./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 30e01a73 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_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire/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_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire --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-30e01a7 [2023-11-23 21:31:07,816 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:31:07,963 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:31:07,968 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:31:07,970 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:31:08,013 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:31:08,014 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:31:08,014 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:31:08,015 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:31:08,016 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:31:08,017 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:31:08,017 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:31:08,018 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:31:08,018 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:31:08,019 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:31:08,020 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:31:08,020 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:31:08,021 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:31:08,021 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:31:08,022 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:31:08,022 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:31:08,023 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:31:08,024 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:31:08,024 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:31:08,025 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:31:08,025 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:31:08,026 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:31:08,026 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:31:08,026 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:31:08,027 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:31:08,027 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:31:08,028 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:31:08,028 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:31:08,029 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:31:08,029 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:31:08,030 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:31:08,038 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:31:08,039 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:31:08,040 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:31:08,040 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:31:08,041 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:31:08,042 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:31:08,042 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:31:08,042 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:31:08,042 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:31:08,042 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:31:08,043 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:31:08,043 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_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 751e67420c89b9d0e6d5639ea75482b8ab104ec2c6d8190aacf202ff4b3b3104 [2023-11-23 21:31:08,367 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:31:08,395 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:31:08,398 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:31:08,403 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:31:08,404 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:31:08,405 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-2.i [2023-11-23 21:31:11,666 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:31:11,944 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:31:11,945 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a7f4960-decc-4274-9e17-77e8118f45be/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-2.i [2023-11-23 21:31:11,957 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire/data/a11b265ef/2c7bb668349944c38ae0a736220213f0/FLAG5082687de [2023-11-23 21:31:11,974 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire/data/a11b265ef/2c7bb668349944c38ae0a736220213f0 [2023-11-23 21:31:11,977 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:31:11,979 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:31:11,981 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:31:11,981 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:31:11,987 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:31:11,988 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:31:11" (1/1) ... [2023-11-23 21:31:11,989 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@471fae9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:11, skipping insertion in model container [2023-11-23 21:31:11,989 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:31:11" (1/1) ... [2023-11-23 21:31:12,015 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:31:12,178 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_9a7f4960-decc-4274-9e17-77e8118f45be/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-2.i[832,845] [2023-11-23 21:31:12,204 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:31:12,215 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:31:12,228 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_9a7f4960-decc-4274-9e17-77e8118f45be/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-2.i[832,845] [2023-11-23 21:31:12,241 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:31:12,257 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:31:12,257 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:12 WrapperNode [2023-11-23 21:31:12,258 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:31:12,259 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:31:12,259 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:31:12,260 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:31:12,268 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:12" (1/1) ... [2023-11-23 21:31:12,288 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:12" (1/1) ... [2023-11-23 21:31:12,321 INFO L138 Inliner]: procedures = 18, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 138 [2023-11-23 21:31:12,324 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:31:12,325 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:31:12,325 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:31:12,325 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:31:12,340 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:12" (1/1) ... [2023-11-23 21:31:12,341 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:12" (1/1) ... [2023-11-23 21:31:12,360 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:12" (1/1) ... [2023-11-23 21:31:12,360 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:12" (1/1) ... [2023-11-23 21:31:12,368 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:12" (1/1) ... [2023-11-23 21:31:12,388 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:12" (1/1) ... [2023-11-23 21:31:12,390 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:12" (1/1) ... [2023-11-23 21:31:12,392 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:12" (1/1) ... [2023-11-23 21:31:12,397 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:31:12,398 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:31:12,399 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:31:12,399 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:31:12,400 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:12" (1/1) ... [2023-11-23 21:31:12,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:31:12,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:12,441 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:31:12,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:31:12,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:31:12,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:31:12,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:31:12,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:31:12,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:31:12,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:31:12,514 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:31:12,514 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 21:31:12,514 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 21:31:12,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:31:12,619 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:31:12,622 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:31:12,937 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:31:13,048 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:31:13,048 INFO L309 CfgBuilder]: Removed 8 assume(true) statements. [2023-11-23 21:31:13,050 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:31:13 BoogieIcfgContainer [2023-11-23 21:31:13,051 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:31:13,053 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:31:13,053 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:31:13,057 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:31:13,058 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:31:11" (1/3) ... [2023-11-23 21:31:13,058 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74317e77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:31:13, skipping insertion in model container [2023-11-23 21:31:13,059 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:12" (2/3) ... [2023-11-23 21:31:13,059 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74317e77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:31:13, skipping insertion in model container [2023-11-23 21:31:13,059 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:31:13" (3/3) ... [2023-11-23 21:31:13,061 INFO L112 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_ground-2.i [2023-11-23 21:31:13,084 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:31:13,085 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:31:13,139 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:31:13,148 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;@473b8c4e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:31:13,148 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:31:13,154 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) [2023-11-23 21:31:13,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-23 21:31:13,162 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:13,163 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:13,164 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:13,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:13,171 INFO L85 PathProgramCache]: Analyzing trace with hash -917584139, now seen corresponding path program 1 times [2023-11-23 21:31:13,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:13,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707607341] [2023-11-23 21:31:13,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:13,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:13,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:13,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:13,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:13,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707607341] [2023-11-23 21:31:13,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707607341] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:13,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:13,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:31:13,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681656380] [2023-11-23 21:31:13,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:13,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:31:13,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:13,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:31:13,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:31:13,503 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) [2023-11-23 21:31:13,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:13,679 INFO L93 Difference]: Finished difference Result 56 states and 90 transitions. [2023-11-23 21:31:13,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:31:13,682 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 [2023-11-23 21:31:13,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:13,692 INFO L225 Difference]: With dead ends: 56 [2023-11-23 21:31:13,692 INFO L226 Difference]: Without dead ends: 35 [2023-11-23 21:31:13,696 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 [2023-11-23 21:31:13,704 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 15 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:13,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 25 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:31:13,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-23 21:31:13,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2023-11-23 21:31:13,769 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) [2023-11-23 21:31:13,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2023-11-23 21:31:13,772 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 8 [2023-11-23 21:31:13,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:13,773 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2023-11-23 21:31:13,773 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) [2023-11-23 21:31:13,774 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2023-11-23 21:31:13,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-23 21:31:13,775 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:13,775 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:13,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:31:13,775 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:13,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:13,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1778615702, now seen corresponding path program 1 times [2023-11-23 21:31:13,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:13,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666192730] [2023-11-23 21:31:13,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:13,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:13,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:13,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:13,883 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:13,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666192730] [2023-11-23 21:31:13,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666192730] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:31:13,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275070108] [2023-11-23 21:31:13,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:13,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:13,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:13,888 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:31:13,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:31:13,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:13,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:31:14,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:14,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:14,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:31:14,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:14,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275070108] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:31:14,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [564459572] [2023-11-23 21:31:14,163 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-23 21:31:14,163 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:31:14,168 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:31:14,176 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:31:14,177 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:31:14,790 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:31:14,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [564459572] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:14,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:31:14,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 3] total 8 [2023-11-23 21:31:14,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808123362] [2023-11-23 21:31:14,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:14,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:31:14,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:14,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:31:14,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:31:14,855 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) [2023-11-23 21:31:14,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:14,925 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2023-11-23 21:31:14,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:31:14,926 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 [2023-11-23 21:31:14,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:14,927 INFO L225 Difference]: With dead ends: 43 [2023-11-23 21:31:14,927 INFO L226 Difference]: Without dead ends: 23 [2023-11-23 21:31:14,927 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 [2023-11-23 21:31:14,929 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 8 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:14,931 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] [2023-11-23 21:31:14,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-23 21:31:14,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2023-11-23 21:31:14,941 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) [2023-11-23 21:31:14,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2023-11-23 21:31:14,942 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 9 [2023-11-23 21:31:14,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:14,942 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2023-11-23 21:31:14,943 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) [2023-11-23 21:31:14,944 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2023-11-23 21:31:14,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-23 21:31:14,945 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:14,945 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:14,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:31:15,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:15,164 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:15,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:15,165 INFO L85 PathProgramCache]: Analyzing trace with hash 523252138, now seen corresponding path program 1 times [2023-11-23 21:31:15,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:15,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960597494] [2023-11-23 21:31:15,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:15,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:15,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:15,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:31:15,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:15,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960597494] [2023-11-23 21:31:15,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960597494] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:31:15,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498314079] [2023-11-23 21:31:15,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:15,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:15,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:15,343 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:31:15,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:31:15,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:15,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:31:15,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:15,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:31:15,463 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:31:15,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498314079] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:15,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:31:15,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-23 21:31:15,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342561379] [2023-11-23 21:31:15,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:15,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:31:15,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:15,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:31:15,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:31:15,466 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) [2023-11-23 21:31:15,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:15,540 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2023-11-23 21:31:15,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:31:15,541 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 [2023-11-23 21:31:15,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:15,542 INFO L225 Difference]: With dead ends: 39 [2023-11-23 21:31:15,542 INFO L226 Difference]: Without dead ends: 24 [2023-11-23 21:31:15,543 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 [2023-11-23 21:31:15,544 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, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:15,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 22 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:31:15,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-23 21:31:15,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2023-11-23 21:31:15,550 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) [2023-11-23 21:31:15,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2023-11-23 21:31:15,551 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 15 [2023-11-23 21:31:15,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:15,552 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2023-11-23 21:31:15,552 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) [2023-11-23 21:31:15,552 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2023-11-23 21:31:15,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-23 21:31:15,553 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:15,553 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:15,590 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-23 21:31:15,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:15,780 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:15,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:15,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1766431364, now seen corresponding path program 1 times [2023-11-23 21:31:15,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:15,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840737399] [2023-11-23 21:31:15,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:15,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:15,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:15,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:31:15,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:15,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840737399] [2023-11-23 21:31:15,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840737399] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:31:15,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151916437] [2023-11-23 21:31:15,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:15,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:15,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:15,894 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:31:15,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:31:15,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:15,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:31:15,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:16,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:31:16,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:31:16,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:31:16,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151916437] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:31:16,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1495779366] [2023-11-23 21:31:16,038 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-11-23 21:31:16,038 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:31:16,039 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:31:16,039 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:31:16,039 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:31:16,606 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:31:17,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1495779366] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:17,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:31:17,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3, 3] total 12 [2023-11-23 21:31:17,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805196313] [2023-11-23 21:31:17,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:17,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:31:17,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:17,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:31:17,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2023-11-23 21:31:17,060 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) [2023-11-23 21:31:17,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:17,306 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2023-11-23 21:31:17,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 21:31:17,307 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 [2023-11-23 21:31:17,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:17,307 INFO L225 Difference]: With dead ends: 41 [2023-11-23 21:31:17,307 INFO L226 Difference]: Without dead ends: 27 [2023-11-23 21:31:17,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2023-11-23 21:31:17,311 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, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:17,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 37 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:31:17,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-23 21:31:17,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2023-11-23 21:31:17,325 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) [2023-11-23 21:31:17,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2023-11-23 21:31:17,330 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 16 [2023-11-23 21:31:17,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:17,330 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2023-11-23 21:31:17,331 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) [2023-11-23 21:31:17,331 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2023-11-23 21:31:17,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-23 21:31:17,332 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:17,332 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:17,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:31:17,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:17,552 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:17,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:17,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1666995883, now seen corresponding path program 1 times [2023-11-23 21:31:17,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:17,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474232016] [2023-11-23 21:31:17,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:17,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:17,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:17,627 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 21:31:17,627 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:17,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474232016] [2023-11-23 21:31:17,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474232016] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:31:17,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817257] [2023-11-23 21:31:17,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:17,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:17,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:17,629 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:31:17,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:31:17,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:17,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:31:17,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:17,753 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 21:31:17,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:31:17,772 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 21:31:17,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817257] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:31:17,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [542047991] [2023-11-23 21:31:17,778 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-23 21:31:17,778 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:31:17,778 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:31:17,779 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:31:17,779 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:31:18,937 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 110 for LOIs [2023-11-23 21:31:19,070 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:31:33,496 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '772#(and (exists ((|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_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_elem_exists_~size#1_24| 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_~set#1.offset_21| 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_24| 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_insert_#in~size#1_24| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_21| Int) (|v_ULTIMATE.start_elem_exists_~i~0#1_31| Int) (|v_ULTIMATE.start_insert_#res#1_23| Int)) (and (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_main_~n~0#1_52| 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_31| 0) (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_1| 0) (<= |v_ULTIMATE.start_elem_exists_~size#1_24| 0)) (and (<= 1 |v_ULTIMATE.start_elem_exists_~size#1_24|) (= |v_ULTIMATE.start_elem_exists_~i~0#1_31| 0) (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_1| 1))) (<= 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|) (or (< |v_ULTIMATE.start_elem_exists_~size#1_24| 1) (= (select (select |v_#memory_int_63| |v_ULTIMATE.start_elem_exists_~set#1.base_21|) |v_ULTIMATE.start_elem_exists_~set#1.offset_21|) |v_ULTIMATE.start_elem_exists_~value#1_24|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-23 21:31:33,496 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:31:33,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:31:33,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-23 21:31:33,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582172717] [2023-11-23 21:31:33,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:31:33,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:31:33,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:33,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:31:33,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=294, Unknown=9, NotChecked=0, Total=380 [2023-11-23 21:31:33,499 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) [2023-11-23 21:31:33,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:33,596 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2023-11-23 21:31:33,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:31:33,596 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 [2023-11-23 21:31:33,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:33,597 INFO L225 Difference]: With dead ends: 66 [2023-11-23 21:31:33,598 INFO L226 Difference]: Without dead ends: 44 [2023-11-23 21:31:33,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=77, Invalid=294, Unknown=9, NotChecked=0, Total=380 [2023-11-23 21:31:33,599 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 [2023-11-23 21:31:33,600 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] [2023-11-23 21:31:33,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-23 21:31:33,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 28. [2023-11-23 21:31:33,609 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) [2023-11-23 21:31:33,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2023-11-23 21:31:33,611 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 20 [2023-11-23 21:31:33,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:33,611 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2023-11-23 21:31:33,612 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) [2023-11-23 21:31:33,612 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2023-11-23 21:31:33,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-23 21:31:33,613 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:33,613 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:33,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 21:31:33,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:33,814 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:33,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:33,814 INFO L85 PathProgramCache]: Analyzing trace with hash -964089174, now seen corresponding path program 2 times [2023-11-23 21:31:33,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:33,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169137657] [2023-11-23 21:31:33,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:33,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:33,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:33,958 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 21:31:33,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:33,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169137657] [2023-11-23 21:31:33,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169137657] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:31:33,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056739369] [2023-11-23 21:31:33,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:31:33,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:33,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:33,963 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:31:33,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 21:31:34,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-23 21:31:34,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:31:34,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:31:34,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:34,075 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 21:31:34,076 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:31:34,104 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 21:31:34,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056739369] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:31:34,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [745210851] [2023-11-23 21:31:34,110 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-23 21:31:34,110 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:31:34,110 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:31:34,111 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:31:34,111 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:31:35,074 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 110 for LOIs [2023-11-23 21:31:35,195 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:31:47,721 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1079#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_ULTIMATE.start_elem_exists_~value#1_32| Int) (|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_main_#t~mem14#1_40| Int) (|v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_29| Int) (|v_ULTIMATE.start_insert_#in~size#1_30| 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_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_elem_exists_~i~0#1_39| 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_elem_exists_~set#1.base_29| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_30| Int) (|v_ULTIMATE.start_elem_exists_~size#1_32| Int) (|v_ULTIMATE.start_insert_#res#1_29| Int) (|v_ULTIMATE.start_insert_#in~value#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_29|) |v_ULTIMATE.start_elem_exists_~set#1.offset_29|) |v_ULTIMATE.start_elem_exists_~value#1_32|)) (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) (= (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_main_~#set~0#1.offset_BEFORE_CALL_2| (* |v_ULTIMATE.start_main_~n~0#1_58| 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|)))) |#memory_int|) (= |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))) (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_2|) (or (and (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_2| 0) (= |v_ULTIMATE.start_elem_exists_~i~0#1_39| 0) (<= |v_ULTIMATE.start_elem_exists_~size#1_32| 0)) (and (<= 1 |v_ULTIMATE.start_elem_exists_~size#1_32|) (= |v_ULTIMATE.start_elem_exists_~i~0#1_39| 0) (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_2| 1))) (= (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|)))))' at error location [2023-11-23 21:31:47,721 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:31:47,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:31:47,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-23 21:31:47,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365815225] [2023-11-23 21:31:47,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:31:47,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:31:47,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:47,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:31:47,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=319, Unknown=9, NotChecked=0, Total=380 [2023-11-23 21:31:47,724 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) [2023-11-23 21:31:47,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:47,819 INFO L93 Difference]: Finished difference Result 66 states and 89 transitions. [2023-11-23 21:31:47,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:31:47,819 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 [2023-11-23 21:31:47,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:47,820 INFO L225 Difference]: With dead ends: 66 [2023-11-23 21:31:47,820 INFO L226 Difference]: Without dead ends: 47 [2023-11-23 21:31:47,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=52, Invalid=319, Unknown=9, NotChecked=0, Total=380 [2023-11-23 21:31:47,822 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 [2023-11-23 21:31:47,822 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] [2023-11-23 21:31:47,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-23 21:31:47,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2023-11-23 21:31:47,832 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) [2023-11-23 21:31:47,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 58 transitions. [2023-11-23 21:31:47,833 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 58 transitions. Word has length 23 [2023-11-23 21:31:47,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:47,834 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 58 transitions. [2023-11-23 21:31:47,834 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) [2023-11-23 21:31:47,834 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 58 transitions. [2023-11-23 21:31:47,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-23 21:31:47,836 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:47,836 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:47,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 21:31:48,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:48,064 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:48,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:48,065 INFO L85 PathProgramCache]: Analyzing trace with hash 2101592878, now seen corresponding path program 3 times [2023-11-23 21:31:48,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:48,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123164435] [2023-11-23 21:31:48,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:48,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:48,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:48,320 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-23 21:31:48,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:48,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123164435] [2023-11-23 21:31:48,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123164435] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:31:48,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925367097] [2023-11-23 21:31:48,321 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 21:31:48,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:48,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:48,323 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:31:48,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 21:31:48,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 21:31:48,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:31:48,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 21:31:48,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:48,494 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-23 21:31:48,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:31:48,591 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-23 21:31:48,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925367097] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:31:48,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1091281320] [2023-11-23 21:31:48,594 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-23 21:31:48,594 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:31:48,594 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:31:48,594 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:31:48,595 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:31:49,377 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 110 for LOIs [2023-11-23 21:31:49,466 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:32:05,716 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1471#(and (exists ((|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_main_~n~0#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_elem_exists_~size#1_44| 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_~set#1.offset_41| Int) (|v_ULTIMATE.start_insert_#res#1_37| Int) (|v_ULTIMATE.start_elem_exists_~value#1_44| 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_insert_#res#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_#t~ret15#1_46| Int) (|v_ULTIMATE.start_elem_exists_~i~0#1_51| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_41| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_38| Int) (|v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_3| Int)) (and (or (and (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_3| 1) (= |v_ULTIMATE.start_elem_exists_~i~0#1_51| 0) (<= 1 |v_ULTIMATE.start_elem_exists_~size#1_44|)) (and (= |v_ULTIMATE.start_elem_exists_~i~0#1_51| 0) (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_3| 0) (<= |v_ULTIMATE.start_elem_exists_~size#1_44| 0))) (<= 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 (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_3| 0) (= |v_ULTIMATE.start_elem_exists_~value#1_44| (select (select |v_#memory_int_98| |v_ULTIMATE.start_elem_exists_~set#1.base_41|) |v_ULTIMATE.start_elem_exists_~set#1.offset_41|))) (or (and (= |#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| (* |v_ULTIMATE.start_main_~n~0#1_66| 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|))))) (<= |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|)) (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)))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-23 21:32:05,716 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:32:05,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:32:05,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-23 21:32:05,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405452171] [2023-11-23 21:32:05,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:32:05,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-23 21:32:05,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:32:05,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-23 21:32:05,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=477, Unknown=9, NotChecked=0, Total=650 [2023-11-23 21:32:05,719 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) [2023-11-23 21:32:05,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:32:05,879 INFO L93 Difference]: Finished difference Result 130 states and 181 transitions. [2023-11-23 21:32:05,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 21:32:05,879 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 [2023-11-23 21:32:05,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:32:05,881 INFO L225 Difference]: With dead ends: 130 [2023-11-23 21:32:05,881 INFO L226 Difference]: Without dead ends: 91 [2023-11-23 21:32:05,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=164, Invalid=477, Unknown=9, NotChecked=0, Total=650 [2023-11-23 21:32:05,882 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, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:32:05,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 23 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:32:05,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-11-23 21:32:05,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 51. [2023-11-23 21:32:05,896 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) [2023-11-23 21:32:05,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2023-11-23 21:32:05,897 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 32 [2023-11-23 21:32:05,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:32:05,897 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2023-11-23 21:32:05,897 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) [2023-11-23 21:32:05,897 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2023-11-23 21:32:05,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-23 21:32:05,899 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:32:05,899 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:32:05,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 21:32:06,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:32:06,112 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:32:06,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:32:06,112 INFO L85 PathProgramCache]: Analyzing trace with hash -987236594, now seen corresponding path program 4 times [2023-11-23 21:32:06,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:32:06,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558921596] [2023-11-23 21:32:06,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:32:06,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:32:06,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:32:06,416 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-23 21:32:06,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:32:06,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558921596] [2023-11-23 21:32:06,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558921596] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:32:06,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871235214] [2023-11-23 21:32:06,417 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-23 21:32:06,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:32:06,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:32:06,419 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:32:06,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 21:32:06,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:32:06,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 21:32:06,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:32:06,579 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-23 21:32:06,579 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:32:06,889 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-23 21:32:06,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871235214] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:32:06,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [458045158] [2023-11-23 21:32:06,892 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-23 21:32:06,892 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:32:06,893 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:32:06,893 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:32:06,893 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:32:07,611 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 110 for LOIs [2023-11-23 21:32:07,680 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:32:09,993 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_56| 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_elem_exists_~i~0#1_63| 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_53| Int) (|v_ULTIMATE.start_insert_#in~set#1.offset_46| Int) (|v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_4| Int) (|v_#memory_int_126| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~n~0#1_74| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_insert_~value#1_47| Int) (|v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_#t~mem14#1_56| Int) (|v_ULTIMATE.start_insert_~set#1.offset_47| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_insert_#in~size#1_46| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_53| Int) (|v_ULTIMATE.start_elem_exists_~size#1_56| 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|) (or (< |v_ULTIMATE.start_elem_exists_~size#1_56| 1) (= (select (select |v_#memory_int_126| |v_ULTIMATE.start_elem_exists_~set#1.base_53|) |v_ULTIMATE.start_elem_exists_~set#1.offset_53|) |v_ULTIMATE.start_elem_exists_~value#1_56|)) (or (and (= |v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_4| |v_ULTIMATE.start_insert_~set#1.base_47|) (= |v_ULTIMATE.start_insert_#in~set#1.base_46| |v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_4|) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_4| |v_ULTIMATE.start_main_~n~0#1_74|) (= |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|)) (and (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_4| (+ |v_ULTIMATE.start_main_~n~0#1_74| 1)) (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_4| 0) (= |#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| (* |v_ULTIMATE.start_main_~n~0#1_74| 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_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))) (<= 2 |v_ULTIMATE.start_main_~n~0#1_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|) (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))) (or (and (<= |v_ULTIMATE.start_elem_exists_~size#1_56| 0) (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_4| 0) (= |v_ULTIMATE.start_elem_exists_~i~0#1_63| 0)) (and (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_4| 1) (<= 1 |v_ULTIMATE.start_elem_exists_~size#1_56|) (= |v_ULTIMATE.start_elem_exists_~i~0#1_63| 0))))))' at error location [2023-11-23 21:32:09,993 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:32:09,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:32:09,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-11-23 21:32:09,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667336909] [2023-11-23 21:32:09,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:32:09,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-23 21:32:09,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:32:09,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-23 21:32:09,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=446, Invalid=951, Unknown=9, NotChecked=0, Total=1406 [2023-11-23 21:32:09,996 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) [2023-11-23 21:32:10,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:32:10,366 INFO L93 Difference]: Finished difference Result 190 states and 271 transitions. [2023-11-23 21:32:10,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-23 21:32:10,366 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 [2023-11-23 21:32:10,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:32:10,368 INFO L225 Difference]: With dead ends: 190 [2023-11-23 21:32:10,368 INFO L226 Difference]: Without dead ends: 151 [2023-11-23 21:32:10,370 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 [2023-11-23 21:32:10,370 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 [2023-11-23 21:32:10,371 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] [2023-11-23 21:32:10,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-11-23 21:32:10,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 63. [2023-11-23 21:32:10,391 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) [2023-11-23 21:32:10,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2023-11-23 21:32:10,392 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 38 [2023-11-23 21:32:10,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:32:10,392 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2023-11-23 21:32:10,393 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) [2023-11-23 21:32:10,393 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2023-11-23 21:32:10,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-23 21:32:10,394 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:32:10,395 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:32:10,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 21:32:10,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a7f4960-decc-4274-9e17-77e8118f45be/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-23 21:32:10,616 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:32:10,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:32:10,617 INFO L85 PathProgramCache]: Analyzing trace with hash 404956878, now seen corresponding path program 5 times [2023-11-23 21:32:10,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:32:10,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456531783] [2023-11-23 21:32:10,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:32:10,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:32:10,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat