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 04:29:36,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2024-11-09 04:29:36,855 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-09 04:29:37,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:37,148 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2024-11-09 04:29:37,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 04:29:37,149 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2024-11-09 04:29:37,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:37,150 INFO L225 Difference]: With dead ends: 61 [2024-11-09 04:29:37,150 INFO L226 Difference]: Without dead ends: 59 [2024-11-09 04:29:37,151 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2024-11-09 04:29:37,152 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:37,152 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 67 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 04:29:37,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-09 04:29:37,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-11-09 04:29:37,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 39 states have internal predecessors, (44), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-09 04:29:37,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2024-11-09 04:29:37,175 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 25 [2024-11-09 04:29:37,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:37,177 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2024-11-09 04:29:37,177 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-09 04:29:37,177 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2024-11-09 04:29:37,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-09 04:29:37,178 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:37,178 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:29:37,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-09 04:29:37,378 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-09 04:29:37,379 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:37,379 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:37,380 INFO L85 PathProgramCache]: Analyzing trace with hash -798302453, now seen corresponding path program 1 times [2024-11-09 04:29:37,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:37,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692923008] [2024-11-09 04:29:37,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:37,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:37,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:37,510 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 04:29:37,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:37,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692923008] [2024-11-09 04:29:37,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692923008] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:29:37,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153191344] [2024-11-09 04:29:37,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:37,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:37,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:37,513 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:29:37,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 04:29:37,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:37,570 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 04:29:37,571 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:29:37,626 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 04:29:37,626 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:29:37,679 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 04:29:37,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153191344] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:29:37,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [830503355] [2024-11-09 04:29:37,681 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 04:29:37,682 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:29:37,682 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:29:37,682 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:29:37,682 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:29:39,595 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 10 for LOIs [2024-11-09 04:29:39,606 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:29:40,980 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1352#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 04:29:40,980 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:29:40,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:29:40,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 5] total 10 [2024-11-09 04:29:40,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33353435] [2024-11-09 04:29:40,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:29:40,981 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 04:29:40,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:40,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 04:29:40,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2024-11-09 04:29:40,982 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-09 04:29:41,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:41,177 INFO L93 Difference]: Finished difference Result 124 states and 147 transitions. [2024-11-09 04:29:41,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 04:29:41,178 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 27 [2024-11-09 04:29:41,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:41,180 INFO L225 Difference]: With dead ends: 124 [2024-11-09 04:29:41,180 INFO L226 Difference]: Without dead ends: 111 [2024-11-09 04:29:41,181 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2024-11-09 04:29:41,184 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 52 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:41,184 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 112 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:29:41,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-11-09 04:29:41,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 106. [2024-11-09 04:29:41,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 67 states have (on average 1.1791044776119404) internal successors, (79), 70 states have internal predecessors, (79), 24 states have call successors, (24), 14 states have call predecessors, (24), 14 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-11-09 04:29:41,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 124 transitions. [2024-11-09 04:29:41,207 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 124 transitions. Word has length 27 [2024-11-09 04:29:41,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:41,207 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 124 transitions. [2024-11-09 04:29:41,208 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-09 04:29:41,208 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 124 transitions. [2024-11-09 04:29:41,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-09 04:29:41,209 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:41,209 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-09 04:29:41,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 04:29:41,412 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:41,413 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:41,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:41,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1522954228, now seen corresponding path program 1 times [2024-11-09 04:29:41,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:41,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90072681] [2024-11-09 04:29:41,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:41,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:41,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 04:29:41,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [291224696] [2024-11-09 04:29:41,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:41,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:41,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:41,443 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:29:41,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 04:29:41,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:41,502 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-09 04:29:41,504 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:29:41,605 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-09 04:29:41,606 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:29:41,693 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-09 04:29:41,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:41,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90072681] [2024-11-09 04:29:41,694 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 04:29:41,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291224696] [2024-11-09 04:29:41,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291224696] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 04:29:41,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:29:41,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-11-09 04:29:41,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051335955] [2024-11-09 04:29:41,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:29:41,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 04:29:41,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:41,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 04:29:41,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:29:41,695 INFO L87 Difference]: Start difference. First operand 106 states and 124 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-09 04:29:43,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 04:29:43,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:43,613 INFO L93 Difference]: Finished difference Result 129 states and 152 transitions. [2024-11-09 04:29:43,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 04:29:43,613 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2024-11-09 04:29:43,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:43,615 INFO L225 Difference]: With dead ends: 129 [2024-11-09 04:29:43,615 INFO L226 Difference]: Without dead ends: 127 [2024-11-09 04:29:43,615 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-09 04:29:43,616 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 8 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:43,616 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 85 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-09 04:29:43,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-11-09 04:29:43,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 122. [2024-11-09 04:29:43,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 78 states have (on average 1.1666666666666667) internal successors, (91), 82 states have internal predecessors, (91), 26 states have call successors, (26), 17 states have call predecessors, (26), 17 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2024-11-09 04:29:43,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 140 transitions. [2024-11-09 04:29:43,638 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 140 transitions. Word has length 35 [2024-11-09 04:29:43,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:43,639 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 140 transitions. [2024-11-09 04:29:43,639 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-09 04:29:43,639 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 140 transitions. [2024-11-09 04:29:43,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-09 04:29:43,640 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:43,640 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:29:43,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 04:29:43,844 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-09 04:29:43,844 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:43,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:43,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1979605679, now seen corresponding path program 1 times [2024-11-09 04:29:43,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:43,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018988365] [2024-11-09 04:29:43,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:43,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:43,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 04:29:43,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1296663660] [2024-11-09 04:29:43,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:43,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:43,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:43,866 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:29:43,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 04:29:43,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:43,919 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 04:29:43,921 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:29:44,012 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-09 04:29:44,012 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:29:44,148 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-09 04:29:44,149 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:44,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018988365] [2024-11-09 04:29:44,149 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 04:29:44,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296663660] [2024-11-09 04:29:44,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296663660] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:29:44,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1497209338] [2024-11-09 04:29:44,153 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:29:44,153 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:29:44,153 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:29:44,153 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:29:44,153 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:29:44,712 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 10 for LOIs [2024-11-09 04:29:44,721 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:29:45,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1497209338] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:29:45,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 04:29:45,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [7, 7] total 19 [2024-11-09 04:29:45,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539605838] [2024-11-09 04:29:45,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:29:45,859 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 04:29:45,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:45,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 04:29:45,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2024-11-09 04:29:45,860 INFO L87 Difference]: Start difference. First operand 122 states and 140 transitions. Second operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 04:29:46,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:46,103 INFO L93 Difference]: Finished difference Result 124 states and 141 transitions. [2024-11-09 04:29:46,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 04:29:46,104 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2024-11-09 04:29:46,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:46,107 INFO L225 Difference]: With dead ends: 124 [2024-11-09 04:29:46,109 INFO L226 Difference]: Without dead ends: 103 [2024-11-09 04:29:46,110 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 83 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2024-11-09 04:29:46,111 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:46,111 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 52 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:29:46,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-11-09 04:29:46,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2024-11-09 04:29:46,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 69 states have internal predecessors, (77), 22 states have call successors, (22), 14 states have call predecessors, (22), 14 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2024-11-09 04:29:46,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 119 transitions. [2024-11-09 04:29:46,142 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 119 transitions. Word has length 36 [2024-11-09 04:29:46,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:46,142 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 119 transitions. [2024-11-09 04:29:46,142 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 04:29:46,142 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 119 transitions. [2024-11-09 04:29:46,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-09 04:29:46,143 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:46,143 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:29:46,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 04:29:46,344 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 04:29:46,344 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:46,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:46,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1942499568, now seen corresponding path program 1 times [2024-11-09 04:29:46,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:46,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767160941] [2024-11-09 04:29:46,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:46,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:46,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:46,453 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-09 04:29:46,453 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:46,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767160941] [2024-11-09 04:29:46,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767160941] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:29:46,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646292121] [2024-11-09 04:29:46,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:46,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:46,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:46,456 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:29:46,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 04:29:46,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:46,521 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 04:29:46,522 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:29:46,590 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 04:29:46,590 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:29:46,684 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-09 04:29:46,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646292121] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:29:46,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1694987533] [2024-11-09 04:29:46,687 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 04:29:46,687 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:29:46,687 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:29:46,688 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:29:46,688 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:29:48,212 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 10 for LOIs [2024-11-09 04:29:48,228 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:29:49,395 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3179#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 04:29:49,395 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:29:49,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:29:49,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 12 [2024-11-09 04:29:49,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900060787] [2024-11-09 04:29:49,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:29:49,396 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 04:29:49,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:49,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 04:29:49,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2024-11-09 04:29:49,398 INFO L87 Difference]: Start difference. First operand 103 states and 119 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 5 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2024-11-09 04:29:49,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:49,609 INFO L93 Difference]: Finished difference Result 192 states and 227 transitions. [2024-11-09 04:29:49,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 04:29:49,610 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 5 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 43 [2024-11-09 04:29:49,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:49,612 INFO L225 Difference]: With dead ends: 192 [2024-11-09 04:29:49,612 INFO L226 Difference]: Without dead ends: 178 [2024-11-09 04:29:49,613 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2024-11-09 04:29:49,613 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 74 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:49,614 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 141 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:29:49,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-11-09 04:29:49,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 171. [2024-11-09 04:29:49,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 108 states have (on average 1.1574074074074074) internal successors, (125), 115 states have internal predecessors, (125), 40 states have call successors, (40), 22 states have call predecessors, (40), 22 states have return successors, (36), 33 states have call predecessors, (36), 36 states have call successors, (36) [2024-11-09 04:29:49,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 201 transitions. [2024-11-09 04:29:49,648 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 201 transitions. Word has length 43 [2024-11-09 04:29:49,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:49,649 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 201 transitions. [2024-11-09 04:29:49,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 5 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2024-11-09 04:29:49,649 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 201 transitions. [2024-11-09 04:29:49,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-09 04:29:49,650 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:49,650 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:29:49,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 04:29:49,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:49,851 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:49,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:49,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1940771690, now seen corresponding path program 1 times [2024-11-09 04:29:49,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:49,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053759499] [2024-11-09 04:29:49,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:49,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:49,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 04:29:49,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1957570405] [2024-11-09 04:29:49,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:49,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:49,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:49,868 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:29:49,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 04:29:49,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:49,929 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 04:29:49,931 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:29:50,021 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-09 04:29:50,021 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:29:50,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:50,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053759499] [2024-11-09 04:29:50,021 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 04:29:50,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957570405] [2024-11-09 04:29:50,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957570405] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:29:50,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:29:50,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 04:29:50,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655440293] [2024-11-09 04:29:50,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:29:50,023 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 04:29:50,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:50,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 04:29:50,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:29:50,024 INFO L87 Difference]: Start difference. First operand 171 states and 201 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-09 04:29:50,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:50,101 INFO L93 Difference]: Finished difference Result 198 states and 233 transitions. [2024-11-09 04:29:50,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 04:29:50,102 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2024-11-09 04:29:50,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:50,104 INFO L225 Difference]: With dead ends: 198 [2024-11-09 04:29:50,105 INFO L226 Difference]: Without dead ends: 194 [2024-11-09 04:29:50,105 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:29:50,106 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:50,106 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 70 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:29:50,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2024-11-09 04:29:50,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 191. [2024-11-09 04:29:50,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 122 states have (on average 1.1557377049180328) internal successors, (141), 128 states have internal predecessors, (141), 43 states have call successors, (43), 26 states have call predecessors, (43), 25 states have return successors, (39), 36 states have call predecessors, (39), 39 states have call successors, (39) [2024-11-09 04:29:50,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 223 transitions. [2024-11-09 04:29:50,129 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 223 transitions. Word has length 43 [2024-11-09 04:29:50,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:50,130 INFO L471 AbstractCegarLoop]: Abstraction has 191 states and 223 transitions. [2024-11-09 04:29:50,130 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-09 04:29:50,130 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 223 transitions. [2024-11-09 04:29:50,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-09 04:29:50,132 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:50,132 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:29:50,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 04:29:50,334 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:50,335 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:50,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:50,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1115004513, now seen corresponding path program 1 times [2024-11-09 04:29:50,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:50,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253913781] [2024-11-09 04:29:50,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:50,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:50,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 04:29:50,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2113390654] [2024-11-09 04:29:50,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:50,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:50,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:50,370 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:29:50,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 04:29:50,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:50,430 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-09 04:29:50,432 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:29:50,743 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-11-09 04:29:50,744 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:29:54,220 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-11-09 04:29:54,220 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:54,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253913781] [2024-11-09 04:29:54,220 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 04:29:54,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113390654] [2024-11-09 04:29:54,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113390654] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:29:54,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [734713023] [2024-11-09 04:29:54,233 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-09 04:29:54,233 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:29:54,233 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:29:54,233 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:29:54,234 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:29:56,145 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-09 04:29:56,149 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:29:57,276 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4851#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-09 04:29:57,277 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:29:57,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 04:29:57,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-11-09 04:29:57,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814074198] [2024-11-09 04:29:57,277 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 04:29:57,278 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 04:29:57,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:57,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 04:29:57,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2024-11-09 04:29:57,279 INFO L87 Difference]: Start difference. First operand 191 states and 223 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2024-11-09 04:29:58,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:58,241 INFO L93 Difference]: Finished difference Result 239 states and 272 transitions. [2024-11-09 04:29:58,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 04:29:58,242 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 56 [2024-11-09 04:29:58,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:58,244 INFO L225 Difference]: With dead ends: 239 [2024-11-09 04:29:58,244 INFO L226 Difference]: Without dead ends: 229 [2024-11-09 04:29:58,244 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 143 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2024-11-09 04:29:58,245 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 24 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:58,245 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 209 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 04:29:58,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2024-11-09 04:29:58,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 220. [2024-11-09 04:29:58,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 145 states have (on average 1.1310344827586207) internal successors, (164), 152 states have internal predecessors, (164), 42 states have call successors, (42), 32 states have call predecessors, (42), 32 states have return successors, (39), 35 states have call predecessors, (39), 39 states have call successors, (39) [2024-11-09 04:29:58,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 245 transitions. [2024-11-09 04:29:58,299 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 245 transitions. Word has length 56 [2024-11-09 04:29:58,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:58,300 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 245 transitions. [2024-11-09 04:29:58,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2024-11-09 04:29:58,300 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 245 transitions. [2024-11-09 04:29:58,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-09 04:29:58,301 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:58,301 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:29:58,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-09 04:29:58,503 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-09 04:29:58,503 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:58,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:58,504 INFO L85 PathProgramCache]: Analyzing trace with hash -751945065, now seen corresponding path program 2 times [2024-11-09 04:29:58,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:58,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450629149] [2024-11-09 04:29:58,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:58,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:58,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 04:29:58,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1014105234] [2024-11-09 04:29:58,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:29:58,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:58,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:58,542 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:29:58,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 04:29:58,600 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 04:29:58,600 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:29:58,602 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-09 04:29:58,604 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:29:58,788 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 26 proven. 26 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-11-09 04:29:58,788 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:30:00,296 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 26 proven. 26 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-11-09 04:30:00,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:00,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450629149] [2024-11-09 04:30:00,296 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 04:30:00,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014105234] [2024-11-09 04:30:00,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014105234] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:30:00,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [53165989] [2024-11-09 04:30:00,299 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-09 04:30:00,299 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:30:00,299 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:30:00,299 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:30:00,299 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:30:01,752 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-09 04:30:01,755 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:30:02,861 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5965#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-09 04:30:02,861 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:30:02,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 04:30:02,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2024-11-09 04:30:02,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090453833] [2024-11-09 04:30:02,862 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 04:30:02,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-09 04:30:02,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:02,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-09 04:30:02,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2024-11-09 04:30:02,864 INFO L87 Difference]: Start difference. First operand 220 states and 245 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 8 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 8 states have call successors, (18) [2024-11-09 04:30:03,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:03,515 INFO L93 Difference]: Finished difference Result 267 states and 302 transitions. [2024-11-09 04:30:03,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 04:30:03,516 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 8 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 8 states have call successors, (18) Word has length 61 [2024-11-09 04:30:03,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:03,518 INFO L225 Difference]: With dead ends: 267 [2024-11-09 04:30:03,520 INFO L226 Difference]: Without dead ends: 237 [2024-11-09 04:30:03,521 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 155 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2024-11-09 04:30:03,522 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 18 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:03,522 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 190 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 04:30:03,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2024-11-09 04:30:03,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 222. [2024-11-09 04:30:03,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 148 states have (on average 1.114864864864865) internal successors, (165), 153 states have internal predecessors, (165), 40 states have call successors, (40), 33 states have call predecessors, (40), 33 states have return successors, (38), 35 states have call predecessors, (38), 38 states have call successors, (38) [2024-11-09 04:30:03,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 243 transitions. [2024-11-09 04:30:03,588 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 243 transitions. Word has length 61 [2024-11-09 04:30:03,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:03,588 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 243 transitions. [2024-11-09 04:30:03,588 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 8 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 8 states have call successors, (18) [2024-11-09 04:30:03,589 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 243 transitions. [2024-11-09 04:30:03,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-09 04:30:03,591 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:03,591 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:03,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-09 04:30:03,792 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 04:30:03,792 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:30:03,792 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:03,792 INFO L85 PathProgramCache]: Analyzing trace with hash 611197790, now seen corresponding path program 1 times [2024-11-09 04:30:03,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:03,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113411352] [2024-11-09 04:30:03,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:03,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:03,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 04:30:03,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1112179794] [2024-11-09 04:30:03,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:03,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:03,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:30:03,819 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:30:03,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 04:30:03,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:03,893 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-09 04:30:03,896 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:30:04,233 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 19 proven. 39 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-09 04:30:04,233 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:30:04,978 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 19 proven. 39 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-09 04:30:04,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:04,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113411352] [2024-11-09 04:30:04,978 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 04:30:04,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112179794] [2024-11-09 04:30:04,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112179794] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:30:04,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [433027635] [2024-11-09 04:30:04,982 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:30:04,982 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:30:04,983 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:30:04,983 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:30:04,983 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:30:06,435 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-09 04:30:06,438 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:30:07,600 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7157#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-09 04:30:07,600 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:30:07,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 04:30:07,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2024-11-09 04:30:07,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6105979] [2024-11-09 04:30:07,601 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 04:30:07,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 04:30:07,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:07,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 04:30:07,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2024-11-09 04:30:07,603 INFO L87 Difference]: Start difference. First operand 222 states and 243 transitions. Second operand has 19 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 11 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) [2024-11-09 04:30:08,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:08,259 INFO L93 Difference]: Finished difference Result 244 states and 269 transitions. [2024-11-09 04:30:08,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-09 04:30:08,260 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 11 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) Word has length 67 [2024-11-09 04:30:08,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:08,262 INFO L225 Difference]: With dead ends: 244 [2024-11-09 04:30:08,262 INFO L226 Difference]: Without dead ends: 240 [2024-11-09 04:30:08,263 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 169 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=179, Invalid=877, Unknown=0, NotChecked=0, Total=1056 [2024-11-09 04:30:08,264 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 22 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:08,264 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 190 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 04:30:08,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2024-11-09 04:30:08,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 220. [2024-11-09 04:30:08,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 148 states have (on average 1.114864864864865) internal successors, (165), 150 states have internal predecessors, (165), 39 states have call successors, (39), 33 states have call predecessors, (39), 32 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) [2024-11-09 04:30:08,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 241 transitions. [2024-11-09 04:30:08,337 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 241 transitions. Word has length 67 [2024-11-09 04:30:08,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:08,337 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 241 transitions. [2024-11-09 04:30:08,337 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 11 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) [2024-11-09 04:30:08,338 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 241 transitions. [2024-11-09 04:30:08,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-09 04:30:08,339 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:08,339 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:08,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 04:30:08,542 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 04:30:08,543 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:30:08,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:08,543 INFO L85 PathProgramCache]: Analyzing trace with hash -542971976, now seen corresponding path program 1 times [2024-11-09 04:30:08,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:08,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749324017] [2024-11-09 04:30:08,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:08,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:08,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:08,924 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-09 04:30:08,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:08,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749324017] [2024-11-09 04:30:08,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749324017] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:30:08,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54485974] [2024-11-09 04:30:08,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:08,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:08,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:30:08,929 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:30:08,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 04:30:08,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:08,995 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-09 04:30:08,997 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:30:09,183 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-09 04:30:09,184 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:30:09,663 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-09 04:30:09,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54485974] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:30:09,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1036529353] [2024-11-09 04:30:09,665 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 04:30:09,665 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:30:09,666 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:30:09,666 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:30:09,666 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:30:11,160 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-09 04:30:11,163 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:30:12,327 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8335#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-09 04:30:12,327 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:30:12,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:30:12,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-09 04:30:12,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15509612] [2024-11-09 04:30:12,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:30:12,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 04:30:12,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:12,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 04:30:12,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2024-11-09 04:30:12,329 INFO L87 Difference]: Start difference. First operand 220 states and 241 transitions. Second operand has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 8 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2024-11-09 04:30:12,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:12,647 INFO L93 Difference]: Finished difference Result 233 states and 256 transitions. [2024-11-09 04:30:12,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 04:30:12,648 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 8 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) Word has length 72 [2024-11-09 04:30:12,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:12,649 INFO L225 Difference]: With dead ends: 233 [2024-11-09 04:30:12,649 INFO L226 Difference]: Without dead ends: 189 [2024-11-09 04:30:12,650 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 193 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2024-11-09 04:30:12,653 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 14 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:12,653 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 289 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:30:12,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2024-11-09 04:30:12,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 186. [2024-11-09 04:30:12,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 125 states have (on average 1.088) internal successors, (136), 127 states have internal predecessors, (136), 33 states have call successors, (33), 27 states have call predecessors, (33), 27 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2024-11-09 04:30:12,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 201 transitions. [2024-11-09 04:30:12,742 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 201 transitions. Word has length 72 [2024-11-09 04:30:12,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:12,742 INFO L471 AbstractCegarLoop]: Abstraction has 186 states and 201 transitions. [2024-11-09 04:30:12,743 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 8 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2024-11-09 04:30:12,743 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 201 transitions. [2024-11-09 04:30:12,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-09 04:30:12,744 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:12,744 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2024-11-09 04:30:12,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-09 04:30:12,948 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 04:30:12,949 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:30:12,949 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:12,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1276249920, now seen corresponding path program 3 times [2024-11-09 04:30:12,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:12,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338190375] [2024-11-09 04:30:12,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:12,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:12,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 04:30:12,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1568502842] [2024-11-09 04:30:12,982 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 04:30:12,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:12,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:30:12,984 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:30:12,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 04:30:13,099 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 04:30:13,099 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:30:13,101 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-09 04:30:13,105 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:30:19,461 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 139 proven. 42 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2024-11-09 04:30:19,462 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:31:05,674 WARN L286 SmtUtils]: Spent 13.24s on a formula simplification that was a NOOP. DAG size: 122 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 04:31:21,331 WARN L286 SmtUtils]: Spent 6.87s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 04:31:54,695 WARN L286 SmtUtils]: Spent 7.51s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 04:32:48,698 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 133 proven. 30 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2024-11-09 04:32:48,698 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:32:48,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338190375] [2024-11-09 04:32:48,698 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 04:32:48,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568502842] [2024-11-09 04:32:48,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568502842] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:32:48,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1909763837] [2024-11-09 04:32:48,701 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-09 04:32:48,701 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:32:48,701 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:32:48,702 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:32:48,702 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:32:50,308 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-09 04:32:50,313 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:32:52,377 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9547#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-09 04:32:52,377 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:32:52,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 04:32:52,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2024-11-09 04:32:52,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488171020] [2024-11-09 04:32:52,378 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 04:32:52,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-09 04:32:52,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:32:52,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-09 04:32:52,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1026, Unknown=1, NotChecked=0, Total=1260 [2024-11-09 04:32:52,380 INFO L87 Difference]: Start difference. First operand 186 states and 201 transitions. Second operand has 26 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 17 states have internal predecessors, (46), 16 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 12 states have call predecessors, (24), 14 states have call successors, (24) [2024-11-09 04:33:09,035 WARN L286 SmtUtils]: Spent 16.05s on a formula simplification. DAG size of input: 185 DAG size of output: 111 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 04:33:11,068 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 04:33:14,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 04:33:16,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 04:33:22,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 04:33:26,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 04:33:31,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 04:33:39,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 04:34:36,720 WARN L286 SmtUtils]: Spent 50.89s on a formula simplification. DAG size of input: 203 DAG size of output: 166 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 04:34:38,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 04:35:00,449 WARN L286 SmtUtils]: Spent 19.70s on a formula simplification. DAG size of input: 202 DAG size of output: 121 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 04:35:27,502 WARN L286 SmtUtils]: Spent 18.65s on a formula simplification. DAG size of input: 185 DAG size of output: 157 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 04:35:28,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:35:28,721 INFO L93 Difference]: Finished difference Result 239 states and 278 transitions. [2024-11-09 04:35:28,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-09 04:35:28,722 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 17 states have internal predecessors, (46), 16 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 12 states have call predecessors, (24), 14 states have call successors, (24) Word has length 87 [2024-11-09 04:35:28,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:35:28,724 INFO L225 Difference]: With dead ends: 239 [2024-11-09 04:35:28,724 INFO L226 Difference]: Without dead ends: 232 [2024-11-09 04:35:28,725 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 223 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 182.1s TimeCoverageRelationStatistics Valid=467, Invalid=1981, Unknown=2, NotChecked=0, Total=2450 [2024-11-09 04:35:28,726 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 98 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 162 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:35:28,727 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 501 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 310 Invalid, 3 Unknown, 0 Unchecked, 26.1s Time] [2024-11-09 04:35:28,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2024-11-09 04:35:28,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 204. [2024-11-09 04:35:28,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 137 states have (on average 1.102189781021898) internal successors, (151), 141 states have internal predecessors, (151), 38 states have call successors, (38), 28 states have call predecessors, (38), 28 states have return successors, (36), 34 states have call predecessors, (36), 36 states have call successors, (36) [2024-11-09 04:35:28,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 225 transitions. [2024-11-09 04:35:28,811 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 225 transitions. Word has length 87 [2024-11-09 04:35:28,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:35:28,811 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 225 transitions. [2024-11-09 04:35:28,811 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 17 states have internal predecessors, (46), 16 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 12 states have call predecessors, (24), 14 states have call successors, (24) [2024-11-09 04:35:28,811 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 225 transitions. [2024-11-09 04:35:28,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-11-09 04:35:28,813 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:35:28,813 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:35:28,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-09 04:35:29,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 04:35:29,017 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:35:29,017 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:35:29,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1633214112, now seen corresponding path program 1 times [2024-11-09 04:35:29,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:35:29,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602043566] [2024-11-09 04:35:29,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:35:29,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:35:29,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:35:29,258 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2024-11-09 04:35:29,258 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:35:29,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602043566] [2024-11-09 04:35:29,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602043566] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:35:29,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112478066] [2024-11-09 04:35:29,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:35:29,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:35:29,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:35:29,261 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:35:29,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 04:35:29,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:35:29,346 INFO L255 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 04:35:29,349 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:35:29,489 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 120 proven. 260 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-09 04:35:29,490 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:35:29,702 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2024-11-09 04:35:29,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112478066] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:35:29,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [697834970] [2024-11-09 04:35:29,705 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:35:29,705 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:35:29,705 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:35:29,706 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:35:29,706 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:35:30,762 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 10 for LOIs [2024-11-09 04:35:30,772 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:35:32,104 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10858#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 04:35:32,105 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:35:32,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:35:32,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 16 [2024-11-09 04:35:32,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549489401] [2024-11-09 04:35:32,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:35:32,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-09 04:35:32,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:35:32,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-09 04:35:32,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2024-11-09 04:35:32,108 INFO L87 Difference]: Start difference. First operand 204 states and 225 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 9 states have call successors, (41), 6 states have call predecessors, (41), 6 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) [2024-11-09 04:35:32,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:35:32,909 INFO L93 Difference]: Finished difference Result 514 states and 582 transitions. [2024-11-09 04:35:32,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-09 04:35:32,910 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 9 states have call successors, (41), 6 states have call predecessors, (41), 6 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) Word has length 94 [2024-11-09 04:35:32,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:35:32,913 INFO L225 Difference]: With dead ends: 514 [2024-11-09 04:35:32,913 INFO L226 Difference]: Without dead ends: 460 [2024-11-09 04:35:32,914 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=251, Invalid=1009, Unknown=0, NotChecked=0, Total=1260 [2024-11-09 04:35:32,915 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 166 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 04:35:32,916 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 164 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 04:35:32,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2024-11-09 04:35:33,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 319. [2024-11-09 04:35:33,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 210 states have (on average 1.1047619047619048) internal successors, (232), 219 states have internal predecessors, (232), 62 states have call successors, (62), 46 states have call predecessors, (62), 46 states have return successors, (59), 53 states have call predecessors, (59), 59 states have call successors, (59) [2024-11-09 04:35:33,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 353 transitions. [2024-11-09 04:35:33,116 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 353 transitions. Word has length 94 [2024-11-09 04:35:33,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:35:33,117 INFO L471 AbstractCegarLoop]: Abstraction has 319 states and 353 transitions. [2024-11-09 04:35:33,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 9 states have call successors, (41), 6 states have call predecessors, (41), 6 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) [2024-11-09 04:35:33,118 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 353 transitions. [2024-11-09 04:35:33,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-11-09 04:35:33,119 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:35:33,120 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-09 04:35:33,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-09 04:35:33,322 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 04:35:33,322 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:35:33,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:35:33,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1641439005, now seen corresponding path program 2 times [2024-11-09 04:35:33,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:35:33,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513536922] [2024-11-09 04:35:33,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:35:33,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:35:33,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 04:35:33,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2002636771] [2024-11-09 04:35:33,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:35:33,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:35:33,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:35:33,369 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:35:33,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 04:35:33,449 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 04:35:33,449 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:35:33,450 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-09 04:35:33,452 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:35:33,614 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 113 proven. 41 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2024-11-09 04:35:33,614 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:35:33,879 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2024-11-09 04:35:33,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:35:33,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513536922] [2024-11-09 04:35:33,879 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 04:35:33,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002636771] [2024-11-09 04:35:33,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002636771] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:35:33,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1641998361] [2024-11-09 04:35:33,882 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:35:33,882 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:35:33,883 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:35:33,883 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:35:33,883 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:35:35,737 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-09 04:35:35,741 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:35:37,182 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12786#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-09 04:35:37,182 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:35:37,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 04:35:37,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2024-11-09 04:35:37,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424801110] [2024-11-09 04:35:37,183 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 04:35:37,184 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-09 04:35:37,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:35:37,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-09 04:35:37,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2024-11-09 04:35:37,185 INFO L87 Difference]: Start difference. First operand 319 states and 353 transitions. Second operand has 16 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2024-11-09 04:35:37,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:35:37,761 INFO L93 Difference]: Finished difference Result 328 states and 362 transitions. [2024-11-09 04:35:37,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 04:35:37,762 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) Word has length 98 [2024-11-09 04:35:37,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:35:37,765 INFO L225 Difference]: With dead ends: 328 [2024-11-09 04:35:37,766 INFO L226 Difference]: Without dead ends: 318 [2024-11-09 04:35:37,767 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 266 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=178, Invalid=878, Unknown=0, NotChecked=0, Total=1056 [2024-11-09 04:35:37,767 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 54 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:35:37,768 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 144 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:35:37,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2024-11-09 04:35:37,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 301. [2024-11-09 04:35:37,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 200 states have (on average 1.09) internal successors, (218), 208 states have internal predecessors, (218), 56 states have call successors, (56), 44 states have call predecessors, (56), 44 states have return successors, (54), 48 states have call predecessors, (54), 54 states have call successors, (54) [2024-11-09 04:35:38,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 328 transitions. [2024-11-09 04:35:38,001 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 328 transitions. Word has length 98 [2024-11-09 04:35:38,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:35:38,002 INFO L471 AbstractCegarLoop]: Abstraction has 301 states and 328 transitions. [2024-11-09 04:35:38,002 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2024-11-09 04:35:38,002 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 328 transitions. [2024-11-09 04:35:38,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-11-09 04:35:38,005 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:35:38,005 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2024-11-09 04:35:38,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-09 04:35:38,206 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:35:38,207 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:35:38,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:35:38,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1492496977, now seen corresponding path program 1 times [2024-11-09 04:35:38,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:35:38,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261686029] [2024-11-09 04:35:38,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:35:38,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:35:38,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:35:38,664 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-11-09 04:35:38,664 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:35:38,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261686029] [2024-11-09 04:35:38,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261686029] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:35:38,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269538641] [2024-11-09 04:35:38,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:35:38,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:35:38,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:35:38,667 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:35:38,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 04:35:38,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:35:38,763 INFO L255 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 04:35:38,766 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:35:38,962 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 30 proven. 411 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-09 04:35:38,963 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:35:39,188 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-11-09 04:35:39,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269538641] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:35:39,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [758401480] [2024-11-09 04:35:39,191 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:35:39,191 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:35:39,191 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:35:39,192 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:35:39,192 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:35:40,578 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-09 04:35:40,581 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:35:41,973 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14404#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-09 04:35:41,973 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:35:41,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:35:41,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 16 [2024-11-09 04:35:41,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947681109] [2024-11-09 04:35:41,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:35:41,974 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-09 04:35:41,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:35:41,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-09 04:35:41,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2024-11-09 04:35:41,976 INFO L87 Difference]: Start difference. First operand 301 states and 328 transitions. Second operand has 16 states, 16 states have (on average 4.3125) internal successors, (69), 16 states have internal predecessors, (69), 10 states have call successors, (46), 8 states have call predecessors, (46), 7 states have return successors, (45), 9 states have call predecessors, (45), 9 states have call successors, (45) [2024-11-09 04:35:42,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:35:42,561 INFO L93 Difference]: Finished difference Result 405 states and 445 transitions. [2024-11-09 04:35:42,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 04:35:42,562 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 16 states have internal predecessors, (69), 10 states have call successors, (46), 8 states have call predecessors, (46), 7 states have return successors, (45), 9 states have call predecessors, (45), 9 states have call successors, (45) Word has length 100 [2024-11-09 04:35:42,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:35:42,564 INFO L225 Difference]: With dead ends: 405 [2024-11-09 04:35:42,565 INFO L226 Difference]: Without dead ends: 391 [2024-11-09 04:35:42,566 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 275 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=196, Invalid=994, Unknown=0, NotChecked=0, Total=1190 [2024-11-09 04:35:42,566 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 62 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:35:42,567 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 156 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:35:42,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2024-11-09 04:35:42,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 391. [2024-11-09 04:35:42,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 262 states have (on average 1.0572519083969465) internal successors, (277), 270 states have internal predecessors, (277), 72 states have call successors, (72), 56 states have call predecessors, (72), 56 states have return successors, (70), 64 states have call predecessors, (70), 70 states have call successors, (70) [2024-11-09 04:35:42,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 419 transitions. [2024-11-09 04:35:42,784 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 419 transitions. Word has length 100 [2024-11-09 04:35:42,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:35:42,785 INFO L471 AbstractCegarLoop]: Abstraction has 391 states and 419 transitions. [2024-11-09 04:35:42,785 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 16 states have internal predecessors, (69), 10 states have call successors, (46), 8 states have call predecessors, (46), 7 states have return successors, (45), 9 states have call predecessors, (45), 9 states have call successors, (45) [2024-11-09 04:35:42,785 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 419 transitions. [2024-11-09 04:35:42,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2024-11-09 04:35:42,788 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:35:42,789 INFO L215 NwaCegarLoop]: trace histogram [24, 23, 23, 8, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2024-11-09 04:35:42,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-09 04:35:42,992 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:35:42,993 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:35:42,993 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:35:42,993 INFO L85 PathProgramCache]: Analyzing trace with hash 2107830639, now seen corresponding path program 2 times [2024-11-09 04:35:42,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:35:42,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516941471] [2024-11-09 04:35:42,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:35:42,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:35:43,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:35:43,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1195 backedges. 112 proven. 33 refuted. 0 times theorem prover too weak. 1050 trivial. 0 not checked. [2024-11-09 04:35:43,664 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:35:43,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516941471] [2024-11-09 04:35:43,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516941471] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:35:43,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173005161] [2024-11-09 04:35:43,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:35:43,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:35:43,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:35:43,667 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:35:43,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 04:35:43,853 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-11-09 04:35:43,853 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:35:43,856 INFO L255 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-09 04:35:43,858 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:35:43,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1195 backedges. 576 proven. 33 refuted. 0 times theorem prover too weak. 586 trivial. 0 not checked. [2024-11-09 04:35:43,954 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:35:44,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1195 backedges. 112 proven. 33 refuted. 0 times theorem prover too weak. 1050 trivial. 0 not checked. [2024-11-09 04:35:44,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173005161] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:35:44,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [877917593] [2024-11-09 04:35:44,197 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:35:44,197 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:35:44,197 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:35:44,197 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:35:44,197 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:35:45,674 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-09 04:35:45,678 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:35:47,196 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16584#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-09 04:35:47,197 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:35:47,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:35:47,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 9 [2024-11-09 04:35:47,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873774084] [2024-11-09 04:35:47,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:35:47,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 04:35:47,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:35:47,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 04:35:47,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2024-11-09 04:35:47,200 INFO L87 Difference]: Start difference. First operand 391 states and 419 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 8 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (35), 8 states have call predecessors, (35), 8 states have call successors, (35) [2024-11-09 04:35:47,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:35:47,466 INFO L93 Difference]: Finished difference Result 438 states and 471 transitions. [2024-11-09 04:35:47,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 04:35:47,467 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 8 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (35), 8 states have call predecessors, (35), 8 states have call successors, (35) Word has length 152 [2024-11-09 04:35:47,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:35:47,470 INFO L225 Difference]: With dead ends: 438 [2024-11-09 04:35:47,470 INFO L226 Difference]: Without dead ends: 361 [2024-11-09 04:35:47,471 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 434 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2024-11-09 04:35:47,472 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 0 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:35:47,472 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 260 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:35:47,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2024-11-09 04:35:47,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 361. [2024-11-09 04:35:47,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 242 states have (on average 1.0578512396694215) internal successors, (256), 249 states have internal predecessors, (256), 66 states have call successors, (66), 52 states have call predecessors, (66), 52 states have return successors, (64), 59 states have call predecessors, (64), 64 states have call successors, (64) [2024-11-09 04:35:47,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 386 transitions. [2024-11-09 04:35:47,634 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 386 transitions. Word has length 152 [2024-11-09 04:35:47,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:35:47,635 INFO L471 AbstractCegarLoop]: Abstraction has 361 states and 386 transitions. [2024-11-09 04:35:47,635 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 8 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (35), 8 states have call predecessors, (35), 8 states have call successors, (35) [2024-11-09 04:35:47,635 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 386 transitions. [2024-11-09 04:35:47,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2024-11-09 04:35:47,638 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:35:47,638 INFO L215 NwaCegarLoop]: trace histogram [25, 24, 24, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2024-11-09 04:35:47,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-09 04:35:47,839 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:35:47,839 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:35:47,839 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:35:47,840 INFO L85 PathProgramCache]: Analyzing trace with hash 56595076, now seen corresponding path program 3 times [2024-11-09 04:35:47,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:35:47,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787740758] [2024-11-09 04:35:47,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:35:47,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:35:47,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:35:48,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 96 proven. 66 refuted. 0 times theorem prover too weak. 1113 trivial. 0 not checked. [2024-11-09 04:35:48,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:35:48,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787740758] [2024-11-09 04:35:48,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787740758] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:35:48,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034302215] [2024-11-09 04:35:48,658 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 04:35:48,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:35:48,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:35:48,660 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:35:48,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 04:35:49,267 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 04:35:49,267 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:35:49,270 INFO L255 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-09 04:35:49,273 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:35:49,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 552 proven. 75 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2024-11-09 04:35:49,899 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:36:05,965 WARN L286 SmtUtils]: Spent 11.49s on a formula simplification. DAG size of input: 52 DAG size of output: 51 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 04:36:05,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034302215] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:36:05,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1719844653] [2024-11-09 04:36:05,969 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:36:05,969 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:36:05,970 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:36:05,970 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:36:05,970 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:36:07,420 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-09 04:36:07,423 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:36:09,205 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18472#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-09 04:36:09,206 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:36:09,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 04:36:09,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 15] total 19 [2024-11-09 04:36:09,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19689593] [2024-11-09 04:36:09,206 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 04:36:09,207 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 04:36:09,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:36:09,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 04:36:09,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2024-11-09 04:36:09,208 INFO L87 Difference]: Start difference. First operand 361 states and 386 transitions. Second operand has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 17 states have internal predecessors, (64), 14 states have call successors, (45), 2 states have call predecessors, (45), 3 states have return successors, (44), 16 states have call predecessors, (44), 14 states have call successors, (44) [2024-11-09 04:36:09,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:36:09,986 INFO L93 Difference]: Finished difference Result 399 states and 429 transitions. [2024-11-09 04:36:09,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 04:36:09,987 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 17 states have internal predecessors, (64), 14 states have call successors, (45), 2 states have call predecessors, (45), 3 states have return successors, (44), 16 states have call predecessors, (44), 14 states have call successors, (44) Word has length 157 [2024-11-09 04:36:09,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:36:09,990 INFO L225 Difference]: With dead ends: 399 [2024-11-09 04:36:09,990 INFO L226 Difference]: Without dead ends: 331 [2024-11-09 04:36:09,992 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 331 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=121, Invalid=1139, Unknown=0, NotChecked=0, Total=1260 [2024-11-09 04:36:09,992 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 20 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 04:36:09,993 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 514 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 04:36:09,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2024-11-09 04:36:10,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2024-11-09 04:36:10,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 222 states have (on average 1.0585585585585586) internal successors, (235), 228 states have internal predecessors, (235), 60 states have call successors, (60), 48 states have call predecessors, (60), 48 states have return successors, (58), 54 states have call predecessors, (58), 58 states have call successors, (58) [2024-11-09 04:36:10,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 353 transitions. [2024-11-09 04:36:10,233 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 353 transitions. Word has length 157 [2024-11-09 04:36:10,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:36:10,236 INFO L471 AbstractCegarLoop]: Abstraction has 331 states and 353 transitions. [2024-11-09 04:36:10,236 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 17 states have internal predecessors, (64), 14 states have call successors, (45), 2 states have call predecessors, (45), 3 states have return successors, (44), 16 states have call predecessors, (44), 14 states have call successors, (44) [2024-11-09 04:36:10,237 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 353 transitions. [2024-11-09 04:36:10,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2024-11-09 04:36:10,239 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:36:10,239 INFO L215 NwaCegarLoop]: trace histogram [26, 25, 25, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1] [2024-11-09 04:36:10,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-09 04:36:10,440 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-09 04:36:10,440 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:36:10,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:36:10,441 INFO L85 PathProgramCache]: Analyzing trace with hash 684576891, now seen corresponding path program 4 times [2024-11-09 04:36:10,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:36:10,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433892] [2024-11-09 04:36:10,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:36:10,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:36:10,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:36:11,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 60 proven. 110 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2024-11-09 04:36:11,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:36:11,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433892] [2024-11-09 04:36:11,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433892] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:36:11,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615095819] [2024-11-09 04:36:11,369 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 04:36:11,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:36:11,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:36:11,371 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:36:11,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-09 04:36:11,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:36:11,504 INFO L255 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-09 04:36:11,506 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:36:11,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 60 proven. 110 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2024-11-09 04:36:11,690 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:36:12,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 60 proven. 110 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2024-11-09 04:36:12,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615095819] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:36:12,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [993079484] [2024-11-09 04:36:12,232 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:36:12,232 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:36:12,233 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:36:12,233 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:36:12,233 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:36:13,924 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-09 04:36:13,929 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:36:15,539 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20603#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-09 04:36:15,539 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:36:15,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:36:15,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 7] total 15 [2024-11-09 04:36:15,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690857812] [2024-11-09 04:36:15,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:36:15,540 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 04:36:15,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:36:15,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 04:36:15,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2024-11-09 04:36:15,542 INFO L87 Difference]: Start difference. First operand 331 states and 353 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 14 states have call successors, (58), 2 states have call predecessors, (58), 1 states have return successors, (57), 13 states have call predecessors, (57), 13 states have call successors, (57) [2024-11-09 04:36:16,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:36:16,001 INFO L93 Difference]: Finished difference Result 359 states and 387 transitions. [2024-11-09 04:36:16,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 04:36:16,002 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 14 states have call successors, (58), 2 states have call predecessors, (58), 1 states have return successors, (57), 13 states have call predecessors, (57), 13 states have call successors, (57) Word has length 162 [2024-11-09 04:36:16,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:36:16,005 INFO L225 Difference]: With dead ends: 359 [2024-11-09 04:36:16,005 INFO L226 Difference]: Without dead ends: 301 [2024-11-09 04:36:16,006 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 463 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2024-11-09 04:36:16,007 INFO L432 NwaCegarLoop]: 81 mSDtfsCounter, 0 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:36:16,007 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 451 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:36:16,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2024-11-09 04:36:16,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2024-11-09 04:36:16,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 202 states have (on average 1.0594059405940595) internal successors, (214), 207 states have internal predecessors, (214), 54 states have call successors, (54), 44 states have call predecessors, (54), 44 states have return successors, (52), 49 states have call predecessors, (52), 52 states have call successors, (52) [2024-11-09 04:36:16,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 320 transitions. [2024-11-09 04:36:16,230 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 320 transitions. Word has length 162 [2024-11-09 04:36:16,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:36:16,231 INFO L471 AbstractCegarLoop]: Abstraction has 301 states and 320 transitions. [2024-11-09 04:36:16,231 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 14 states have call successors, (58), 2 states have call predecessors, (58), 1 states have return successors, (57), 13 states have call predecessors, (57), 13 states have call successors, (57) [2024-11-09 04:36:16,232 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 320 transitions. [2024-11-09 04:36:16,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2024-11-09 04:36:16,234 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:36:16,234 INFO L215 NwaCegarLoop]: trace histogram [27, 26, 26, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2024-11-09 04:36:16,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-09 04:36:16,435 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-09 04:36:16,436 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:36:16,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:36:16,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1682344824, now seen corresponding path program 5 times [2024-11-09 04:36:16,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:36:16,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960805500] [2024-11-09 04:36:16,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:36:16,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:36:16,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 04:36:16,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1081743522] [2024-11-09 04:36:16,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:36:16,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:36:16,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:36:16,559 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:36:16,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-09 04:36:16,744 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-11-09 04:36:16,745 INFO L228 tOrderPrioritization]: Conjunction of SSA is sat [2024-11-09 04:36:16,745 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-09 04:36:16,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 04:36:16,889 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2024-11-09 04:36:16,889 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-09 04:36:16,890 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-09 04:36:16,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-09 04:36:17,097 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:36:17,100 INFO L407 BasicCegarLoop]: Path program histogram: [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:36:17,180 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-09 04:36:17,184 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 04:36:17 BoogieIcfgContainer [2024-11-09 04:36:17,184 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-09 04:36:17,185 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-09 04:36:17,185 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-09 04:36:17,185 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-09 04:36:17,186 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:29:31" (3/4) ... [2024-11-09 04:36:17,187 INFO L136 WitnessPrinter]: Generating witness for reachability counterexample [2024-11-09 04:36:17,305 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/witness.graphml [2024-11-09 04:36:17,305 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-09 04:36:17,306 INFO L158 Benchmark]: Toolchain (without parser) took 406277.36ms. Allocated memory was 127.9MB in the beginning and 564.1MB in the end (delta: 436.2MB). Free memory was 90.7MB in the beginning and 431.4MB in the end (delta: -340.7MB). Peak memory consumption was 98.0MB. Max. memory is 16.1GB. [2024-11-09 04:36:17,306 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 127.9MB. Free memory is still 70.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 04:36:17,307 INFO L158 Benchmark]: CACSL2BoogieTranslator took 300.31ms. Allocated memory is still 127.9MB. Free memory was 90.3MB in the beginning and 77.6MB in the end (delta: 12.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-11-09 04:36:17,307 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.73ms. Allocated memory is still 127.9MB. Free memory was 77.6MB in the beginning and 75.9MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 04:36:17,307 INFO L158 Benchmark]: Boogie Preprocessor took 21.83ms. Allocated memory is still 127.9MB. Free memory was 75.9MB in the beginning and 74.7MB in the end (delta: 1.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-11-09 04:36:17,308 INFO L158 Benchmark]: RCFGBuilder took 426.03ms. Allocated memory is still 127.9MB. Free memory was 74.7MB in the beginning and 61.7MB in the end (delta: 12.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-11-09 04:36:17,308 INFO L158 Benchmark]: TraceAbstraction took 405362.90ms. Allocated memory was 127.9MB in the beginning and 564.1MB in the end (delta: 436.2MB). Free memory was 61.4MB in the beginning and 437.7MB in the end (delta: -376.4MB). Peak memory consumption was 62.4MB. Max. memory is 16.1GB. [2024-11-09 04:36:17,308 INFO L158 Benchmark]: Witness Printer took 120.92ms. Allocated memory is still 564.1MB. Free memory was 437.7MB in the beginning and 431.4MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2024-11-09 04:36:17,310 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 127.9MB. Free memory is still 70.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 300.31ms. Allocated memory is still 127.9MB. Free memory was 90.3MB in the beginning and 77.6MB in the end (delta: 12.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.73ms. Allocated memory is still 127.9MB. Free memory was 77.6MB in the beginning and 75.9MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 21.83ms. Allocated memory is still 127.9MB. Free memory was 75.9MB in the beginning and 74.7MB in the end (delta: 1.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 426.03ms. Allocated memory is still 127.9MB. Free memory was 74.7MB in the beginning and 61.7MB in the end (delta: 12.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 405362.90ms. Allocated memory was 127.9MB in the beginning and 564.1MB in the end (delta: 436.2MB). Free memory was 61.4MB in the beginning and 437.7MB in the end (delta: -376.4MB). Peak memory consumption was 62.4MB. Max. memory is 16.1GB. * Witness Printer took 120.92ms. Allocated memory is still 564.1MB. Free memory was 437.7MB in the beginning and 431.4MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; [L24] int A, B; [L25] int r, d, p, q; [L26] A = __VERIFIER_nondet_int() [L27] B = 1 [L29] r = A [L30] d = B [L31] p = 1 [L32] q = 0 VAL [A=24, B=1, counter=0, d=1, p=1, q=0, r=24] [L34] EXPR counter++ VAL [A=24, B=1, counter=1, d=1, p=1, q=0, r=24] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=1] [L35] RET __VERIFIER_assert(q == 0) VAL [A=24, B=1, counter=1, d=1, p=1, q=0, r=24] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=1] [L36] RET __VERIFIER_assert(r == A) VAL [A=24, B=1, counter=1, d=1, p=1, q=0, r=24] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=1] [L37] RET __VERIFIER_assert(d == B * p) VAL [A=24, B=1, counter=1, d=1, p=1, q=0, r=24] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [A=24, B=1, counter=1, d=2, p=2, q=0, r=24] [L34] EXPR counter++ VAL [A=24, B=1, counter=2, d=2, p=2, q=0, r=24] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=2] [L35] RET __VERIFIER_assert(q == 0) VAL [A=24, B=1, counter=2, d=2, p=2, q=0, r=24] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=2] [L36] RET __VERIFIER_assert(r == A) VAL [A=24, B=1, counter=2, d=2, p=2, q=0, r=24] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=2] [L37] RET __VERIFIER_assert(d == B * p) VAL [A=24, B=1, counter=2, d=2, p=2, q=0, r=24] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [A=24, B=1, counter=2, d=4, p=4, q=0, r=24] [L34] EXPR counter++ VAL [A=24, B=1, counter=3, d=4, p=4, q=0, r=24] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=3] [L35] RET __VERIFIER_assert(q == 0) VAL [A=24, B=1, counter=3, d=4, p=4, q=0, r=24] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=3] [L36] RET __VERIFIER_assert(r == A) VAL [A=24, B=1, counter=3, d=4, p=4, q=0, r=24] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=3] [L37] RET __VERIFIER_assert(d == B * p) VAL [A=24, B=1, counter=3, d=4, p=4, q=0, r=24] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [A=24, B=1, counter=3, d=8, p=8, q=0, r=24] [L34] EXPR counter++ VAL [A=24, B=1, counter=4, d=8, p=8, q=0, r=24] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=4] [L35] RET __VERIFIER_assert(q == 0) VAL [A=24, B=1, counter=4, d=8, p=8, q=0, r=24] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=4] [L36] RET __VERIFIER_assert(r == A) VAL [A=24, B=1, counter=4, d=8, p=8, q=0, r=24] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=4] [L37] RET __VERIFIER_assert(d == B * p) VAL [A=24, B=1, counter=4, d=8, p=8, q=0, r=24] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [A=24, B=1, counter=4, d=16, p=16, q=0, r=24] [L34] EXPR counter++ VAL [A=24, B=1, counter=5, d=16, p=16, q=0, r=24] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=5] [L35] RET __VERIFIER_assert(q == 0) VAL [A=24, B=1, counter=5, d=16, p=16, q=0, r=24] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=5] [L36] RET __VERIFIER_assert(r == A) VAL [A=24, B=1, counter=5, d=16, p=16, q=0, r=24] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=5] [L37] RET __VERIFIER_assert(d == B * p) VAL [A=24, B=1, counter=5, d=16, p=16, q=0, r=24] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [A=24, B=1, counter=5, d=32, p=32, q=0, r=24] [L34] EXPR counter++ VAL [A=24, B=1, counter=6, d=32, p=32, q=0, r=24] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=6] [L35] RET __VERIFIER_assert(q == 0) VAL [A=24, B=1, counter=6, d=32, p=32, q=0, r=24] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=6] [L36] RET __VERIFIER_assert(r == A) VAL [A=24, B=1, counter=6, d=32, p=32, q=0, r=24] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=6] [L37] RET __VERIFIER_assert(d == B * p) VAL [A=24, B=1, counter=6, d=32, p=32, q=0, r=24] [L38] COND TRUE !(r >= d) VAL [A=24, B=1, counter=6, d=32, p=32, q=0, r=24] [L44] EXPR counter++ VAL [A=24, B=1, counter=7, d=32, p=32, q=0, r=24] [L44] COND TRUE counter++<10 [L45] CALL __VERIFIER_assert(A == q*B + r) VAL [\old(cond)=1, counter=7] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=7] [L45] RET __VERIFIER_assert(A == q*B + r) VAL [A=24, B=1, counter=7, d=32, p=32, q=0, r=24] [L46] CALL __VERIFIER_assert(d == B*p) VAL [\old(cond)=1, counter=7] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=7] [L46] RET __VERIFIER_assert(d == B*p) VAL [A=24, B=1, counter=7, d=32, p=32, q=0, r=24] [L48] COND FALSE !(!(p != 1)) [L50] d = d / 2 [L51] p = p / 2 [L52] COND TRUE r >= d [L53] r = r - d [L54] q = q + p VAL [A=24, B=1, counter=7, d=16, p=16, q=16, r=8] [L44] EXPR counter++ VAL [A=24, B=1, counter=8, d=16, p=16, q=16, r=8] [L44] COND TRUE counter++<10 [L45] CALL __VERIFIER_assert(A == q*B + r) VAL [\old(cond)=1, counter=8] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=8] [L45] RET __VERIFIER_assert(A == q*B + r) VAL [A=24, B=1, counter=8, d=16, p=16, q=16, r=8] [L46] CALL __VERIFIER_assert(d == B*p) VAL [\old(cond)=1, counter=8] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=8] [L46] RET __VERIFIER_assert(d == B*p) VAL [A=24, B=1, counter=8, d=16, p=16, q=16, r=8] [L48] COND FALSE !(!(p != 1)) [L50] d = d / 2 [L51] p = p / 2 [L52] COND TRUE r >= d [L53] r = r - d [L54] q = q + p VAL [A=24, B=1, counter=8, d=8, p=8, q=24, r=0] [L44] EXPR counter++ VAL [A=24, B=1, counter=9, d=8, p=8, q=24, r=0] [L44] COND TRUE counter++<10 [L45] CALL __VERIFIER_assert(A == q*B + r) VAL [\old(cond)=1, counter=9] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=9] [L45] RET __VERIFIER_assert(A == q*B + r) VAL [A=24, B=1, counter=9, d=8, p=8, q=24, r=0] [L46] CALL __VERIFIER_assert(d == B*p) VAL [\old(cond)=1, counter=9] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=9] [L46] RET __VERIFIER_assert(d == B*p) VAL [A=24, B=1, counter=9, d=8, p=8, q=24, r=0] [L48] COND FALSE !(!(p != 1)) [L50] d = d / 2 [L51] p = p / 2 [L52] COND FALSE !(r >= d) VAL [A=24, B=1, counter=9, d=4, p=4, q=24, r=0] [L44] EXPR counter++ VAL [A=24, B=1, counter=10, d=4, p=4, q=24, r=0] [L44] COND TRUE counter++<10 [L45] CALL __VERIFIER_assert(A == q*B + r) VAL [\old(cond)=1, counter=10] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=10] [L45] RET __VERIFIER_assert(A == q*B + r) VAL [A=24, B=1, counter=10, d=4, p=4, q=24, r=0] [L46] CALL __VERIFIER_assert(d == B*p) VAL [\old(cond)=1, counter=10] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=10] [L46] RET __VERIFIER_assert(d == B*p) VAL [A=24, B=1, counter=10, d=4, p=4, q=24, r=0] [L48] COND FALSE !(!(p != 1)) [L50] d = d / 2 [L51] p = p / 2 [L52] COND FALSE !(r >= d) VAL [A=24, B=1, counter=10, d=2, p=2, q=24, r=0] [L44] EXPR counter++ VAL [A=24, B=1, counter=11, d=2, p=2, q=24, r=0] [L44] COND FALSE !(counter++<10) [L58] CALL __VERIFIER_assert(A == d*q + r) VAL [\old(cond)=0, counter=11] [L15] COND TRUE !(cond) VAL [\old(cond)=0, counter=11] [L17] reach_error() VAL [\old(cond)=0, counter=11] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 405.2s, OverallIterations: 24, TraceHistogramMax: 27, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 166.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3 mSolverCounterUnknown, 702 SdHoareTripleChecker+Valid, 32.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 652 mSDsluCounter, 4045 SdHoareTripleChecker+Invalid, 31.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3349 mSDsCounter, 509 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2902 IncrementalHoareTripleChecker+Invalid, 3414 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 509 mSolverCounterUnsat, 696 mSDtfsCounter, 2902 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3850 GetRequests, 3349 SyntacticMatches, 58 SemanticMatches, 443 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4153 ImplicationChecksByTransitivity, 216.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=391occurred in iteration=20, InterpolantAutomatonStates: 232, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.9s AutomataMinimizationTime, 23 MinimizatonAttempts, 268 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 187.4s InterpolantComputationTime, 3058 NumberOfCodeBlocks, 2983 NumberOfCodeBlocksAsserted, 74 NumberOfCheckSat, 3268 ConstructedInterpolants, 0 QuantifiedInterpolants, 18623 SizeOfPredicates, 48 NumberOfNonLiveVariables, 3456 ConjunctsInSsa, 388 ConjunctsInUnsatCore, 46 InterpolantComputations, 8 PerfectInterpolantSequences, 15363/17171 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 1.5s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 4, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 39, DAG_INTERPRETER_EARLY_EXITS: 2, TOOLS_POST_APPLICATIONS: 27, TOOLS_POST_TIME: 0.2s, TOOLS_POST_CALL_APPLICATIONS: 26, TOOLS_POST_CALL_TIME: 0.4s, TOOLS_POST_RETURN_APPLICATIONS: 16, TOOLS_POST_RETURN_TIME: 0.3s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 69, TOOLS_QUANTIFIERELIM_TIME: 0.9s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.0s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 92, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 34, DOMAIN_JOIN_TIME: 0.4s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 39, DOMAIN_ISBOTTOM_TIME: 0.1s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 16, CALL_SUMMARIZER_CACHE_MISSES: 2, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 408, DAG_COMPRESSION_RETAINED_NODES: 100, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2024-11-09 04:36:17,533 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2024-11-09 04:36:17,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd8cb85-b2ef-4a91-89b1-8b52ac287eb0/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE