./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_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_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/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_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/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_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/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 4c9c46abbea18888bba6501dfe6c704a11e8fe399c985999e1e07c66bb12b728 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:46:14,259 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:46:14,377 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:46:14,389 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:46:14,390 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:46:14,427 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:46:14,428 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:46:14,429 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:46:14,430 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:46:14,435 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:46:14,436 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:46:14,436 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:46:14,437 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:46:14,439 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:46:14,439 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:46:14,440 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:46:14,440 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:46:14,441 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:46:14,441 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:46:14,442 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:46:14,442 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:46:14,443 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:46:14,444 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:46:14,445 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:46:14,445 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:46:14,446 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:46:14,446 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:46:14,447 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:46:14,447 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:46:14,448 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:46:14,449 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:46:14,449 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:46:14,450 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:46:14,450 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:46:14,451 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:46:14,451 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:46:14,451 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:46:14,452 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:46:14,452 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:46:14,452 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:46:14,453 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:46:14,453 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:46:14,453 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:46:14,454 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:46:14,454 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:46:14,455 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_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4c9c46abbea18888bba6501dfe6c704a11e8fe399c985999e1e07c66bb12b728 [2023-11-12 00:46:14,815 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:46:14,846 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:46:14,849 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:46:14,852 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:46:14,852 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:46:14,856 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i [2023-11-12 00:46:17,983 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:46:18,181 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:46:18,182 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i [2023-11-12 00:46:18,191 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/data/c0da08c5c/e25304d3be1a4e53aad52ba4ddfbee06/FLAG073b50589 [2023-11-12 00:46:18,208 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/data/c0da08c5c/e25304d3be1a4e53aad52ba4ddfbee06 [2023-11-12 00:46:18,214 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:46:18,216 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:46:18,219 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:46:18,219 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:46:18,225 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:46:18,226 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:46:18" (1/1) ... [2023-11-12 00:46:18,227 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4569fb9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:18, skipping insertion in model container [2023-11-12 00:46:18,227 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:46:18" (1/1) ... [2023-11-12 00:46:18,254 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:46:18,442 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_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i[832,845] [2023-11-12 00:46:18,469 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:46:18,480 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:46:18,499 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_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i[832,845] [2023-11-12 00:46:18,512 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:46:18,528 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:46:18,529 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:18 WrapperNode [2023-11-12 00:46:18,529 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:46:18,530 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:46:18,531 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:46:18,531 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:46:18,539 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:18" (1/1) ... [2023-11-12 00:46:18,548 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:18" (1/1) ... [2023-11-12 00:46:18,574 INFO L138 Inliner]: procedures = 18, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 138 [2023-11-12 00:46:18,574 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:46:18,575 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:46:18,575 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:46:18,575 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:46:18,586 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:18" (1/1) ... [2023-11-12 00:46:18,586 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:18" (1/1) ... [2023-11-12 00:46:18,589 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:18" (1/1) ... [2023-11-12 00:46:18,589 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:18" (1/1) ... [2023-11-12 00:46:18,596 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:18" (1/1) ... [2023-11-12 00:46:18,601 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:18" (1/1) ... [2023-11-12 00:46:18,603 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:18" (1/1) ... [2023-11-12 00:46:18,604 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:18" (1/1) ... [2023-11-12 00:46:18,607 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:46:18,608 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:46:18,608 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:46:18,608 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:46:18,609 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:18" (1/1) ... [2023-11-12 00:46:18,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:46:18,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:46:18,646 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:46:18,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:46:18,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:46:18,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:46:18,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:46:18,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:46:18,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:46:18,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:46:18,714 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:46:18,715 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-12 00:46:18,715 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-12 00:46:18,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:46:18,832 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:46:18,835 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:46:19,102 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:46:19,228 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:46:19,228 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-11-12 00:46:19,231 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:46:19 BoogieIcfgContainer [2023-11-12 00:46:19,231 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:46:19,234 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:46:19,234 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:46:19,238 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:46:19,238 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:46:18" (1/3) ... [2023-11-12 00:46:19,239 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54952b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:46:19, skipping insertion in model container [2023-11-12 00:46:19,239 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:18" (2/3) ... [2023-11-12 00:46:19,240 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54952b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:46:19, skipping insertion in model container [2023-11-12 00:46:19,240 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:46:19" (3/3) ... [2023-11-12 00:46:19,242 INFO L112 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_ground-1.i [2023-11-12 00:46:19,264 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:46:19,264 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:46:19,314 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:46:19,346 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;@e70b196, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:46:19,347 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:46:19,352 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:46:19,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-12 00:46:19,360 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:19,361 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:46:19,362 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:19,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:19,371 INFO L85 PathProgramCache]: Analyzing trace with hash -917584139, now seen corresponding path program 1 times [2023-11-12 00:46:19,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:19,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480178165] [2023-11-12 00:46:19,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:19,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:19,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:19,683 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 00:46:19,683 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:19,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480178165] [2023-11-12 00:46:19,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480178165] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:46:19,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:46:19,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:46:19,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499546470] [2023-11-12 00:46:19,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:46:19,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:46:19,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:19,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:46:19,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:46:19,727 INFO L87 Difference]: Start difference. First operand has 22 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:19,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:19,830 INFO L93 Difference]: Finished difference Result 56 states and 90 transitions. [2023-11-12 00:46:19,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:46:19,832 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-12 00:46:19,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:19,840 INFO L225 Difference]: With dead ends: 56 [2023-11-12 00:46:19,840 INFO L226 Difference]: Without dead ends: 35 [2023-11-12 00:46:19,843 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 00:46:19,847 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 15 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:19,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 25 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:46:19,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-12 00:46:19,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2023-11-12 00:46:19,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:46:19,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2023-11-12 00:46:19,890 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 8 [2023-11-12 00:46:19,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:19,891 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2023-11-12 00:46:19,891 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:19,891 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2023-11-12 00:46:19,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-12 00:46:19,894 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:19,894 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:46:19,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:46:19,895 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:19,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:19,896 INFO L85 PathProgramCache]: Analyzing trace with hash -159922450, now seen corresponding path program 1 times [2023-11-12 00:46:19,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:19,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515278495] [2023-11-12 00:46:19,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:19,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:19,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:19,983 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 00:46:19,983 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:19,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515278495] [2023-11-12 00:46:19,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515278495] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:46:19,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607499381] [2023-11-12 00:46:19,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:19,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:19,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:46:19,992 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:46:20,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:46:20,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:20,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:46:20,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:46:20,136 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 00:46:20,144 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:46:20,183 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 00:46:20,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607499381] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:46:20,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [455246342] [2023-11-12 00:46:20,204 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-12 00:46:20,204 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:46:20,208 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:46:20,214 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:46:20,215 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:46:20,598 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:46:20,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [455246342] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:46:20,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:46:20,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 3] total 8 [2023-11-12 00:46:20,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865973733] [2023-11-12 00:46:20,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:46:20,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:46:20,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:20,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:46:20,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:46:20,669 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:20,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:20,749 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2023-11-12 00:46:20,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:46:20,750 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-12 00:46:20,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:20,752 INFO L225 Difference]: With dead ends: 43 [2023-11-12 00:46:20,752 INFO L226 Difference]: Without dead ends: 23 [2023-11-12 00:46:20,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:46:20,755 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 8 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:20,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 29 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:46:20,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-12 00:46:20,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2023-11-12 00:46:20,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:46:20,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2023-11-12 00:46:20,770 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 9 [2023-11-12 00:46:20,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:20,770 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2023-11-12 00:46:20,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:20,771 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2023-11-12 00:46:20,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-12 00:46:20,772 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:20,772 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:46:20,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 00:46:20,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-12 00:46:20,980 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:20,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:20,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1749480658, now seen corresponding path program 1 times [2023-11-12 00:46:20,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:20,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293362692] [2023-11-12 00:46:20,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:20,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:21,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:21,157 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 00:46:21,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:21,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293362692] [2023-11-12 00:46:21,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293362692] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:46:21,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429375973] [2023-11-12 00:46:21,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:21,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:21,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:46:21,177 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:46:21,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:46:21,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:21,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:46:21,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:46:21,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:46:21,293 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:46:21,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429375973] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:46:21,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:46:21,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-12 00:46:21,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938611018] [2023-11-12 00:46:21,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:46:21,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:46:21,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:21,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:46:21,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:46:21,297 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:21,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:21,350 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2023-11-12 00:46:21,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:46:21,351 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-12 00:46:21,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:21,354 INFO L225 Difference]: With dead ends: 39 [2023-11-12 00:46:21,354 INFO L226 Difference]: Without dead ends: 24 [2023-11-12 00:46:21,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 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 00:46:21,359 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 5 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:21,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 22 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:46:21,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-12 00:46:21,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2023-11-12 00:46:21,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:46:21,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2023-11-12 00:46:21,371 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 15 [2023-11-12 00:46:21,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:21,373 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2023-11-12 00:46:21,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:21,375 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2023-11-12 00:46:21,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-12 00:46:21,376 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:21,377 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:46:21,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:46:21,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:21,582 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:21,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:21,583 INFO L85 PathProgramCache]: Analyzing trace with hash 664213273, now seen corresponding path program 1 times [2023-11-12 00:46:21,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:21,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720200993] [2023-11-12 00:46:21,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:21,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:21,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:21,656 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 00:46:21,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:21,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720200993] [2023-11-12 00:46:21,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720200993] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:46:21,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183100931] [2023-11-12 00:46:21,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:21,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:21,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:46:21,659 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:46:21,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:46:21,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:21,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:46:21,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:46:21,772 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 00:46:21,772 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:46:21,790 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 00:46:21,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183100931] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:46:21,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2004208150] [2023-11-12 00:46:21,793 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-11-12 00:46:21,793 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:46:21,794 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:46:21,794 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:46:21,794 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:46:22,324 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:46:22,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [2004208150] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:46:22,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:46:22,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3, 3] total 12 [2023-11-12 00:46:22,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236961266] [2023-11-12 00:46:22,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:46:22,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 00:46:22,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:22,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 00:46:22,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2023-11-12 00:46:22,734 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:23,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:23,207 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2023-11-12 00:46:23,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 00:46:23,208 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-12 00:46:23,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:23,209 INFO L225 Difference]: With dead ends: 41 [2023-11-12 00:46:23,209 INFO L226 Difference]: Without dead ends: 27 [2023-11-12 00:46:23,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=103, Invalid=137, Unknown=0, NotChecked=0, Total=240 [2023-11-12 00:46:23,211 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 6 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:23,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 37 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:46:23,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-12 00:46:23,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2023-11-12 00:46:23,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:46:23,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2023-11-12 00:46:23,229 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 16 [2023-11-12 00:46:23,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:23,230 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2023-11-12 00:46:23,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:23,230 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2023-11-12 00:46:23,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 00:46:23,232 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:23,232 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:46:23,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:46:23,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:23,438 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:23,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:23,439 INFO L85 PathProgramCache]: Analyzing trace with hash -2073541518, now seen corresponding path program 1 times [2023-11-12 00:46:23,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:23,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611662938] [2023-11-12 00:46:23,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:23,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:23,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:23,534 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 00:46:23,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:23,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611662938] [2023-11-12 00:46:23,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611662938] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:46:23,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261160292] [2023-11-12 00:46:23,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:23,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:23,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:46:23,537 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:46:23,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:46:23,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:23,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:46:23,640 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:46:23,655 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 00:46:23,655 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:46:23,673 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 00:46:23,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261160292] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:46:23,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1965352028] [2023-11-12 00:46:23,678 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-12 00:46:23,678 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:46:23,679 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:46:23,680 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:46:23,680 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:46:24,782 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 109 for LOIs [2023-11-12 00:46:24,915 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:46:25,899 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_elem_exists_~i~0#1_29| Int) (|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_insert_~size#1_25| Int) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_insert_~set#1.base_25| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_19| Int) (|v_ULTIMATE.start_main_#t~ret15#1_32| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_24| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_insert_#in~value#1_24| Int) (|v_ULTIMATE.start_elem_exists_~size#1_22| Int) (|v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_1| Int) (|v_#memory_int_63| (Array Int (Array Int Int))) (|v_ULTIMATE.start_insert_#in~set#1.offset_24| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_elem_exists_~value#1_22| Int) (|v_ULTIMATE.start_insert_~value#1_25| Int) (|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~n~0#1_52| Int) (|v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_#t~mem14#1_34| Int) (|v_ULTIMATE.start_insert_~set#1.offset_25| Int) (|v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_19| Int) (|v_ULTIMATE.start_insert_#in~size#1_24| Int) (|v_ULTIMATE.start_insert_#res#1_23| Int)) (let ((.cse3 (= |v_ULTIMATE.start_elem_exists_~i~0#1_29| 0)) (.cse4 (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_1| 0))) (let ((.cse5 (<= 1 |v_ULTIMATE.start_elem_exists_~size#1_22|)) (.cse2 (and .cse3 (<= |v_ULTIMATE.start_elem_exists_~size#1_22| 0) .cse4))) (and (let ((.cse0 (let ((.cse1 (select |c_#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_1|))) (= (select .cse1 (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_1| 4)) (select .cse1 |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_1|))))) (or (and .cse0 (= |c___VERIFIER_assert_#in~cond| 0)) (and (not .cse0) (= |c___VERIFIER_assert_#in~cond| 1)))) (<= 0 (+ |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_1| 2147483648)) (or .cse2 (and .cse3 .cse4 .cse5 (= |v_ULTIMATE.start_elem_exists_~value#1_22| (select (select |v_#memory_int_63| |v_ULTIMATE.start_elem_exists_~set#1.base_19|) |v_ULTIMATE.start_elem_exists_~set#1.offset_19|)))) (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_1|) (or (and (= |v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_1| |v_ULTIMATE.start_insert_#in~value#1_24|) (= |v_ULTIMATE.start_insert_~value#1_25| |v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_1|) (= |v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_1| |v_ULTIMATE.start_insert_~size#1_25|) (= |v_#memory_int_63| |c_#memory_int|) (= |v_ULTIMATE.start_insert_#in~set#1.base_24| |v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_1|) (= |v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_1| |v_ULTIMATE.start_insert_~set#1.offset_25|) (= |v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_1| |v_ULTIMATE.start_insert_#in~size#1_24|) (= |v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_1| |v_ULTIMATE.start_insert_~set#1.base_25|) (= |v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_1| |v_ULTIMATE.start_insert_#in~set#1.offset_24|) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_1| |v_ULTIMATE.start_insert_#res#1_23|) (= |v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_1| |v_ULTIMATE.start_main_#t~ret15#1_32|) (not .cse4) (= |v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_1| |v_ULTIMATE.start_main_#t~mem14#1_34|) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_1| |v_ULTIMATE.start_main_~n~0#1_52|)) (and (<= 0 (+ |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_1| 2147483648)) (= |c_#memory_int| (store |v_#memory_int_63| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_1| (store (select |v_#memory_int_63| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_1|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_1| (* |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_1| 4) (- 4)) (select (select |v_#memory_int_63| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_1|) (+ (- 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_1| (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_1| 4)))))) (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_1| 2147483647) .cse4 (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_1| (+ |v_ULTIMATE.start_main_~n~0#1_52| 1)) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_1| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_1|))) (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_1|) (<= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_1| 2147483647) (or (and .cse3 .cse4 .cse5) .cse2))))) is different from true [2023-11-12 00:46:26,118 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '774#(and (exists ((|v_#memory_int_63| (Array Int (Array Int Int))) (|v_ULTIMATE.start_elem_exists_~i~0#1_29| Int) (|v_ULTIMATE.start_elem_exists_~value#1_22| Int) (|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~n~0#1_52| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_19| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_19| Int) (|v_ULTIMATE.start_elem_exists_~size#1_22| Int)) (and (= |#memory_int| (store |v_#memory_int_63| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_1| (store (select |v_#memory_int_63| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_1|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_1| (* |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_1| 4) (- 4)) (select (select |v_#memory_int_63| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_1|) (+ (- 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_1| (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_1| 4)))))) (= |v_ULTIMATE.start_elem_exists_~i~0#1_29| 0) (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_1| 2147483647) (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_1| 0) (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_1|) (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_1|) |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_1|) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_1|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_1| 4))) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_1| (+ |v_ULTIMATE.start_main_~n~0#1_52| 1)) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_1| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_1|) (or (< |v_ULTIMATE.start_elem_exists_~size#1_22| 1) (= |v_ULTIMATE.start_elem_exists_~value#1_22| (select (select |v_#memory_int_63| |v_ULTIMATE.start_elem_exists_~set#1.base_19|) |v_ULTIMATE.start_elem_exists_~set#1.offset_19|))) (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_1|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-12 00:46:26,118 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:46:26,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:46:26,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-12 00:46:26,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512577059] [2023-11-12 00:46:26,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:46:26,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:46:26,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:26,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:46:26,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=259, Unknown=10, NotChecked=34, Total=380 [2023-11-12 00:46:26,121 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:26,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:26,205 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2023-11-12 00:46:26,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:46:26,206 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-12 00:46:26,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:26,207 INFO L225 Difference]: With dead ends: 66 [2023-11-12 00:46:26,207 INFO L226 Difference]: Without dead ends: 44 [2023-11-12 00:46:26,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=77, Invalid=259, Unknown=10, NotChecked=34, Total=380 [2023-11-12 00:46:26,209 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 36 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:26,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 24 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:46:26,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-12 00:46:26,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 28. [2023-11-12 00:46:26,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:46:26,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2023-11-12 00:46:26,218 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 20 [2023-11-12 00:46:26,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:26,218 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2023-11-12 00:46:26,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:26,218 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2023-11-12 00:46:26,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-12 00:46:26,219 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:26,219 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:46:26,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:46:26,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:26,425 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:26,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:26,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1018450997, now seen corresponding path program 2 times [2023-11-12 00:46:26,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:26,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472825965] [2023-11-12 00:46:26,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:26,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:26,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:26,568 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-12 00:46:26,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:26,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472825965] [2023-11-12 00:46:26,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472825965] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:46:26,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185725646] [2023-11-12 00:46:26,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:46:26,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:26,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:46:26,571 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:46:26,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:46:26,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 00:46:26,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:46:26,672 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:46:26,674 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:46:26,688 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-12 00:46:26,688 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:46:26,709 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-12 00:46:26,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185725646] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:46:26,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1214306331] [2023-11-12 00:46:26,714 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-12 00:46:26,714 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:46:26,714 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:46:26,715 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:46:26,715 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:46:27,707 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 109 for LOIs [2023-11-12 00:46:27,817 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:46:28,807 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_#memory_int_76| (Array Int (Array Int Int))) (|v_ULTIMATE.start_insert_#in~set#1.offset_30| Int) (|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_insert_~value#1_31| Int) (|v_ULTIMATE.start_elem_exists_~value#1_30| Int) (|v_ULTIMATE.start_main_#t~mem14#1_40| Int) (|v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_insert_#in~size#1_30| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_27| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_#t~ret15#1_38| Int) (|v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_insert_~set#1.offset_31| Int) (|v_ULTIMATE.start_elem_exists_~i~0#1_37| Int) (|v_ULTIMATE.start_insert_~set#1.base_31| Int) (|v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_insert_~size#1_31| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~n~0#1_58| Int) (|v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_27| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_30| Int) (|v_ULTIMATE.start_insert_#res#1_29| Int) (|v_ULTIMATE.start_insert_#in~value#1_30| Int) (|v_ULTIMATE.start_elem_exists_~size#1_30| Int) (|v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_2| Int)) (let ((.cse2 (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_2| 0)) (.cse5 (= |v_ULTIMATE.start_elem_exists_~i~0#1_37| 0))) (let ((.cse4 (<= 1 |v_ULTIMATE.start_elem_exists_~size#1_30|)) (.cse3 (and (<= |v_ULTIMATE.start_elem_exists_~size#1_30| 0) .cse2 .cse5))) (and (let ((.cse0 (let ((.cse1 (select |c_#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_2|))) (= (select .cse1 (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_2| 4)) (select .cse1 |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_2|))))) (or (and .cse0 (= |c___VERIFIER_assert_#in~cond| 0)) (and (not .cse0) (= |c___VERIFIER_assert_#in~cond| 1)))) (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_2|) (<= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_2| 2147483647) (or (and .cse2 (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_2| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_2|) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_2| (+ |v_ULTIMATE.start_main_~n~0#1_58| 1)) (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_2| 2147483647) (= |c_#memory_int| (store |v_#memory_int_76| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_2| (store (select |v_#memory_int_76| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_2|) (+ (* |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_2| 4) |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_2| (- 4)) (select (select |v_#memory_int_76| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_2|) (+ (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_2| 4) (- 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_2|))))) (<= 0 (+ |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_2| 2147483648))) (and (= |v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_2| |v_ULTIMATE.start_main_#t~mem14#1_40|) (not .cse2) (= |v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_2| |v_ULTIMATE.start_insert_#in~set#1.offset_30|) (= |v_ULTIMATE.start_insert_#in~set#1.base_30| |v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_2|) (= |v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_2| |v_ULTIMATE.start_insert_~set#1.base_31|) (= |v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_2| |v_ULTIMATE.start_main_#t~ret15#1_38|) (= |v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_2| |v_ULTIMATE.start_insert_~set#1.offset_31|) (= |v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_2| |v_ULTIMATE.start_insert_#in~value#1_30|) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_2| |v_ULTIMATE.start_insert_#res#1_29|) (= |v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_2| |v_ULTIMATE.start_insert_~size#1_31|) (= |v_#memory_int_76| |c_#memory_int|) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_2| |v_ULTIMATE.start_main_~n~0#1_58|) (= |v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_2| |v_ULTIMATE.start_insert_#in~size#1_30|) (= |v_ULTIMATE.start_insert_~value#1_31| |v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_2|))) (<= 0 (+ |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_2| 2147483648)) (or .cse3 (and .cse2 .cse4 .cse5)) (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_2|) (or (and .cse2 .cse4 (= (select (select |v_#memory_int_76| |v_ULTIMATE.start_elem_exists_~set#1.base_27|) |v_ULTIMATE.start_elem_exists_~set#1.offset_27|) |v_ULTIMATE.start_elem_exists_~value#1_30|) .cse5) .cse3))))) is different from true [2023-11-12 00:46:29,037 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1081#(and (exists ((|v_ULTIMATE.start_elem_exists_~i~0#1_37| Int) (|v_#memory_int_76| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~n~0#1_58| Int) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_elem_exists_~value#1_30| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_27| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_27| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_elem_exists_~size#1_30| Int)) (and (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_2| 0) (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_2|) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_2| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_2|) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_2| (+ |v_ULTIMATE.start_main_~n~0#1_58| 1)) (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_2| 2147483647) (= |#memory_int| (store |v_#memory_int_76| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_2| (store (select |v_#memory_int_76| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_2|) (+ (* |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_2| 4) |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_2| (- 4)) (select (select |v_#memory_int_76| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_2|) (+ (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_2| 4) (- 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_2|))))) (or (< |v_ULTIMATE.start_elem_exists_~size#1_30| 1) (= (select (select |v_#memory_int_76| |v_ULTIMATE.start_elem_exists_~set#1.base_27|) |v_ULTIMATE.start_elem_exists_~set#1.offset_27|) |v_ULTIMATE.start_elem_exists_~value#1_30|)) (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_2|) (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_2|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_2| 4)) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_2|) |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_2|)) (= |v_ULTIMATE.start_elem_exists_~i~0#1_37| 0))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-12 00:46:29,037 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:46:29,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:46:29,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-12 00:46:29,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153924931] [2023-11-12 00:46:29,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:46:29,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:46:29,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:29,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:46:29,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=285, Unknown=9, NotChecked=34, Total=380 [2023-11-12 00:46:29,039 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:29,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:29,121 INFO L93 Difference]: Finished difference Result 66 states and 89 transitions. [2023-11-12 00:46:29,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:46:29,121 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-12 00:46:29,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:29,122 INFO L225 Difference]: With dead ends: 66 [2023-11-12 00:46:29,122 INFO L226 Difference]: Without dead ends: 47 [2023-11-12 00:46:29,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=52, Invalid=285, Unknown=9, NotChecked=34, Total=380 [2023-11-12 00:46:29,123 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:29,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 35 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:46:29,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-12 00:46:29,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2023-11-12 00:46:29,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:46:29,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 58 transitions. [2023-11-12 00:46:29,134 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 58 transitions. Word has length 23 [2023-11-12 00:46:29,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:29,134 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 58 transitions. [2023-11-12 00:46:29,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:29,135 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 58 transitions. [2023-11-12 00:46:29,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-12 00:46:29,136 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:29,136 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:46:29,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 00:46:29,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 00:46:29,342 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:29,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:29,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1837175918, now seen corresponding path program 3 times [2023-11-12 00:46:29,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:29,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567378172] [2023-11-12 00:46:29,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:29,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:29,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:29,492 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-12 00:46:29,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:29,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567378172] [2023-11-12 00:46:29,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567378172] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:46:29,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752691488] [2023-11-12 00:46:29,492 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 00:46:29,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:29,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:46:29,494 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:46:29,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 00:46:29,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 00:46:29,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:46:29,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 00:46:29,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:46:29,651 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-12 00:46:29,651 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:46:29,705 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-12 00:46:29,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752691488] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:46:29,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [978832452] [2023-11-12 00:46:29,708 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-12 00:46:29,708 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:46:29,709 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:46:29,709 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:46:29,709 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:46:30,587 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 109 for LOIs [2023-11-12 00:46:30,713 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:46:31,605 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_elem_exists_~i~0#1_49| Int) (|v_#memory_int_98| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_insert_~value#1_39| Int) (|v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_#t~mem14#1_48| Int) (|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~n~0#1_66| Int) (|v_ULTIMATE.start_insert_#in~set#1.offset_38| Int) (|v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_insert_~set#1.offset_39| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_39| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_insert_#in~size#1_38| Int) (|v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_elem_exists_~size#1_42| Int) (|v_ULTIMATE.start_insert_#res#1_37| Int) (|v_ULTIMATE.start_elem_exists_~value#1_42| Int) (|v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_insert_#in~value#1_38| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_insert_~set#1.base_39| Int) (|v_ULTIMATE.start_insert_~size#1_39| Int) (|v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_39| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_#t~ret15#1_46| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_38| Int) (|v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_3| Int)) (let ((.cse2 (= |v_ULTIMATE.start_elem_exists_~i~0#1_49| 0)) (.cse0 (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_3| 0))) (let ((.cse3 (<= 1 |v_ULTIMATE.start_elem_exists_~size#1_42|)) (.cse1 (and .cse2 .cse0 (<= |v_ULTIMATE.start_elem_exists_~size#1_42| 0)))) (and (or (and (= |c_#memory_int| (store |v_#memory_int_98| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_3| (store (select |v_#memory_int_98| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_3|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_3| (- 4) (* |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_3| 4)) (select (select |v_#memory_int_98| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_3|) (+ (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_3| 4) (- 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_3|))))) (<= 0 (+ |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_3| 2147483648)) (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_3| 2147483647) .cse0 (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_3| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_3|) (= (+ |v_ULTIMATE.start_main_~n~0#1_66| 1) |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_3|)) (and (= |v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_3| |v_ULTIMATE.start_insert_#in~value#1_38|) (= |v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_3| |v_ULTIMATE.start_main_#t~ret15#1_46|) (= |v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_3| |v_ULTIMATE.start_insert_~set#1.offset_39|) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_3| |v_ULTIMATE.start_main_~n~0#1_66|) (= |v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_3| |v_ULTIMATE.start_main_#t~mem14#1_48|) (= |v_ULTIMATE.start_insert_~value#1_39| |v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_3|) (= |v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_3| |v_ULTIMATE.start_insert_#in~size#1_38|) (= |v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_3| |v_ULTIMATE.start_insert_~set#1.base_39|) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_3| |v_ULTIMATE.start_insert_#res#1_37|) (= |v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_3| |v_ULTIMATE.start_insert_#in~set#1.offset_38|) (= |v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_3| |v_ULTIMATE.start_insert_~size#1_39|) (= |v_#memory_int_98| |c_#memory_int|) (= |v_ULTIMATE.start_insert_#in~set#1.base_38| |v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_3|) (not .cse0))) (or .cse1 (and .cse2 .cse0 .cse3)) (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_3|) (<= 0 (+ |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_3| 2147483648)) (<= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_3| 2147483647) (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_3|) (let ((.cse4 (let ((.cse5 (select |c_#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_3|))) (= (select .cse5 |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_3|) (select .cse5 (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_3| 4)))))) (or (and (= |c___VERIFIER_assert_#in~cond| 1) (not .cse4)) (and .cse4 (= |c___VERIFIER_assert_#in~cond| 0)))) (or (and .cse2 (= (select (select |v_#memory_int_98| |v_ULTIMATE.start_elem_exists_~set#1.base_39|) |v_ULTIMATE.start_elem_exists_~set#1.offset_39|) |v_ULTIMATE.start_elem_exists_~value#1_42|) .cse0 .cse3) .cse1))))) is different from true [2023-11-12 00:46:31,820 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1473#(and (exists ((|v_ULTIMATE.start_elem_exists_~i~0#1_49| Int) (|v_ULTIMATE.start_elem_exists_~value#1_42| Int) (|v_#memory_int_98| (Array Int (Array Int Int))) (|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~n~0#1_66| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_39| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_39| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_elem_exists_~size#1_42| Int)) (and (= |v_ULTIMATE.start_elem_exists_~i~0#1_49| 0) (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_3|) (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_3| 2147483647) (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_3| 0) (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_3|) |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_3|) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_3|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_3| 4))) (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_3|) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_3| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_3|) (= (+ |v_ULTIMATE.start_main_~n~0#1_66| 1) |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_3|) (= |#memory_int| (store |v_#memory_int_98| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_3| (store (select |v_#memory_int_98| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_3|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_3| (- 4) (* |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_3| 4)) (select (select |v_#memory_int_98| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_3|) (+ (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_3| 4) (- 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_3|))))) (or (< |v_ULTIMATE.start_elem_exists_~size#1_42| 1) (= (select (select |v_#memory_int_98| |v_ULTIMATE.start_elem_exists_~set#1.base_39|) |v_ULTIMATE.start_elem_exists_~set#1.offset_39|) |v_ULTIMATE.start_elem_exists_~value#1_42|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-12 00:46:31,820 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:46:31,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:46:31,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-12 00:46:31,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911651374] [2023-11-12 00:46:31,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:46:31,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 00:46:31,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:31,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 00:46:31,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=431, Unknown=9, NotChecked=46, Total=650 [2023-11-12 00:46:31,824 INFO L87 Difference]: Start difference. First operand 45 states and 58 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:31,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:31,980 INFO L93 Difference]: Finished difference Result 130 states and 181 transitions. [2023-11-12 00:46:31,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 00:46:31,981 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-11-12 00:46:31,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:31,982 INFO L225 Difference]: With dead ends: 130 [2023-11-12 00:46:31,983 INFO L226 Difference]: Without dead ends: 91 [2023-11-12 00:46:31,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=164, Invalid=431, Unknown=9, NotChecked=46, Total=650 [2023-11-12 00:46:31,984 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 65 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:31,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 35 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:46:31,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-11-12 00:46:31,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 51. [2023-11-12 00:46:31,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 48 states have internal predecessors, (62), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:46:32,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2023-11-12 00:46:32,000 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 32 [2023-11-12 00:46:32,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:32,000 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2023-11-12 00:46:32,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:32,001 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2023-11-12 00:46:32,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-12 00:46:32,002 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:32,002 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:46:32,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 00:46:32,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:32,221 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:32,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:32,222 INFO L85 PathProgramCache]: Analyzing trace with hash -305718834, now seen corresponding path program 4 times [2023-11-12 00:46:32,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:32,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347834720] [2023-11-12 00:46:32,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:32,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:32,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:32,533 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-12 00:46:32,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:32,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347834720] [2023-11-12 00:46:32,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347834720] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:46:32,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883618419] [2023-11-12 00:46:32,534 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 00:46:32,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:32,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:46:32,549 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:46:32,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 00:46:32,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:32,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 00:46:32,713 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:46:32,742 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-12 00:46:32,742 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:46:32,967 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-12 00:46:32,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883618419] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:46:32,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1609219297] [2023-11-12 00:46:32,970 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-12 00:46:32,970 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:46:32,976 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:46:32,976 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:46:32,977 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:46:33,824 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 109 for LOIs [2023-11-12 00:46:33,901 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:46:34,830 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_elem_exists_~value#1_54| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_insert_~size#1_47| Int) (|v_ULTIMATE.start_insert_~set#1.base_47| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_#t~ret15#1_54| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_46| Int) (|v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_insert_#in~value#1_46| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_51| Int) (|v_ULTIMATE.start_elem_exists_~i~0#1_61| Int) (|v_ULTIMATE.start_insert_#in~set#1.offset_46| Int) (|v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_4| Int) (|v_#memory_int_126| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~n~0#1_74| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_insert_~value#1_47| Int) (|v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_#t~mem14#1_56| Int) (|v_ULTIMATE.start_insert_~set#1.offset_47| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_insert_#in~size#1_46| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_51| Int) (|v_ULTIMATE.start_elem_exists_~size#1_54| Int) (|v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_insert_#res#1_45| Int)) (let ((.cse1 (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_4| 0)) (.cse2 (= |v_ULTIMATE.start_elem_exists_~i~0#1_61| 0))) (let ((.cse3 (<= 1 |v_ULTIMATE.start_elem_exists_~size#1_54|)) (.cse0 (and (<= |v_ULTIMATE.start_elem_exists_~size#1_54| 0) .cse1 .cse2))) (and (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_4|) (or .cse0 (and .cse1 .cse2 .cse3 (= |v_ULTIMATE.start_elem_exists_~value#1_54| (select (select |v_#memory_int_126| |v_ULTIMATE.start_elem_exists_~set#1.base_51|) |v_ULTIMATE.start_elem_exists_~set#1.offset_51|)))) (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_4|) (let ((.cse4 (let ((.cse5 (select |c_#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_4|))) (= (select .cse5 (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_4| 4)) (select .cse5 |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_4|))))) (or (and .cse4 (= |c___VERIFIER_assert_#in~cond| 0)) (and (not .cse4) (= |c___VERIFIER_assert_#in~cond| 1)))) (<= 0 (+ |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_4| 2147483648)) (or (and (= |v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_4| |v_ULTIMATE.start_insert_~set#1.base_47|) (= |v_ULTIMATE.start_insert_#in~set#1.base_46| |v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_4|) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_4| |v_ULTIMATE.start_main_~n~0#1_74|) (= |c_#memory_int| |v_#memory_int_126|) (= |v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_4| |v_ULTIMATE.start_insert_#in~set#1.offset_46|) (= |v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_4| |v_ULTIMATE.start_main_#t~ret15#1_54|) (= |v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_4| |v_ULTIMATE.start_insert_#in~value#1_46|) (= |v_ULTIMATE.start_insert_~value#1_47| |v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_4|) (not .cse1) (= |v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_4| |v_ULTIMATE.start_insert_~size#1_47|) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_4| |v_ULTIMATE.start_insert_#res#1_45|) (= |v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_4| |v_ULTIMATE.start_insert_#in~size#1_46|) (= |v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_4| |v_ULTIMATE.start_insert_~set#1.offset_47|) (= |v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_4| |v_ULTIMATE.start_main_#t~mem14#1_56|)) (and (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_4| (+ |v_ULTIMATE.start_main_~n~0#1_74| 1)) (= |c_#memory_int| (store |v_#memory_int_126| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_4| (store (select |v_#memory_int_126| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_4|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_4| (- 4) (* |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_4| 4)) (select (select |v_#memory_int_126| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_4|) (+ (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_4| 4) (- 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_4|))))) .cse1 (<= 0 (+ |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_4| 2147483648)) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_4| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_4|) (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_4| 2147483647))) (<= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_4| 2147483647) (or (and .cse1 .cse2 .cse3) .cse0))))) is different from true [2023-11-12 00:46:35,065 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2038#(and (exists ((|v_ULTIMATE.start_elem_exists_~value#1_54| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_4| Int) (|v_#memory_int_126| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~n~0#1_74| Int) (|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_51| Int) (|v_ULTIMATE.start_elem_exists_~size#1_54| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_51| Int) (|v_ULTIMATE.start_elem_exists_~i~0#1_61| Int)) (and (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_4|) (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_4|) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_4| (+ |v_ULTIMATE.start_main_~n~0#1_74| 1)) (= |#memory_int| (store |v_#memory_int_126| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_4| (store (select |v_#memory_int_126| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_4|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_4| (- 4) (* |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_4| 4)) (select (select |v_#memory_int_126| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_4|) (+ (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_4| 4) (- 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_4|))))) (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_4| 0) (= |v_ULTIMATE.start_elem_exists_~i~0#1_61| 0) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_4| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_4|) (or (< |v_ULTIMATE.start_elem_exists_~size#1_54| 1) (= |v_ULTIMATE.start_elem_exists_~value#1_54| (select (select |v_#memory_int_126| |v_ULTIMATE.start_elem_exists_~set#1.base_51|) |v_ULTIMATE.start_elem_exists_~set#1.offset_51|))) (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_4|) |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_4|) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_4|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_4| 4))) (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_4| 2147483647))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-12 00:46:35,066 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:46:35,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:46:35,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-11-12 00:46:35,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751861429] [2023-11-12 00:46:35,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:46:35,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-12 00:46:35,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:35,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-12 00:46:35,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=446, Invalid=881, Unknown=9, NotChecked=70, Total=1406 [2023-11-12 00:46:35,069 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:35,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:35,388 INFO L93 Difference]: Finished difference Result 190 states and 271 transitions. [2023-11-12 00:46:35,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-12 00:46:35,389 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-11-12 00:46:35,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:35,391 INFO L225 Difference]: With dead ends: 190 [2023-11-12 00:46:35,391 INFO L226 Difference]: Without dead ends: 151 [2023-11-12 00:46:35,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=446, Invalid=881, Unknown=9, NotChecked=70, Total=1406 [2023-11-12 00:46:35,393 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 193 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:35,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 24 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:46:35,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-11-12 00:46:35,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 63. [2023-11-12 00:46:35,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 60 states have (on average 1.2333333333333334) internal successors, (74), 60 states have internal predecessors, (74), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:46:35,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2023-11-12 00:46:35,414 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 38 [2023-11-12 00:46:35,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:35,414 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2023-11-12 00:46:35,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:35,415 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2023-11-12 00:46:35,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-12 00:46:35,417 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:35,417 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:46:35,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 00:46:35,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:35,623 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:35,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:35,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1049922702, now seen corresponding path program 5 times [2023-11-12 00:46:35,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:35,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639309021] [2023-11-12 00:46:35,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:35,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:35,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:36,427 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-12 00:46:36,427 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:36,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639309021] [2023-11-12 00:46:36,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639309021] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:46:36,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436142906] [2023-11-12 00:46:36,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:46:36,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:36,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:46:36,431 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:46:36,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 00:46:36,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 00:46:36,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:46:36,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 00:46:36,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:46:36,678 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-11-12 00:46:36,678 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:46:36,799 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-11-12 00:46:36,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436142906] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:46:36,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [516875213] [2023-11-12 00:46:36,801 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-12 00:46:36,801 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:46:36,802 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:46:36,802 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:46:36,802 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:46:37,642 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 109 for LOIs [2023-11-12 00:46:37,722 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:46:38,831 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~n~0#1_82| Int) (|v_ULTIMATE.start_insert_#in~set#1.offset_54| Int) (|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_insert_~value#1_55| Int) (|v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_#t~mem14#1_64| Int) (|v_ULTIMATE.start_insert_#in~size#1_54| Int) (|v_#memory_int_144| (Array Int (Array Int Int))) (|v_ULTIMATE.start_elem_exists_~size#1_66| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_63| Int) (|v_ULTIMATE.start_insert_~set#1.offset_55| Int) (|v_ULTIMATE.start_insert_#res#1_53| Int) (|v_ULTIMATE.start_insert_~set#1.base_55| Int) (|v_ULTIMATE.start_insert_~size#1_55| Int) (|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_elem_exists_~value#1_66| Int) (|v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_54| Int) (|v_ULTIMATE.start_main_#t~ret15#1_62| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_elem_exists_~i~0#1_73| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_63| Int) (|v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_insert_#in~value#1_54| Int)) (let ((.cse4 (= |v_ULTIMATE.start_elem_exists_~i~0#1_73| 0)) (.cse2 (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_5| 0))) (let ((.cse3 (and .cse4 .cse2 (<= |v_ULTIMATE.start_elem_exists_~size#1_66| 0))) (.cse5 (<= 1 |v_ULTIMATE.start_elem_exists_~size#1_66|))) (and (<= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_5| 2147483647) (let ((.cse0 (let ((.cse1 (select |c_#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_5|))) (= (select .cse1 (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_5| 4)) (select .cse1 |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_5|))))) (or (and (not .cse0) (= |c___VERIFIER_assert_#in~cond| 1)) (and (= |c___VERIFIER_assert_#in~cond| 0) .cse0))) (<= 0 (+ |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_5| 2147483648)) (or (and (= |v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_5| |v_ULTIMATE.start_main_#t~mem14#1_64|) (= |v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_5| |v_ULTIMATE.start_main_#t~ret15#1_62|) (= |v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_5| |v_ULTIMATE.start_insert_#in~size#1_54|) (= |c_#memory_int| |v_#memory_int_144|) (= |v_ULTIMATE.start_insert_#in~set#1.base_54| |v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_5|) (= |v_ULTIMATE.start_insert_~value#1_55| |v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_5|) (= |v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_5| |v_ULTIMATE.start_insert_~set#1.offset_55|) (= |v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_5| |v_ULTIMATE.start_insert_~size#1_55|) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_5| |v_ULTIMATE.start_insert_#res#1_53|) (= |v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_5| |v_ULTIMATE.start_insert_#in~value#1_54|) (not .cse2) (= |v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_5| |v_ULTIMATE.start_insert_#in~set#1.offset_54|) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_5| |v_ULTIMATE.start_main_~n~0#1_82|) (= |v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_5| |v_ULTIMATE.start_insert_~set#1.base_55|)) (and (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_5| 2147483647) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_5| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_5|) (<= 0 (+ |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_5| 2147483648)) .cse2 (= (store |v_#memory_int_144| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_5| (store (select |v_#memory_int_144| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_5|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_5| (* |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_5| 4) (- 4)) (select (select |v_#memory_int_144| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_5|) (+ (- 4) (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_5| 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_5|)))) |c_#memory_int|) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_5| (+ |v_ULTIMATE.start_main_~n~0#1_82| 1)))) (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_5|) (or .cse3 (and .cse4 .cse2 .cse5)) (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_5|) (or .cse3 (and (= (select (select |v_#memory_int_144| |v_ULTIMATE.start_elem_exists_~set#1.base_63|) |v_ULTIMATE.start_elem_exists_~set#1.offset_63|) |v_ULTIMATE.start_elem_exists_~value#1_66|) .cse4 .cse2 .cse5)))))) is different from true [2023-11-12 00:46:39,146 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2817#(and (exists ((|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_elem_exists_~value#1_66| Int) (|v_ULTIMATE.start_main_~n~0#1_82| Int) (|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_5| Int) (|v_#memory_int_144| (Array Int (Array Int Int))) (|v_ULTIMATE.start_elem_exists_~size#1_66| Int) (|v_ULTIMATE.start_elem_exists_~i~0#1_73| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_63| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_63| Int)) (and (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_5| 2147483647) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_5| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_5|) (= |v_ULTIMATE.start_elem_exists_~i~0#1_73| 0) (or (= (select (select |v_#memory_int_144| |v_ULTIMATE.start_elem_exists_~set#1.base_63|) |v_ULTIMATE.start_elem_exists_~set#1.offset_63|) |v_ULTIMATE.start_elem_exists_~value#1_66|) (< |v_ULTIMATE.start_elem_exists_~size#1_66| 1)) (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_5| 0) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_5| (+ |v_ULTIMATE.start_main_~n~0#1_82| 1)) (= (store |v_#memory_int_144| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_5| (store (select |v_#memory_int_144| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_5|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_5| (* |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_5| 4) (- 4)) (select (select |v_#memory_int_144| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_5|) (+ (- 4) (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_5| 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_5|)))) |#memory_int|) (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_5|) (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_5|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_5| 4)) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_5|) |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_5|)) (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_5|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-12 00:46:39,147 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:46:39,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:46:39,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2023-11-12 00:46:39,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787250379] [2023-11-12 00:46:39,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:46:39,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-12 00:46:39,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:39,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-12 00:46:39,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=511, Invalid=1646, Unknown=9, NotChecked=90, Total=2256 [2023-11-12 00:46:39,151 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:39,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:39,794 INFO L93 Difference]: Finished difference Result 245 states and 347 transitions. [2023-11-12 00:46:39,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-12 00:46:39,795 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2023-11-12 00:46:39,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:39,797 INFO L225 Difference]: With dead ends: 245 [2023-11-12 00:46:39,797 INFO L226 Difference]: Without dead ends: 206 [2023-11-12 00:46:39,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=861, Invalid=2326, Unknown=9, NotChecked=110, Total=3306 [2023-11-12 00:46:39,800 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 556 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:39,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [579 Valid, 55 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:46:39,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2023-11-12 00:46:39,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 112. [2023-11-12 00:46:39,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 109 states have (on average 1.2935779816513762) internal successors, (141), 109 states have internal predecessors, (141), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:46:39,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 143 transitions. [2023-11-12 00:46:39,831 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 143 transitions. Word has length 50 [2023-11-12 00:46:39,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:39,831 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 143 transitions. [2023-11-12 00:46:39,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:39,832 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 143 transitions. [2023-11-12 00:46:39,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-12 00:46:39,834 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:39,834 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:46:39,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 00:46:40,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-12 00:46:40,040 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:40,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:40,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1225540103, now seen corresponding path program 6 times [2023-11-12 00:46:40,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:40,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128245206] [2023-11-12 00:46:40,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:40,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:40,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:41,171 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2023-11-12 00:46:41,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:41,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128245206] [2023-11-12 00:46:41,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128245206] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:46:41,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212091236] [2023-11-12 00:46:41,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 00:46:41,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:41,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:46:41,173 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:46:41,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 00:46:41,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 00:46:41,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:46:41,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-12 00:46:41,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:46:41,530 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2023-11-12 00:46:41,531 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:46:42,443 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2023-11-12 00:46:42,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212091236] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:46:42,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [449197229] [2023-11-12 00:46:42,446 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-12 00:46:42,446 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:46:42,446 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:46:42,446 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:46:42,446 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:46:43,236 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 109 for LOIs [2023-11-12 00:46:43,333 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:46:44,378 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_elem_exists_~value#1_90| Int) (|v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_insert_~size#1_69| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_insert_~set#1.base_69| Int) (|v_ULTIMATE.start_main_#t~ret15#1_76| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_68| Int) (|v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_insert_#in~value#1_68| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_87| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_insert_#in~set#1.offset_68| Int) (|v_ULTIMATE.start_elem_exists_~size#1_90| Int) (|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_main_~n~0#1_96| Int) (|v_ULTIMATE.start_insert_~value#1_69| Int) (|v_ULTIMATE.start_main_#t~mem14#1_78| Int) (|v_ULTIMATE.start_insert_~set#1.offset_69| Int) (|v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_insert_#in~size#1_68| Int) (|v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_87| Int) (|v_ULTIMATE.start_elem_exists_~i~0#1_97| Int) (|v_ULTIMATE.start_insert_#res#1_67| Int) (|v_#memory_int_197| (Array Int (Array Int Int)))) (let ((.cse2 (= |v_ULTIMATE.start_elem_exists_~i~0#1_97| 0)) (.cse3 (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_6| 0))) (let ((.cse5 (and (<= |v_ULTIMATE.start_elem_exists_~size#1_90| 0) .cse2 .cse3)) (.cse4 (<= 1 |v_ULTIMATE.start_elem_exists_~size#1_90|))) (and (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_6|) (let ((.cse0 (let ((.cse1 (select |c_#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_6|))) (= (select .cse1 |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_6|) (select .cse1 (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_6| 4)))))) (or (and (= |c___VERIFIER_assert_#in~cond| 1) (not .cse0)) (and .cse0 (= |c___VERIFIER_assert_#in~cond| 0)))) (or (and (= (select (select |v_#memory_int_197| |v_ULTIMATE.start_elem_exists_~set#1.base_87|) |v_ULTIMATE.start_elem_exists_~set#1.offset_87|) |v_ULTIMATE.start_elem_exists_~value#1_90|) .cse2 .cse3 .cse4) .cse5) (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_6|) (<= 0 (+ |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_6| 2147483648)) (or .cse5 (and .cse2 .cse3 .cse4)) (<= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_6| 2147483647) (or (and (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_6| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_6|) (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_6| 2147483647) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_6| (+ |v_ULTIMATE.start_main_~n~0#1_96| 1)) (<= 0 (+ |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_6| 2147483648)) .cse3 (= (store |v_#memory_int_197| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_6| (store (select |v_#memory_int_197| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_6|) (+ (* |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_6| 4) |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_6| (- 4)) (select (select |v_#memory_int_197| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_6|) (+ (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_6| 4) (- 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_6|)))) |c_#memory_int|)) (and (= |v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_6| |v_ULTIMATE.start_insert_~size#1_69|) (= |v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_6| |v_ULTIMATE.start_insert_#in~value#1_68|) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_6| |v_ULTIMATE.start_insert_#res#1_67|) (not .cse3) (= |c_#memory_int| |v_#memory_int_197|) (= |v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_6| |v_ULTIMATE.start_insert_#in~size#1_68|) (= |v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_6| |v_ULTIMATE.start_insert_~set#1.offset_69|) (= |v_ULTIMATE.start_insert_#in~set#1.base_68| |v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_6|) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_6| |v_ULTIMATE.start_main_~n~0#1_96|) (= |v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_6| |v_ULTIMATE.start_main_#t~ret15#1_76|) (= |v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_6| |v_ULTIMATE.start_insert_~set#1.base_69|) (= |v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_6| |v_ULTIMATE.start_insert_#in~set#1.offset_68|) (= |v_ULTIMATE.start_insert_~value#1_69| |v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_6|) (= |v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_6| |v_ULTIMATE.start_main_#t~mem14#1_78|))))))) is different from true [2023-11-12 00:46:44,672 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3952#(and (exists ((|v_ULTIMATE.start_elem_exists_~size#1_90| Int) (|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_main_~n~0#1_96| Int) (|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_elem_exists_~value#1_90| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_87| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_87| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_elem_exists_~i~0#1_97| Int) (|v_#memory_int_197| (Array Int (Array Int Int)))) (and (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_6|) (or (= (select (select |v_#memory_int_197| |v_ULTIMATE.start_elem_exists_~set#1.base_87|) |v_ULTIMATE.start_elem_exists_~set#1.offset_87|) |v_ULTIMATE.start_elem_exists_~value#1_90|) (< |v_ULTIMATE.start_elem_exists_~size#1_90| 1)) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_6| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_6|) (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_6| 2147483647) (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_6|) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_6| (+ |v_ULTIMATE.start_main_~n~0#1_96| 1)) (= |v_ULTIMATE.start_elem_exists_~i~0#1_97| 0) (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_6| 0) (= |#memory_int| (store |v_#memory_int_197| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_6| (store (select |v_#memory_int_197| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_6|) (+ (* |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_6| 4) |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_6| (- 4)) (select (select |v_#memory_int_197| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_6|) (+ (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_6| 4) (- 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_6|))))) (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_6|) |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_6|) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_6|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_6| 4))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-12 00:46:44,672 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:46:44,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:46:44,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2023-11-12 00:46:44,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490718453] [2023-11-12 00:46:44,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:46:44,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-12 00:46:44,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:44,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-12 00:46:44,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1551, Invalid=2350, Unknown=9, NotChecked=122, Total=4032 [2023-11-12 00:46:44,678 INFO L87 Difference]: Start difference. First operand 112 states and 143 transitions. Second operand has 51 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 50 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:45,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:45,476 INFO L93 Difference]: Finished difference Result 416 states and 598 transitions. [2023-11-12 00:46:45,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-12 00:46:45,476 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 50 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2023-11-12 00:46:45,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:45,479 INFO L225 Difference]: With dead ends: 416 [2023-11-12 00:46:45,480 INFO L226 Difference]: Without dead ends: 329 [2023-11-12 00:46:45,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1103 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1551, Invalid=2350, Unknown=9, NotChecked=122, Total=4032 [2023-11-12 00:46:45,483 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 520 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:45,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [568 Valid, 48 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:46:45,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2023-11-12 00:46:45,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 137. [2023-11-12 00:46:45,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 134 states have (on average 1.2388059701492538) internal successors, (166), 134 states have internal predecessors, (166), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:46:45,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 168 transitions. [2023-11-12 00:46:45,520 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 168 transitions. Word has length 75 [2023-11-12 00:46:45,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:45,521 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 168 transitions. [2023-11-12 00:46:45,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 50 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:45,521 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 168 transitions. [2023-11-12 00:46:45,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-12 00:46:45,523 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:45,524 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:46:45,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 00:46:45,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 00:46:45,730 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:45,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:45,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1564868846, now seen corresponding path program 7 times [2023-11-12 00:46:45,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:45,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718761081] [2023-11-12 00:46:45,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:45,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:45,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:48,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1376 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2023-11-12 00:46:48,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:48,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718761081] [2023-11-12 00:46:48,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718761081] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:46:48,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330802396] [2023-11-12 00:46:48,624 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 00:46:48,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:48,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:46:48,629 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:46:48,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 00:46:48,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:48,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-12 00:46:48,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:46:49,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1376 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2023-11-12 00:46:49,043 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:46:52,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1376 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2023-11-12 00:46:52,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330802396] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:46:52,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [676506552] [2023-11-12 00:46:52,276 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-12 00:46:52,276 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:46:52,276 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:46:52,277 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:46:52,277 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:46:53,046 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 109 for LOIs [2023-11-12 00:46:53,119 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:46:54,321 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_insert_~size#1_83| Int) (|v_ULTIMATE.start_insert_~set#1.base_83| Int) (|v_ULTIMATE.start_insert_#res#1_81| Int) (|v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_insert_#in~size#1_82| Int) (|v_ULTIMATE.start_insert_#in~value#1_82| Int) (|v_ULTIMATE.start_elem_exists_~size#1_114| Int) (|v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_insert_#in~set#1.offset_82| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_elem_exists_~value#1_114| Int) (|v_ULTIMATE.start_insert_~value#1_83| Int) (|v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_#t~ret15#1_90| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_82| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_111| Int) (|v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_elem_exists_~i~0#1_121| Int) (|v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_#t~mem14#1_92| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_insert_~set#1.offset_83| Int) (|v_#memory_int_275| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~n~0#1_110| Int) (|v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_111| Int)) (let ((.cse0 (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_7| 0)) (.cse2 (= |v_ULTIMATE.start_elem_exists_~i~0#1_121| 0))) (let ((.cse1 (<= 1 |v_ULTIMATE.start_elem_exists_~size#1_114|)) (.cse3 (and .cse0 (<= |v_ULTIMATE.start_elem_exists_~size#1_114| 0) .cse2))) (and (or (and .cse0 .cse1 (= |v_ULTIMATE.start_elem_exists_~value#1_114| (select (select |v_#memory_int_275| |v_ULTIMATE.start_elem_exists_~set#1.base_111|) |v_ULTIMATE.start_elem_exists_~set#1.offset_111|)) .cse2) .cse3) (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_7|) (or (and (= |c_#memory_int| (store |v_#memory_int_275| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_7| (store (select |v_#memory_int_275| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_7|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_7| (- 4) (* |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_7| 4)) (select (select |v_#memory_int_275| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_7|) (+ (- 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_7| (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_7| 4)))))) .cse0 (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_7| (+ |v_ULTIMATE.start_main_~n~0#1_110| 1)) (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_7| 2147483647) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_7| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_7|) (<= 0 (+ |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_7| 2147483648))) (and (= |v_ULTIMATE.start_insert_#in~set#1.base_82| |v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_7|) (= |v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_7| |v_ULTIMATE.start_insert_~set#1.base_83|) (= |v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_7| |v_ULTIMATE.start_main_#t~ret15#1_90|) (= |v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_7| |v_ULTIMATE.start_insert_#in~value#1_82|) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_7| |v_ULTIMATE.start_insert_#res#1_81|) (not .cse0) (= |v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_7| |v_ULTIMATE.start_main_#t~mem14#1_92|) (= |v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_7| |v_ULTIMATE.start_insert_~set#1.offset_83|) (= |v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_7| |v_ULTIMATE.start_insert_#in~size#1_82|) (= |v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_7| |v_ULTIMATE.start_insert_#in~set#1.offset_82|) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_7| |v_ULTIMATE.start_main_~n~0#1_110|) (= |v_ULTIMATE.start_insert_~value#1_83| |v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_7|) (= |v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_7| |v_ULTIMATE.start_insert_~size#1_83|) (= |c_#memory_int| |v_#memory_int_275|))) (<= 0 (+ |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_7| 2147483648)) (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_7|) (<= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_7| 2147483647) (let ((.cse4 (let ((.cse5 (select |c_#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_7|))) (= (select .cse5 |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_7|) (select .cse5 (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_7| 4)))))) (or (and (= |c___VERIFIER_assert_#in~cond| 0) .cse4) (and (= |c___VERIFIER_assert_#in~cond| 1) (not .cse4)))) (or (and .cse0 .cse1 .cse2) .cse3))))) is different from true [2023-11-12 00:46:54,682 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5617#(and (exists ((|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_elem_exists_~value#1_114| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_111| Int) (|v_ULTIMATE.start_elem_exists_~size#1_114| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_elem_exists_~i~0#1_121| Int) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_7| Int) (|v_#memory_int_275| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~n~0#1_110| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_111| Int)) (and (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_7|) (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_7| 0) (or (= |v_ULTIMATE.start_elem_exists_~value#1_114| (select (select |v_#memory_int_275| |v_ULTIMATE.start_elem_exists_~set#1.base_111|) |v_ULTIMATE.start_elem_exists_~set#1.offset_111|)) (< |v_ULTIMATE.start_elem_exists_~size#1_114| 1)) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_7| (+ |v_ULTIMATE.start_main_~n~0#1_110| 1)) (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_7|) (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_7| 2147483647) (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_7|) |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_7|) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_7|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_7| 4))) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_7| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_7|) (= |v_ULTIMATE.start_elem_exists_~i~0#1_121| 0) (= |#memory_int| (store |v_#memory_int_275| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_7| (store (select |v_#memory_int_275| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_7|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_7| (- 4) (* |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_7| 4)) (select (select |v_#memory_int_275| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_7|) (+ (- 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_7| (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_7| 4)))))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-12 00:46:54,682 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:46:54,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:46:54,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2023-11-12 00:46:54,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144284987] [2023-11-12 00:46:54,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:46:54,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-11-12 00:46:54,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:54,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-11-12 00:46:54,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5576, Invalid=7075, Unknown=9, NotChecked=222, Total=12882 [2023-11-12 00:46:54,691 INFO L87 Difference]: Start difference. First operand 137 states and 168 transitions. Second operand has 101 states, 101 states have (on average 1.1485148514851484) internal successors, (116), 100 states have internal predecessors, (116), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:57,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:57,700 INFO L93 Difference]: Finished difference Result 666 states and 973 transitions. [2023-11-12 00:46:57,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-11-12 00:46:57,701 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1485148514851484) internal successors, (116), 100 states have internal predecessors, (116), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2023-11-12 00:46:57,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:57,709 INFO L225 Difference]: With dead ends: 666 [2023-11-12 00:46:57,710 INFO L226 Difference]: Without dead ends: 579 [2023-11-12 00:46:57,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2228 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=5576, Invalid=7075, Unknown=9, NotChecked=222, Total=12882 [2023-11-12 00:46:57,716 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 1044 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 480 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1142 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 480 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:57,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1142 Valid, 53 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [480 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 00:46:57,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2023-11-12 00:46:57,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 187. [2023-11-12 00:46:57,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 184 states have (on average 1.173913043478261) internal successors, (216), 184 states have internal predecessors, (216), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:46:57,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 218 transitions. [2023-11-12 00:46:57,790 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 218 transitions. Word has length 100 [2023-11-12 00:46:57,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:57,794 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 218 transitions. [2023-11-12 00:46:57,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1485148514851484) internal successors, (116), 100 states have internal predecessors, (116), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:57,794 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 218 transitions. [2023-11-12 00:46:57,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-11-12 00:46:57,805 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:57,805 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:46:57,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-12 00:46:58,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8c57d1-f4ec-4e1f-a1b1-e2b6092c646f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:58,012 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:58,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:58,013 INFO L85 PathProgramCache]: Analyzing trace with hash 680401678, now seen corresponding path program 8 times [2023-11-12 00:46:58,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:58,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523217412] [2023-11-12 00:46:58,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:58,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:58,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat