./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX --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 68585835b92043bfb2f3c62590e96ff685993869f8a251aecd9fe4c8aaea0e1e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 01:00:46,248 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 01:00:46,369 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 01:00:46,380 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 01:00:46,381 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 01:00:46,431 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 01:00:46,435 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 01:00:46,436 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 01:00:46,437 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 01:00:46,443 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 01:00:46,443 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 01:00:46,445 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 01:00:46,445 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 01:00:46,447 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 01:00:46,448 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 01:00:46,448 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 01:00:46,449 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 01:00:46,449 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 01:00:46,450 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 01:00:46,450 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 01:00:46,452 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 01:00:46,453 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 01:00:46,454 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 01:00:46,455 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 01:00:46,455 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 01:00:46,455 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 01:00:46,456 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 01:00:46,456 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 01:00:46,457 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 01:00:46,457 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 01:00:46,459 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 01:00:46,459 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 01:00:46,459 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 01:00:46,460 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 01:00:46,460 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 01:00:46,460 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 01:00:46,461 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:00:46,461 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 01:00:46,461 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 01:00:46,461 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 01:00:46,462 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 01:00:46,462 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 01:00:46,462 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 01:00:46,463 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 01:00:46,463 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 01:00:46,463 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_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68585835b92043bfb2f3c62590e96ff685993869f8a251aecd9fe4c8aaea0e1e [2023-11-12 01:00:46,760 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 01:00:46,790 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 01:00:46,793 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 01:00:46,794 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 01:00:46,795 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 01:00:46,796 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i [2023-11-12 01:00:49,924 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 01:00:50,217 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 01:00:50,217 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i [2023-11-12 01:00:50,226 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/data/5fb2656cf/b36f431192fd4cc28bcaa70a9cc3c0ea/FLAGeab1480e0 [2023-11-12 01:00:50,250 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/data/5fb2656cf/b36f431192fd4cc28bcaa70a9cc3c0ea [2023-11-12 01:00:50,258 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 01:00:50,261 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 01:00:50,267 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 01:00:50,267 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 01:00:50,273 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 01:00:50,275 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:00:50" (1/1) ... [2023-11-12 01:00:50,277 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77d01274 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:50, skipping insertion in model container [2023-11-12 01:00:50,277 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:00:50" (1/1) ... [2023-11-12 01:00:50,312 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 01:00:50,487 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i[820,833] [2023-11-12 01:00:50,508 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:00:50,517 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 01:00:50,532 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i[820,833] [2023-11-12 01:00:50,542 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:00:50,557 INFO L206 MainTranslator]: Completed translation [2023-11-12 01:00:50,558 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:50 WrapperNode [2023-11-12 01:00:50,558 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 01:00:50,559 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 01:00:50,560 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 01:00:50,560 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 01:00:50,568 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:50" (1/1) ... [2023-11-12 01:00:50,576 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:50" (1/1) ... [2023-11-12 01:00:50,601 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2023-11-12 01:00:50,605 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 01:00:50,606 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 01:00:50,606 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 01:00:50,606 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 01:00:50,614 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:50" (1/1) ... [2023-11-12 01:00:50,614 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:50" (1/1) ... [2023-11-12 01:00:50,625 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:50" (1/1) ... [2023-11-12 01:00:50,626 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:50" (1/1) ... [2023-11-12 01:00:50,632 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:50" (1/1) ... [2023-11-12 01:00:50,635 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:50" (1/1) ... [2023-11-12 01:00:50,637 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:50" (1/1) ... [2023-11-12 01:00:50,638 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:50" (1/1) ... [2023-11-12 01:00:50,641 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 01:00:50,642 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 01:00:50,642 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 01:00:50,642 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 01:00:50,643 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:50" (1/1) ... [2023-11-12 01:00:50,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:00:50,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:50,691 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 01:00:50,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 01:00:50,747 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 01:00:50,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 01:00:50,747 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 01:00:50,748 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 01:00:50,748 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 01:00:50,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 01:00:50,750 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 01:00:50,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 01:00:50,845 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 01:00:50,847 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 01:00:51,090 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 01:00:51,152 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 01:00:51,152 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-12 01:00:51,155 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:00:51 BoogieIcfgContainer [2023-11-12 01:00:51,156 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 01:00:51,160 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 01:00:51,160 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 01:00:51,164 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 01:00:51,165 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 01:00:50" (1/3) ... [2023-11-12 01:00:51,166 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@491395d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:00:51, skipping insertion in model container [2023-11-12 01:00:51,166 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:50" (2/3) ... [2023-11-12 01:00:51,167 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@491395d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:00:51, skipping insertion in model container [2023-11-12 01:00:51,167 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:00:51" (3/3) ... [2023-11-12 01:00:51,169 INFO L112 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_ground-1.i [2023-11-12 01:00:51,193 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 01:00:51,193 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 01:00:51,253 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 01:00:51,262 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@e14a5f5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 01:00:51,263 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 01:00:51,268 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:00:51,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-12 01:00:51,276 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:51,277 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:00:51,278 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:51,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:51,286 INFO L85 PathProgramCache]: Analyzing trace with hash -267666341, now seen corresponding path program 1 times [2023-11-12 01:00:51,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:51,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980518506] [2023-11-12 01:00:51,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:51,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:51,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:51,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:00:51,682 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:51,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980518506] [2023-11-12 01:00:51,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980518506] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:00:51,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:00:51,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 01:00:51,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776402382] [2023-11-12 01:00:51,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:51,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:00:51,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:51,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:00:51,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:00:51,757 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:00:51,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:51,816 INFO L93 Difference]: Finished difference Result 21 states and 31 transitions. [2023-11-12 01:00:51,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:00:51,819 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-12 01:00:51,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:51,834 INFO L225 Difference]: With dead ends: 21 [2023-11-12 01:00:51,835 INFO L226 Difference]: Without dead ends: 11 [2023-11-12 01:00:51,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:00:51,848 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:51,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 01:00:51,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-11-12 01:00:51,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-11-12 01:00:51,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:00:51,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 15 transitions. [2023-11-12 01:00:51,891 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 15 transitions. Word has length 7 [2023-11-12 01:00:51,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:51,892 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 15 transitions. [2023-11-12 01:00:51,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:00:51,892 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 15 transitions. [2023-11-12 01:00:51,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-12 01:00:51,893 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:51,893 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:00:51,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 01:00:51,894 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:51,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:51,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1616020672, now seen corresponding path program 1 times [2023-11-12 01:00:51,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:51,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92958283] [2023-11-12 01:00:51,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:51,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:51,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:52,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:00:52,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:52,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92958283] [2023-11-12 01:00:52,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92958283] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:00:52,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465836256] [2023-11-12 01:00:52,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:52,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:52,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:52,028 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:00:52,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 01:00:52,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:52,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 01:00:52,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:00:52,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 01:00:52,176 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:00:52,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465836256] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:00:52,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:00:52,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-12 01:00:52,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642095404] [2023-11-12 01:00:52,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:52,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:00:52,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:52,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:00:52,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:00:52,181 INFO L87 Difference]: Start difference. First operand 11 states and 15 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:00:52,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:52,211 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2023-11-12 01:00:52,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:00:52,212 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-12 01:00:52,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:52,213 INFO L225 Difference]: With dead ends: 18 [2023-11-12 01:00:52,213 INFO L226 Difference]: Without dead ends: 12 [2023-11-12 01:00:52,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:00:52,216 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:52,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 01:00:52,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-11-12 01:00:52,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-11-12 01:00:52,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:00:52,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2023-11-12 01:00:52,222 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 8 [2023-11-12 01:00:52,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:52,223 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2023-11-12 01:00:52,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:00:52,223 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2023-11-12 01:00:52,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-12 01:00:52,224 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:52,224 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:00:52,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 01:00:52,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:52,432 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:52,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:52,433 INFO L85 PathProgramCache]: Analyzing trace with hash -670893389, now seen corresponding path program 1 times [2023-11-12 01:00:52,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:52,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466980280] [2023-11-12 01:00:52,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:52,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:52,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:52,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 01:00:52,581 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:52,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466980280] [2023-11-12 01:00:52,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466980280] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:00:52,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016002959] [2023-11-12 01:00:52,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:52,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:52,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:52,591 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:00:52,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 01:00:52,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:52,674 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 01:00:52,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:00:52,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 01:00:52,693 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:00:52,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016002959] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:00:52,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:00:52,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-12 01:00:52,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098444851] [2023-11-12 01:00:52,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:52,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:00:52,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:52,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:00:52,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:00:52,699 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:00:52,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:52,749 INFO L93 Difference]: Finished difference Result 21 states and 29 transitions. [2023-11-12 01:00:52,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:00:52,750 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-12 01:00:52,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:52,750 INFO L225 Difference]: With dead ends: 21 [2023-11-12 01:00:52,751 INFO L226 Difference]: Without dead ends: 13 [2023-11-12 01:00:52,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:00:52,754 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:52,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 01:00:52,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-11-12 01:00:52,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-11-12 01:00:52,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:00:52,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2023-11-12 01:00:52,765 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 10 [2023-11-12 01:00:52,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:52,766 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2023-11-12 01:00:52,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:00:52,767 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2023-11-12 01:00:52,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-12 01:00:52,768 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:52,768 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:00:52,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 01:00:52,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:52,982 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:52,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:52,983 INFO L85 PathProgramCache]: Analyzing trace with hash -918020549, now seen corresponding path program 1 times [2023-11-12 01:00:52,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:52,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359131479] [2023-11-12 01:00:52,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:52,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:52,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:53,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 01:00:53,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:53,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359131479] [2023-11-12 01:00:53,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359131479] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:00:53,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325557675] [2023-11-12 01:00:53,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:53,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:53,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:53,061 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:00:53,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 01:00:53,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:53,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 01:00:53,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:00:53,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 01:00:53,173 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:00:53,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 01:00:53,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325557675] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:00:53,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [379183548] [2023-11-12 01:00:53,221 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-12 01:00:53,221 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:00:53,226 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:00:53,232 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:00:53,233 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:00:53,864 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:00:54,035 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '290#(and (<= (+ |ULTIMATE.start_main_#t~mem10#1| 1) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~y~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| 4)) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) |ULTIMATE.start_main_~#a~0#1.offset|)) (= |ULTIMATE.start_main_~swapped~0#1| 0))' at error location [2023-11-12 01:00:54,037 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:00:54,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:00:54,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-12 01:00:54,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963899515] [2023-11-12 01:00:54,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:00:54,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 01:00:54,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:54,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 01:00:54,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-11-12 01:00:54,044 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:00:54,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:54,098 INFO L93 Difference]: Finished difference Result 26 states and 36 transitions. [2023-11-12 01:00:54,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 01:00:54,099 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-12 01:00:54,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:54,100 INFO L225 Difference]: With dead ends: 26 [2023-11-12 01:00:54,100 INFO L226 Difference]: Without dead ends: 16 [2023-11-12 01:00:54,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-11-12 01:00:54,106 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:54,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 01:00:54,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-12 01:00:54,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-11-12 01:00:54,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:00:54,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2023-11-12 01:00:54,118 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 11 [2023-11-12 01:00:54,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:54,118 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2023-11-12 01:00:54,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:00:54,119 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2023-11-12 01:00:54,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-12 01:00:54,120 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:54,120 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:00:54,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 01:00:54,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:54,328 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:54,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:54,328 INFO L85 PathProgramCache]: Analyzing trace with hash -741414400, now seen corresponding path program 2 times [2023-11-12 01:00:54,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:54,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249236328] [2023-11-12 01:00:54,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:54,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:54,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:54,432 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 01:00:54,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:54,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249236328] [2023-11-12 01:00:54,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249236328] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:00:54,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630196056] [2023-11-12 01:00:54,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 01:00:54,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:54,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:54,435 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:00:54,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 01:00:54,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 01:00:54,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:00:54,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 01:00:54,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:00:54,615 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 01:00:54,616 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:00:54,709 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 01:00:54,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630196056] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:00:54,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1853009523] [2023-11-12 01:00:54,721 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-12 01:00:54,722 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:00:54,722 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:00:54,722 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:00:54,723 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:00:55,105 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:00:55,399 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '457#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (<= (+ |ULTIMATE.start_main_#t~mem10#1| 1) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~y~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) |ULTIMATE.start_main_#t~mem10#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_~swapped~0#1| 0))' at error location [2023-11-12 01:00:55,400 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:00:55,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:00:55,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-11-12 01:00:55,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432730066] [2023-11-12 01:00:55,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:00:55,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-12 01:00:55,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:55,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-12 01:00:55,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2023-11-12 01:00:55,407 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:00:55,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:55,471 INFO L93 Difference]: Finished difference Result 33 states and 47 transitions. [2023-11-12 01:00:55,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 01:00:55,472 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-12 01:00:55,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:55,473 INFO L225 Difference]: With dead ends: 33 [2023-11-12 01:00:55,473 INFO L226 Difference]: Without dead ends: 23 [2023-11-12 01:00:55,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2023-11-12 01:00:55,477 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:55,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 01:00:55,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-12 01:00:55,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-12 01:00:55,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:00:55,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-11-12 01:00:55,488 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 14 [2023-11-12 01:00:55,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:55,489 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-11-12 01:00:55,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:00:55,489 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-11-12 01:00:55,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-12 01:00:55,490 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:55,491 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:00:55,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 01:00:55,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:55,699 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:55,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:55,699 INFO L85 PathProgramCache]: Analyzing trace with hash -2020485522, now seen corresponding path program 3 times [2023-11-12 01:00:55,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:55,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977684056] [2023-11-12 01:00:55,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:55,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:55,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:55,864 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-12 01:00:55,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:55,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977684056] [2023-11-12 01:00:55,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977684056] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:00:55,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144708707] [2023-11-12 01:00:55,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 01:00:55,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:55,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:55,867 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:00:55,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 01:00:55,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 01:00:55,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:00:55,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 01:00:55,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:00:56,171 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 01:00:56,171 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:00:56,527 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 01:00:56,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144708707] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:00:56,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [82035724] [2023-11-12 01:00:56,530 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-12 01:00:56,530 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:00:56,531 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:00:56,531 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:00:56,531 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:00:56,791 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:00:56,976 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '709#(and (<= (+ |ULTIMATE.start_main_#t~mem10#1| 1) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~y~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| 4)) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) |ULTIMATE.start_main_~#a~0#1.offset|)) (= |ULTIMATE.start_main_~swapped~0#1| 0))' at error location [2023-11-12 01:00:56,976 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:00:56,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:00:56,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 12, 12] total 27 [2023-11-12 01:00:56,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241039649] [2023-11-12 01:00:56,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:00:56,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-12 01:00:56,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:56,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-12 01:00:56,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2023-11-12 01:00:56,979 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:00:57,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:57,074 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2023-11-12 01:00:57,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-12 01:00:57,075 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-12 01:00:57,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:57,080 INFO L225 Difference]: With dead ends: 47 [2023-11-12 01:00:57,081 INFO L226 Difference]: Without dead ends: 36 [2023-11-12 01:00:57,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2023-11-12 01:00:57,083 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:57,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:00:57,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-12 01:00:57,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-11-12 01:00:57,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:00:57,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2023-11-12 01:00:57,105 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 21 [2023-11-12 01:00:57,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:57,105 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2023-11-12 01:00:57,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:00:57,105 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2023-11-12 01:00:57,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-12 01:00:57,107 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:57,107 INFO L195 NwaCegarLoop]: trace histogram [22, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:00:57,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 01:00:57,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:57,314 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:57,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:57,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1928949280, now seen corresponding path program 4 times [2023-11-12 01:00:57,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:57,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000850490] [2023-11-12 01:00:57,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:57,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:57,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:58,100 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-12 01:00:58,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:58,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000850490] [2023-11-12 01:00:58,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000850490] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:00:58,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237059604] [2023-11-12 01:00:58,101 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 01:00:58,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:58,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:58,106 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:00:58,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 01:00:58,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:58,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-12 01:00:58,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:00:58,342 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-12 01:00:58,342 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:00:59,436 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-12 01:00:59,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237059604] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:00:59,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1807154560] [2023-11-12 01:00:59,439 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-12 01:00:59,439 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:00:59,440 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:00:59,440 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:00:59,440 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:00:59,677 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:00:59,897 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1113#(and (<= (+ |ULTIMATE.start_main_#t~mem10#1| 1) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~y~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| 4)) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) |ULTIMATE.start_main_~#a~0#1.offset|)) (= |ULTIMATE.start_main_~swapped~0#1| 0))' at error location [2023-11-12 01:00:59,897 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:00:59,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:00:59,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2023-11-12 01:00:59,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033466486] [2023-11-12 01:00:59,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:00:59,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-12 01:00:59,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:59,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-12 01:00:59,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1192, Invalid=1670, Unknown=0, NotChecked=0, Total=2862 [2023-11-12 01:00:59,903 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 49 states, 49 states have (on average 1.183673469387755) internal successors, (58), 48 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:01:00,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:00,055 INFO L93 Difference]: Finished difference Result 72 states and 103 transitions. [2023-11-12 01:01:00,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-12 01:01:00,056 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.183673469387755) internal successors, (58), 48 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-11-12 01:01:00,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:00,057 INFO L225 Difference]: With dead ends: 72 [2023-11-12 01:01:00,057 INFO L226 Difference]: Without dead ends: 60 [2023-11-12 01:01:00,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1192, Invalid=1670, Unknown=0, NotChecked=0, Total=2862 [2023-11-12 01:01:00,060 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:00,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:01:00,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-12 01:01:00,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-11-12 01:01:00,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 59 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:01:00,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2023-11-12 01:01:00,073 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 34 [2023-11-12 01:01:00,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:00,073 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2023-11-12 01:01:00,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.183673469387755) internal successors, (58), 48 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:01:00,074 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2023-11-12 01:01:00,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-12 01:01:00,076 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:00,077 INFO L195 NwaCegarLoop]: trace histogram [46, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:00,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 01:01:00,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:00,289 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:00,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:00,290 INFO L85 PathProgramCache]: Analyzing trace with hash 592295584, now seen corresponding path program 5 times [2023-11-12 01:01:00,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:00,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993724184] [2023-11-12 01:01:00,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:00,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:00,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:02,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-12 01:01:02,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:02,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993724184] [2023-11-12 01:01:02,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993724184] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:01:02,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297451903] [2023-11-12 01:01:02,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 01:01:02,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:02,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:01:02,783 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:01:02,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 01:01:02,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-12 01:01:02,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:01:02,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 01:01:02,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:01:03,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2023-11-12 01:01:03,113 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:01:03,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2023-11-12 01:01:03,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297451903] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:01:03,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [121843842] [2023-11-12 01:01:03,295 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-12 01:01:03,296 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:01:03,296 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:01:03,296 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:01:03,296 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:01:03,497 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:01:03,990 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1767#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (<= (+ |ULTIMATE.start_main_#t~mem10#1| 1) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~y~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) |ULTIMATE.start_main_#t~mem10#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_~swapped~0#1| 0))' at error location [2023-11-12 01:01:03,990 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:01:03,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:01:03,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 6, 6] total 57 [2023-11-12 01:01:03,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704496106] [2023-11-12 01:01:03,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:01:03,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-11-12 01:01:03,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:03,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-11-12 01:01:03,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1245, Invalid=2787, Unknown=0, NotChecked=0, Total=4032 [2023-11-12 01:01:03,997 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 57 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 57 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:01:04,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:04,161 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2023-11-12 01:01:04,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-11-12 01:01:04,161 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 57 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2023-11-12 01:01:04,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:04,163 INFO L225 Difference]: With dead ends: 78 [2023-11-12 01:01:04,163 INFO L226 Difference]: Without dead ends: 66 [2023-11-12 01:01:04,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1245, Invalid=2787, Unknown=0, NotChecked=0, Total=4032 [2023-11-12 01:01:04,166 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:04,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 57 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:01:04,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-12 01:01:04,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2023-11-12 01:01:04,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:01:04,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2023-11-12 01:01:04,177 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 58 [2023-11-12 01:01:04,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:04,178 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2023-11-12 01:01:04,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 57 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:01:04,178 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2023-11-12 01:01:04,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-12 01:01:04,180 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:04,180 INFO L195 NwaCegarLoop]: trace histogram [47, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:04,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 01:01:04,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:04,385 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:04,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:04,386 INFO L85 PathProgramCache]: Analyzing trace with hash 63322195, now seen corresponding path program 6 times [2023-11-12 01:01:04,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:04,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707278719] [2023-11-12 01:01:04,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:04,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:04,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:07,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1165 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-12 01:01:07,284 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:07,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707278719] [2023-11-12 01:01:07,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707278719] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:01:07,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247760656] [2023-11-12 01:01:07,306 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 01:01:07,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:07,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:01:07,309 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:01:07,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 01:01:07,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 01:01:07,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:01:07,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-12 01:01:07,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:01:07,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1165 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-12 01:01:07,725 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:01:11,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1165 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-12 01:01:11,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247760656] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:01:11,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [886659562] [2023-11-12 01:01:11,466 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-12 01:01:11,466 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:01:11,466 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:01:11,467 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:01:11,467 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:01:11,690 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:01:12,085 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2525#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (<= (+ |ULTIMATE.start_main_#t~mem10#1| 1) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~y~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) |ULTIMATE.start_main_#t~mem10#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_~swapped~0#1| 0))' at error location [2023-11-12 01:01:12,085 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:01:12,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:01:12,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 98 [2023-11-12 01:01:12,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646962156] [2023-11-12 01:01:12,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:01:12,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2023-11-12 01:01:12,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:12,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2023-11-12 01:01:12,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4876, Invalid=6254, Unknown=0, NotChecked=0, Total=11130 [2023-11-12 01:01:12,100 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 99 states, 99 states have (on average 1.0909090909090908) internal successors, (108), 98 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:01:12,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:12,334 INFO L93 Difference]: Finished difference Result 132 states and 188 transitions. [2023-11-12 01:01:12,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2023-11-12 01:01:12,335 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.0909090909090908) internal successors, (108), 98 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2023-11-12 01:01:12,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:12,336 INFO L225 Difference]: With dead ends: 132 [2023-11-12 01:01:12,337 INFO L226 Difference]: Without dead ends: 115 [2023-11-12 01:01:12,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=4876, Invalid=6254, Unknown=0, NotChecked=0, Total=11130 [2023-11-12 01:01:12,342 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:12,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:01:12,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-11-12 01:01:12,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2023-11-12 01:01:12,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.043859649122807) internal successors, (119), 114 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:01:12,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 119 transitions. [2023-11-12 01:01:12,357 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 119 transitions. Word has length 64 [2023-11-12 01:01:12,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:12,357 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 119 transitions. [2023-11-12 01:01:12,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.0909090909090908) internal successors, (108), 98 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:01:12,358 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 119 transitions. [2023-11-12 01:01:12,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-12 01:01:12,360 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:12,360 INFO L195 NwaCegarLoop]: trace histogram [96, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:12,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 01:01:12,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:12,568 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:12,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:12,569 INFO L85 PathProgramCache]: Analyzing trace with hash 426424334, now seen corresponding path program 7 times [2023-11-12 01:01:12,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:12,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497928720] [2023-11-12 01:01:12,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:12,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:12,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:20,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4693 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-12 01:01:20,331 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:20,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497928720] [2023-11-12 01:01:20,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497928720] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:01:20,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192159059] [2023-11-12 01:01:20,331 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 01:01:20,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:20,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:01:20,333 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:01:20,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 01:01:20,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:20,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 995 conjuncts, 98 conjunts are in the unsatisfiable core [2023-11-12 01:01:20,732 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:01:20,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4693 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-12 01:01:20,996 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:01:32,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4693 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-12 01:01:32,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192159059] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:01:32,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1037452451] [2023-11-12 01:01:32,979 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-12 01:01:32,980 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:01:32,980 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:01:32,980 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:01:32,980 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:01:33,191 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:01:33,598 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3881#(and (<= (+ |ULTIMATE.start_main_#t~mem10#1| 1) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~y~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| 4)) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) |ULTIMATE.start_main_~#a~0#1.offset|)) (= |ULTIMATE.start_main_~swapped~0#1| 0))' at error location [2023-11-12 01:01:33,598 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:01:33,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:01:33,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98, 98] total 196 [2023-11-12 01:01:33,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702662506] [2023-11-12 01:01:33,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:01:33,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 197 states [2023-11-12 01:01:33,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:33,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2023-11-12 01:01:33,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19322, Invalid=21280, Unknown=0, NotChecked=0, Total=40602 [2023-11-12 01:01:33,616 INFO L87 Difference]: Start difference. First operand 115 states and 119 transitions. Second operand has 197 states, 197 states have (on average 1.0456852791878173) internal successors, (206), 196 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:01:34,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:34,235 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2023-11-12 01:01:34,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2023-11-12 01:01:34,236 INFO L78 Accepts]: Start accepts. Automaton has has 197 states, 197 states have (on average 1.0456852791878173) internal successors, (206), 196 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2023-11-12 01:01:34,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:34,239 INFO L225 Difference]: With dead ends: 230 [2023-11-12 01:01:34,239 INFO L226 Difference]: Without dead ends: 213 [2023-11-12 01:01:34,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1839 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=19322, Invalid=21280, Unknown=0, NotChecked=0, Total=40602 [2023-11-12 01:01:34,244 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:34,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:01:34,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-11-12 01:01:34,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2023-11-12 01:01:34,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.0235849056603774) internal successors, (217), 212 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:01:34,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 217 transitions. [2023-11-12 01:01:34,265 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 217 transitions. Word has length 113 [2023-11-12 01:01:34,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:34,266 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 217 transitions. [2023-11-12 01:01:34,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 197 states, 197 states have (on average 1.0456852791878173) internal successors, (206), 196 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:01:34,266 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 217 transitions. [2023-11-12 01:01:34,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2023-11-12 01:01:34,270 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:34,271 INFO L195 NwaCegarLoop]: trace histogram [194, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:34,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 01:01:34,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ad0989-460d-4cf0-b21b-6ec5f7870fb1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:34,479 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:34,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:34,479 INFO L85 PathProgramCache]: Analyzing trace with hash 552594094, now seen corresponding path program 8 times [2023-11-12 01:01:34,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:34,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068061225] [2023-11-12 01:01:34,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:34,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:34,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat