./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 751e67420c89b9d0e6d5639ea75482b8ab104ec2c6d8190aacf202ff4b3b3104 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:12:48,031 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:12:48,173 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:12:48,184 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:12:48,185 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:12:48,242 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:12:48,243 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:12:48,244 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:12:48,246 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:12:48,252 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:12:48,253 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:12:48,255 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:12:48,256 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:12:48,257 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:12:48,258 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:12:48,258 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:12:48,259 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:12:48,259 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:12:48,260 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:12:48,260 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:12:48,261 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:12:48,262 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:12:48,263 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:12:48,264 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:12:48,264 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:12:48,265 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:12:48,266 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:12:48,266 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:12:48,267 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:12:48,267 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:12:48,269 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:12:48,269 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:12:48,270 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:12:48,270 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:12:48,270 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:12:48,271 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:12:48,271 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:12:48,272 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:12:48,272 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:12:48,272 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:12:48,273 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:12:48,273 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:12:48,273 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:12:48,274 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:12:48,274 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:12:48,275 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_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 751e67420c89b9d0e6d5639ea75482b8ab104ec2c6d8190aacf202ff4b3b3104 [2023-11-19 05:12:48,665 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:12:48,731 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:12:48,734 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:12:48,736 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:12:48,736 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:12:48,739 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-2.i [2023-11-19 05:12:52,131 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:12:52,453 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:12:52,454 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-2.i [2023-11-19 05:12:52,463 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/data/03c48f9f7/3a11d2ffbeb64b3e85d40014bc5f6dee/FLAG65849c032 [2023-11-19 05:12:52,482 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/data/03c48f9f7/3a11d2ffbeb64b3e85d40014bc5f6dee [2023-11-19 05:12:52,485 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:12:52,487 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:12:52,489 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:12:52,489 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:12:52,496 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:12:52,497 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:12:52" (1/1) ... [2023-11-19 05:12:52,499 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f7f027d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:52, skipping insertion in model container [2023-11-19 05:12:52,499 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:12:52" (1/1) ... [2023-11-19 05:12:52,528 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:12:52,708 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_3c801eae-813b-427d-a361-f18db525c63f/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-2.i[832,845] [2023-11-19 05:12:52,743 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:12:52,754 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:12:52,771 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_3c801eae-813b-427d-a361-f18db525c63f/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-2.i[832,845] [2023-11-19 05:12:52,806 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:12:52,823 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:12:52,824 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:52 WrapperNode [2023-11-19 05:12:52,824 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:12:52,825 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:12:52,825 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:12:52,826 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:12:52,832 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:52" (1/1) ... [2023-11-19 05:12:52,840 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:52" (1/1) ... [2023-11-19 05:12:52,865 INFO L138 Inliner]: procedures = 18, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 138 [2023-11-19 05:12:52,866 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:12:52,866 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:12:52,867 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:12:52,867 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:12:52,877 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:52" (1/1) ... [2023-11-19 05:12:52,878 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:52" (1/1) ... [2023-11-19 05:12:52,881 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:52" (1/1) ... [2023-11-19 05:12:52,881 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:52" (1/1) ... [2023-11-19 05:12:52,888 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:52" (1/1) ... [2023-11-19 05:12:52,892 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:52" (1/1) ... [2023-11-19 05:12:52,894 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:52" (1/1) ... [2023-11-19 05:12:52,896 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:52" (1/1) ... [2023-11-19 05:12:52,899 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:12:52,900 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:12:52,900 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:12:52,900 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:12:52,901 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:52" (1/1) ... [2023-11-19 05:12:52,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:12:52,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:12:52,936 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:12:52,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:12:52,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:12:52,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:12:52,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 05:12:52,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 05:12:52,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:12:52,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:12:52,992 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 05:12:52,992 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-19 05:12:52,992 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-19 05:12:52,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 05:12:53,090 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:12:53,095 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:12:53,374 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:12:53,506 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:12:53,507 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-11-19 05:12:53,512 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:12:53 BoogieIcfgContainer [2023-11-19 05:12:53,513 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:12:53,519 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:12:53,519 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:12:53,524 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:12:53,524 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:12:52" (1/3) ... [2023-11-19 05:12:53,525 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a91cd1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:12:53, skipping insertion in model container [2023-11-19 05:12:53,526 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:52" (2/3) ... [2023-11-19 05:12:53,526 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a91cd1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:12:53, skipping insertion in model container [2023-11-19 05:12:53,526 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:12:53" (3/3) ... [2023-11-19 05:12:53,528 INFO L112 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_ground-2.i [2023-11-19 05:12:53,558 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:12:53,558 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:12:53,622 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:12:53,630 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;@5bd25675, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:12:53,631 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:12:53,636 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) [2023-11-19 05:12:53,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-19 05:12:53,645 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:53,646 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:12:53,646 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:53,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:53,653 INFO L85 PathProgramCache]: Analyzing trace with hash -917584139, now seen corresponding path program 1 times [2023-11-19 05:12:53,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:53,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136870480] [2023-11-19 05:12:53,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:53,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:53,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:53,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:12:53,963 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:53,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136870480] [2023-11-19 05:12:53,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136870480] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:53,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:12:53,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:12:53,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20891645] [2023-11-19 05:12:53,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:53,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:12:53,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:54,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:12:54,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:12:54,044 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) [2023-11-19 05:12:54,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:54,258 INFO L93 Difference]: Finished difference Result 56 states and 90 transitions. [2023-11-19 05:12:54,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:12:54,261 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 [2023-11-19 05:12:54,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:54,272 INFO L225 Difference]: With dead ends: 56 [2023-11-19 05:12:54,273 INFO L226 Difference]: Without dead ends: 35 [2023-11-19 05:12:54,277 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 [2023-11-19 05:12:54,282 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, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:54,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 25 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:12:54,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-19 05:12:54,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2023-11-19 05:12:54,337 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) [2023-11-19 05:12:54,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2023-11-19 05:12:54,341 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 8 [2023-11-19 05:12:54,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:54,342 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2023-11-19 05:12:54,342 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) [2023-11-19 05:12:54,343 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2023-11-19 05:12:54,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-19 05:12:54,344 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:54,345 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:12:54,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:12:54,346 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:54,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:54,347 INFO L85 PathProgramCache]: Analyzing trace with hash -159922450, now seen corresponding path program 1 times [2023-11-19 05:12:54,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:54,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155111730] [2023-11-19 05:12:54,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:54,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:54,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:54,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:12:54,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:54,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155111730] [2023-11-19 05:12:54,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155111730] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:12:54,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793050947] [2023-11-19 05:12:54,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:54,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:12:54,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:12:54,501 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:12:54,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:12:54,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:54,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:12:54,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:12:54,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:12:54,672 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:12:54,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:12:54,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793050947] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:12:54,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1883775125] [2023-11-19 05:12:54,747 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-19 05:12:54,747 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:12:54,753 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:12:54,761 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:12:54,766 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:12:55,279 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:12:55,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1883775125] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:55,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:12:55,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 3] total 8 [2023-11-19 05:12:55,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538987289] [2023-11-19 05:12:55,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:55,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:12:55,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:55,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:12:55,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2023-11-19 05:12:55,347 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) [2023-11-19 05:12:55,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:55,425 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2023-11-19 05:12:55,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:12:55,426 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 [2023-11-19 05:12:55,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:55,427 INFO L225 Difference]: With dead ends: 43 [2023-11-19 05:12:55,428 INFO L226 Difference]: Without dead ends: 23 [2023-11-19 05:12:55,428 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 [2023-11-19 05:12:55,430 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 8 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2023-11-19 05:12:55,431 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] [2023-11-19 05:12:55,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-19 05:12:55,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2023-11-19 05:12:55,438 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) [2023-11-19 05:12:55,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2023-11-19 05:12:55,439 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 9 [2023-11-19 05:12:55,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:55,440 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2023-11-19 05:12:55,440 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) [2023-11-19 05:12:55,440 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2023-11-19 05:12:55,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-19 05:12:55,441 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:55,441 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:12:55,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:12:55,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:12:55,656 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:55,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:55,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1749480658, now seen corresponding path program 1 times [2023-11-19 05:12:55,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:55,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517688099] [2023-11-19 05:12:55,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:55,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:55,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:55,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:12:55,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:55,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517688099] [2023-11-19 05:12:55,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517688099] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:12:55,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342239774] [2023-11-19 05:12:55,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:55,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:12:55,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:12:55,834 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:12:55,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:12:55,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:55,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:12:55,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:12:55,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:12:55,946 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:12:55,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342239774] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:55,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:12:55,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-19 05:12:55,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117747102] [2023-11-19 05:12:55,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:55,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:12:55,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:55,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:12:55,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:12:55,948 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) [2023-11-19 05:12:55,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:55,985 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2023-11-19 05:12:55,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:12:55,985 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 [2023-11-19 05:12:55,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:55,986 INFO L225 Difference]: With dead ends: 39 [2023-11-19 05:12:55,986 INFO L226 Difference]: Without dead ends: 24 [2023-11-19 05:12:55,987 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 [2023-11-19 05:12:55,988 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 [2023-11-19 05:12:55,989 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] [2023-11-19 05:12:55,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-19 05:12:55,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2023-11-19 05:12:55,994 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) [2023-11-19 05:12:55,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2023-11-19 05:12:55,995 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 15 [2023-11-19 05:12:55,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:55,995 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2023-11-19 05:12:55,996 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) [2023-11-19 05:12:55,996 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2023-11-19 05:12:55,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-19 05:12:55,997 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:55,997 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:12:56,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:12:56,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:12:56,207 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:56,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:56,208 INFO L85 PathProgramCache]: Analyzing trace with hash 664213273, now seen corresponding path program 1 times [2023-11-19 05:12:56,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:56,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147617083] [2023-11-19 05:12:56,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:56,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:56,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:56,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:12:56,372 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:56,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147617083] [2023-11-19 05:12:56,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147617083] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:12:56,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748583017] [2023-11-19 05:12:56,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:56,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:12:56,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:12:56,381 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:12:56,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:12:56,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:56,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:12:56,494 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:12:56,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:12:56,512 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:12:56,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:12:56,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748583017] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:12:56,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [180393682] [2023-11-19 05:12:56,539 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-11-19 05:12:56,539 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:12:56,540 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:12:56,540 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:12:56,540 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:12:57,262 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:12:57,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [180393682] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:57,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:12:57,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3, 3] total 12 [2023-11-19 05:12:57,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142386171] [2023-11-19 05:12:57,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:57,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 05:12:57,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:57,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 05:12:57,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2023-11-19 05:12:57,864 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) [2023-11-19 05:12:58,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:58,154 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2023-11-19 05:12:58,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 05:12:58,155 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 [2023-11-19 05:12:58,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:58,156 INFO L225 Difference]: With dead ends: 41 [2023-11-19 05:12:58,156 INFO L226 Difference]: Without dead ends: 27 [2023-11-19 05:12:58,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2023-11-19 05:12:58,157 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 6 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:58,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 37 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:12:58,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-19 05:12:58,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2023-11-19 05:12:58,165 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) [2023-11-19 05:12:58,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2023-11-19 05:12:58,166 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 16 [2023-11-19 05:12:58,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:58,167 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2023-11-19 05:12:58,167 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) [2023-11-19 05:12:58,167 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2023-11-19 05:12:58,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-19 05:12:58,168 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:58,168 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:12:58,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 05:12:58,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:12:58,384 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:58,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:58,385 INFO L85 PathProgramCache]: Analyzing trace with hash -2073541518, now seen corresponding path program 1 times [2023-11-19 05:12:58,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:58,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156818477] [2023-11-19 05:12:58,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:58,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:58,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:58,463 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 05:12:58,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:58,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156818477] [2023-11-19 05:12:58,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156818477] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:12:58,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829643965] [2023-11-19 05:12:58,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:58,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:12:58,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:12:58,466 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:12:58,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 05:12:58,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:58,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:12:58,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:12:58,585 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 05:12:58,585 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:12:58,605 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 05:12:58,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829643965] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:12:58,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [346322347] [2023-11-19 05:12:58,611 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-19 05:12:58,611 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:12:58,612 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:12:58,612 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:12:58,613 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:12:59,863 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 110 for LOIs [2023-11-19 05:13:00,027 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:13:16,453 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '772#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (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)) (and (or (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_1| 0) (= |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|))) (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_ULTIMATE.start_insert_#in~set#1.base_24| |v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_1|) (= |#memory_int| |v_#memory_int_63|) (= |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 (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_1| 0)) (= |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 (= |#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) (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_1| 0) (= |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 (and (= |v_ULTIMATE.start_elem_exists_~i~0#1_29| 0) (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_1| 1) (<= 1 |v_ULTIMATE.start_elem_exists_~size#1_22|)) (and (= |v_ULTIMATE.start_elem_exists_~i~0#1_29| 0) (<= |v_ULTIMATE.start_elem_exists_~size#1_22| 0) (= |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))) (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_1|))))' at error location [2023-11-19 05:13:16,454 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:13:16,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:13:16,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-19 05:13:16,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13110909] [2023-11-19 05:13:16,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:13:16,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:13:16,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:13:16,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:13:16,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=294, Unknown=9, NotChecked=0, Total=380 [2023-11-19 05:13:16,456 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) [2023-11-19 05:13:16,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:13:16,545 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2023-11-19 05:13:16,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:13:16,545 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 [2023-11-19 05:13:16,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:13:16,546 INFO L225 Difference]: With dead ends: 66 [2023-11-19 05:13:16,546 INFO L226 Difference]: Without dead ends: 44 [2023-11-19 05:13:16,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=77, Invalid=294, Unknown=9, NotChecked=0, Total=380 [2023-11-19 05:13:16,548 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 48 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:13:16,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 24 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:13:16,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-19 05:13:16,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 28. [2023-11-19 05:13:16,557 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) [2023-11-19 05:13:16,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2023-11-19 05:13:16,558 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 20 [2023-11-19 05:13:16,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:13:16,558 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2023-11-19 05:13:16,558 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) [2023-11-19 05:13:16,559 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2023-11-19 05:13:16,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-19 05:13:16,559 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:13:16,560 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:13:16,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 05:13:16,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:13:16,784 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:13:16,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:13:16,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1018450997, now seen corresponding path program 2 times [2023-11-19 05:13:16,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:13:16,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670356034] [2023-11-19 05:13:16,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:13:16,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:13:16,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:13:16,920 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 05:13:16,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:13:16,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670356034] [2023-11-19 05:13:16,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670356034] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:13:16,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726694085] [2023-11-19 05:13:16,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 05:13:16,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:13:16,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:13:16,922 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:13:16,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 05:13:17,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 05:13:17,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:13:17,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:13:17,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:13:17,052 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 05:13:17,052 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:13:17,074 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 05:13:17,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726694085] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:13:17,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [507154508] [2023-11-19 05:13:17,079 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-19 05:13:17,079 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:13:17,079 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:13:17,080 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:13:17,080 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:13:18,114 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 110 for LOIs [2023-11-19 05:13:18,226 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:13:20,459 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1079#(and (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)) (and (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_2|) (or (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_2| 0) (= (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|)) (or (and (= |v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_2| |v_ULTIMATE.start_main_#t~mem14#1_40|) (not (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_2| 0)) (= |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_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|) (= |#memory_int| |v_#memory_int_76|)) (and (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_2| 0) (= |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|))))))) (<= 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|)) (or (and (<= |v_ULTIMATE.start_elem_exists_~size#1_30| 0) (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_2| 0) (= |v_ULTIMATE.start_elem_exists_~i~0#1_37| 0)) (and (<= 1 |v_ULTIMATE.start_elem_exists_~size#1_30|) (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_2| 1) (= |v_ULTIMATE.start_elem_exists_~i~0#1_37| 0))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-19 05:13:20,459 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:13:20,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:13:20,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-19 05:13:20,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140466763] [2023-11-19 05:13:20,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:13:20,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:13:20,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:13:20,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:13:20,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=319, Unknown=9, NotChecked=0, Total=380 [2023-11-19 05:13:20,462 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) [2023-11-19 05:13:20,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:13:20,584 INFO L93 Difference]: Finished difference Result 66 states and 89 transitions. [2023-11-19 05:13:20,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:13:20,585 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 [2023-11-19 05:13:20,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:13:20,590 INFO L225 Difference]: With dead ends: 66 [2023-11-19 05:13:20,591 INFO L226 Difference]: Without dead ends: 47 [2023-11-19 05:13:20,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=52, Invalid=319, Unknown=9, NotChecked=0, Total=380 [2023-11-19 05:13:20,595 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:13:20,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 46 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:13:20,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-19 05:13:20,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2023-11-19 05:13:20,616 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) [2023-11-19 05:13:20,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 58 transitions. [2023-11-19 05:13:20,622 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 58 transitions. Word has length 23 [2023-11-19 05:13:20,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:13:20,622 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 58 transitions. [2023-11-19 05:13:20,623 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) [2023-11-19 05:13:20,623 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 58 transitions. [2023-11-19 05:13:20,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-19 05:13:20,624 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:13:20,625 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:13:20,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 05:13:20,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:13:20,850 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:13:20,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:13:20,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1837175918, now seen corresponding path program 3 times [2023-11-19 05:13:20,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:13:20,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940212776] [2023-11-19 05:13:20,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:13:20,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:13:20,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:13:21,077 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-19 05:13:21,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:13:21,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940212776] [2023-11-19 05:13:21,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940212776] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:13:21,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471262923] [2023-11-19 05:13:21,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 05:13:21,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:13:21,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:13:21,080 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:13:21,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 05:13:21,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 05:13:21,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:13:21,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 05:13:21,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:13:21,234 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-19 05:13:21,235 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:13:21,318 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-19 05:13:21,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471262923] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:13:21,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2078671933] [2023-11-19 05:13:21,323 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-19 05:13:21,323 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:13:21,323 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:13:21,324 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:13:21,324 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:13:22,236 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 110 for LOIs [2023-11-19 05:13:22,340 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:13:36,481 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1471#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (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)) (and (<= 100000 |v_ULTIMATE.start_main_~v~0#1_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|) (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|) (or (and (= |v_ULTIMATE.start_elem_exists_~i~0#1_49| 0) (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_3| 0) (<= |v_ULTIMATE.start_elem_exists_~size#1_42| 0)) (and (= |v_ULTIMATE.start_elem_exists_~i~0#1_49| 0) (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_3| 1) (<= 1 |v_ULTIMATE.start_elem_exists_~size#1_42|))) (or (= (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|) (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_3| 0)) (or (and (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_3| 2147483647) (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_3| 0) (= |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|)))))) (and (= |#memory_int| |v_#memory_int_98|) (= |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_ULTIMATE.start_insert_#in~set#1.base_38| |v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_3|) (not (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_3| 0)))))))' at error location [2023-11-19 05:13:36,482 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:13:36,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:13:36,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-19 05:13:36,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955775192] [2023-11-19 05:13:36,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:13:36,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 05:13:36,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:13:36,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 05:13:36,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=477, Unknown=9, NotChecked=0, Total=650 [2023-11-19 05:13:36,485 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) [2023-11-19 05:13:36,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:13:36,679 INFO L93 Difference]: Finished difference Result 130 states and 181 transitions. [2023-11-19 05:13:36,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 05:13:36,680 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 [2023-11-19 05:13:36,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:13:36,681 INFO L225 Difference]: With dead ends: 130 [2023-11-19 05:13:36,682 INFO L226 Difference]: Without dead ends: 91 [2023-11-19 05:13:36,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=164, Invalid=477, Unknown=9, NotChecked=0, Total=650 [2023-11-19 05:13:36,683 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 81 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:13:36,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 23 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:13:36,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-11-19 05:13:36,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 51. [2023-11-19 05:13:36,699 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) [2023-11-19 05:13:36,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2023-11-19 05:13:36,700 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 32 [2023-11-19 05:13:36,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:13:36,700 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2023-11-19 05:13:36,701 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) [2023-11-19 05:13:36,701 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2023-11-19 05:13:36,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-19 05:13:36,702 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:13:36,702 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:13:36,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 05:13:36,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 05:13:36,916 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:13:36,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:13:36,916 INFO L85 PathProgramCache]: Analyzing trace with hash -305718834, now seen corresponding path program 4 times [2023-11-19 05:13:36,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:13:36,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679698647] [2023-11-19 05:13:36,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:13:36,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:13:36,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:13:37,288 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-19 05:13:37,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:13:37,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679698647] [2023-11-19 05:13:37,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679698647] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:13:37,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083229563] [2023-11-19 05:13:37,289 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 05:13:37,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:13:37,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:13:37,290 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:13:37,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 05:13:37,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:13:37,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 05:13:37,422 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:13:37,452 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-19 05:13:37,453 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:13:37,729 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-19 05:13:37,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083229563] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:13:37,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [205190775] [2023-11-19 05:13:37,733 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-19 05:13:37,733 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:13:37,733 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:13:37,734 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:13:37,734 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:13:38,515 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 110 for LOIs [2023-11-19 05:13:38,615 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:13:40,976 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2036#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (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_~size#1_54| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_51| Int) (|v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_insert_#res#1_45| Int)) (and (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_4|) (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_4|) (or (and (= |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_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)) (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|) (= |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 (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_4| 0)) (= |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|) (= |#memory_int| |v_#memory_int_126|) (= |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|))) (or (and (<= |v_ULTIMATE.start_elem_exists_~size#1_54| 0) (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_4| 0) (= |v_ULTIMATE.start_elem_exists_~i~0#1_61| 0)) (and (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_4| 1) (= |v_ULTIMATE.start_elem_exists_~i~0#1_61| 0) (<= 1 |v_ULTIMATE.start_elem_exists_~size#1_54|))) (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))))))' at error location [2023-11-19 05:13:40,976 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:13:40,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:13:40,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-11-19 05:13:40,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947310546] [2023-11-19 05:13:40,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:13:40,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-19 05:13:40,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:13:40,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-19 05:13:40,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=446, Invalid=951, Unknown=9, NotChecked=0, Total=1406 [2023-11-19 05:13:40,979 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) [2023-11-19 05:13:41,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:13:41,362 INFO L93 Difference]: Finished difference Result 190 states and 271 transitions. [2023-11-19 05:13:41,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-19 05:13:41,362 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 [2023-11-19 05:13:41,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:13:41,364 INFO L225 Difference]: With dead ends: 190 [2023-11-19 05:13:41,364 INFO L226 Difference]: Without dead ends: 151 [2023-11-19 05:13:41,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=446, Invalid=951, Unknown=9, NotChecked=0, Total=1406 [2023-11-19 05:13:41,366 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 236 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:13:41,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 23 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:13:41,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-11-19 05:13:41,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 63. [2023-11-19 05:13:41,406 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) [2023-11-19 05:13:41,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2023-11-19 05:13:41,407 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 38 [2023-11-19 05:13:41,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:13:41,408 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2023-11-19 05:13:41,408 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) [2023-11-19 05:13:41,408 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2023-11-19 05:13:41,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-19 05:13:41,419 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:13:41,419 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:13:41,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 05:13:41,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:13:41,641 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:13:41,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:13:41,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1049922702, now seen corresponding path program 5 times [2023-11-19 05:13:41,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:13:41,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571816932] [2023-11-19 05:13:41,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:13:41,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:13:41,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:13:42,530 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-19 05:13:42,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:13:42,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571816932] [2023-11-19 05:13:42,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571816932] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:13:42,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609414227] [2023-11-19 05:13:42,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 05:13:42,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:13:42,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:13:42,536 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:13:42,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 05:13:42,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 05:13:42,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:13:42,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 05:13:42,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:13:42,813 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-11-19 05:13:42,813 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:13:42,945 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-11-19 05:13:42,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609414227] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:13:42,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2092819809] [2023-11-19 05:13:42,948 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-19 05:13:42,948 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:13:42,948 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:13:42,949 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:13:42,949 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:13:43,780 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 110 for LOIs [2023-11-19 05:13:43,857 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:13:46,511 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2815#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (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)) (and (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|) (= |#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 (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_5| 0)) (= |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|) (= |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|)) (or (and (= |v_ULTIMATE.start_elem_exists_~i~0#1_73| 0) (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_5| 0) (<= |v_ULTIMATE.start_elem_exists_~size#1_66| 0)) (and (= |v_ULTIMATE.start_elem_exists_~i~0#1_73| 0) (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_5| 1) (<= 1 |v_ULTIMATE.start_elem_exists_~size#1_66|))) (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_5|) (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_#res#1_BEFORE_CALL_5| 0)))))' at error location [2023-11-19 05:13:46,511 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:13:46,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:13:46,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2023-11-19 05:13:46,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658807104] [2023-11-19 05:13:46,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:13:46,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-19 05:13:46,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:13:46,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-19 05:13:46,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=511, Invalid=1736, Unknown=9, NotChecked=0, Total=2256 [2023-11-19 05:13:46,517 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) [2023-11-19 05:13:47,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:13:47,600 INFO L93 Difference]: Finished difference Result 245 states and 347 transitions. [2023-11-19 05:13:47,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-19 05:13:47,601 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 [2023-11-19 05:13:47,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:13:47,603 INFO L225 Difference]: With dead ends: 245 [2023-11-19 05:13:47,603 INFO L226 Difference]: Without dead ends: 206 [2023-11-19 05:13:47,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 910 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=861, Invalid=2436, Unknown=9, NotChecked=0, Total=3306 [2023-11-19 05:13:47,606 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 488 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:13:47,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [511 Valid, 109 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:13:47,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2023-11-19 05:13:47,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 112. [2023-11-19 05:13:47,669 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) [2023-11-19 05:13:47,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 143 transitions. [2023-11-19 05:13:47,671 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 143 transitions. Word has length 50 [2023-11-19 05:13:47,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:13:47,674 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 143 transitions. [2023-11-19 05:13:47,674 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) [2023-11-19 05:13:47,675 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 143 transitions. [2023-11-19 05:13:47,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-19 05:13:47,677 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:13:47,678 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:13:47,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 05:13:47,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c801eae-813b-427d-a361-f18db525c63f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:13:47,900 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:13:47,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:13:47,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1225540103, now seen corresponding path program 6 times [2023-11-19 05:13:47,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:13:47,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909872606] [2023-11-19 05:13:47,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:13:47,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:13:48,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat