./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cae1888d2d961d86748cda3b827a90e6d152bf2b6038710fc1a5581289f20b0c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:13:39,900 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:13:40,014 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:13:40,026 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:13:40,027 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:13:40,068 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:13:40,069 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:13:40,069 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:13:40,071 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:13:40,077 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:13:40,077 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:13:40,078 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:13:40,078 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:13:40,079 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:13:40,080 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:13:40,080 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:13:40,081 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:13:40,081 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:13:40,082 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:13:40,082 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:13:40,083 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:13:40,084 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:13:40,084 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:13:40,085 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:13:40,085 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:13:40,086 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:13:40,086 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:13:40,087 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:13:40,087 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:13:40,088 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:13:40,088 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:13:40,088 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:13:40,089 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:13:40,089 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:13:40,089 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:13:40,090 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:13:40,090 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:13:40,090 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:13:40,091 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:13:40,091 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:13:40,091 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:13:40,092 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:13:40,092 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:13:40,092 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:13:40,093 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:13:40,093 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_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cae1888d2d961d86748cda3b827a90e6d152bf2b6038710fc1a5581289f20b0c [2023-11-19 05:13:40,428 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:13:40,453 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:13:40,456 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:13:40,458 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:13:40,458 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:13:40,460 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i [2023-11-19 05:13:44,011 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:13:44,294 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:13:44,295 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i [2023-11-19 05:13:44,306 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/data/d04748708/1b1eb2ff275f4116981f7719125bb38d/FLAGe453daee2 [2023-11-19 05:13:44,325 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/data/d04748708/1b1eb2ff275f4116981f7719125bb38d [2023-11-19 05:13:44,329 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:13:44,331 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:13:44,333 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:13:44,334 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:13:44,341 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:13:44,342 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:13:44" (1/1) ... [2023-11-19 05:13:44,344 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66a774d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:44, skipping insertion in model container [2023-11-19 05:13:44,344 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:13:44" (1/1) ... [2023-11-19 05:13:44,388 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:13:44,581 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_78a09f27-f998-405a-89be-4e9d9e09c202/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i[823,836] [2023-11-19 05:13:44,612 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:13:44,624 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:13:44,641 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_78a09f27-f998-405a-89be-4e9d9e09c202/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i[823,836] [2023-11-19 05:13:44,666 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:13:44,689 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:13:44,689 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:44 WrapperNode [2023-11-19 05:13:44,689 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:13:44,691 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:13:44,691 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:13:44,691 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:13:44,701 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:44" (1/1) ... [2023-11-19 05:13:44,711 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:44" (1/1) ... [2023-11-19 05:13:44,742 INFO L138 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 116 [2023-11-19 05:13:44,743 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:13:44,744 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:13:44,744 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:13:44,745 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:13:44,756 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:44" (1/1) ... [2023-11-19 05:13:44,756 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:44" (1/1) ... [2023-11-19 05:13:44,760 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:44" (1/1) ... [2023-11-19 05:13:44,760 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:44" (1/1) ... [2023-11-19 05:13:44,768 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:44" (1/1) ... [2023-11-19 05:13:44,774 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:44" (1/1) ... [2023-11-19 05:13:44,776 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:44" (1/1) ... [2023-11-19 05:13:44,778 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:44" (1/1) ... [2023-11-19 05:13:44,781 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:13:44,782 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:13:44,782 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:13:44,783 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:13:44,784 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:44" (1/1) ... [2023-11-19 05:13:44,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:13:44,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:13:44,826 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:13:44,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:13:44,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:13:44,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:13:44,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 05:13:44,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 05:13:44,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:13:44,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:13:44,872 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 05:13:44,872 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-19 05:13:44,872 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-19 05:13:44,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 05:13:44,971 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:13:44,974 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:13:45,255 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:13:45,369 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:13:45,369 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-11-19 05:13:45,375 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:13:45 BoogieIcfgContainer [2023-11-19 05:13:45,375 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:13:45,378 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:13:45,379 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:13:45,383 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:13:45,383 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:13:44" (1/3) ... [2023-11-19 05:13:45,384 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d439797 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:13:45, skipping insertion in model container [2023-11-19 05:13:45,385 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:44" (2/3) ... [2023-11-19 05:13:45,385 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d439797 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:13:45, skipping insertion in model container [2023-11-19 05:13:45,385 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:13:45" (3/3) ... [2023-11-19 05:13:45,387 INFO L112 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_2_ground.i [2023-11-19 05:13:45,412 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:13:45,412 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:13:45,471 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:13:45,481 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;@1f9c985e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:13:45,481 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:13:45,487 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 05:13:45,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-19 05:13:45,497 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:13:45,498 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:13:45,499 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:13:45,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:13:45,506 INFO L85 PathProgramCache]: Analyzing trace with hash 2132052571, now seen corresponding path program 1 times [2023-11-19 05:13:45,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:13:45,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710551521] [2023-11-19 05:13:45,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:13:45,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:13:45,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:13:45,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:13:45,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:13:45,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710551521] [2023-11-19 05:13:45,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710551521] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:13:45,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:13:45,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:13:45,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041044820] [2023-11-19 05:13:45,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:13:45,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:13:45,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:13:45,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:13:45,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:13:45,825 INFO L87 Difference]: Start difference. First operand has 22 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:13:45,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:13:45,939 INFO L93 Difference]: Finished difference Result 52 states and 84 transitions. [2023-11-19 05:13:45,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:13:45,942 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-19 05:13:45,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:13:45,953 INFO L225 Difference]: With dead ends: 52 [2023-11-19 05:13:45,953 INFO L226 Difference]: Without dead ends: 31 [2023-11-19 05:13:45,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:13:45,962 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 10 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:13:45,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 26 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:13:45,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-19 05:13:46,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2023-11-19 05:13:46,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 05:13:46,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 32 transitions. [2023-11-19 05:13:46,064 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 32 transitions. Word has length 9 [2023-11-19 05:13:46,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:13:46,064 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 32 transitions. [2023-11-19 05:13:46,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:13:46,065 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 32 transitions. [2023-11-19 05:13:46,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-19 05:13:46,066 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:13:46,066 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:13:46,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:13:46,067 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:13:46,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:13:46,068 INFO L85 PathProgramCache]: Analyzing trace with hash -353696715, now seen corresponding path program 1 times [2023-11-19 05:13:46,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:13:46,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496079857] [2023-11-19 05:13:46,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:13:46,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:13:46,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:13:46,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:13:46,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:13:46,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496079857] [2023-11-19 05:13:46,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496079857] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:13:46,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999384028] [2023-11-19 05:13:46,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:13:46,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:13:46,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:13:46,308 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:13:46,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:13:46,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:13:46,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:13:46,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:13:46,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:13:46,439 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:13:46,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:13:46,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999384028] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:13:46,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1746604624] [2023-11-19 05:13:46,506 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-19 05:13:46,507 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:13:46,512 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:13:46,520 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:13:46,522 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:13:46,891 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:13:46,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1746604624] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:13:46,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:13:46,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 9 [2023-11-19 05:13:46,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390175861] [2023-11-19 05:13:46,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:13:46,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:13:46,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:13:46,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:13:46,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2023-11-19 05:13:46,948 INFO L87 Difference]: Start difference. First operand 23 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:13:47,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:13:47,062 INFO L93 Difference]: Finished difference Result 51 states and 75 transitions. [2023-11-19 05:13:47,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:13:47,063 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (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 11 [2023-11-19 05:13:47,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:13:47,064 INFO L225 Difference]: With dead ends: 51 [2023-11-19 05:13:47,064 INFO L226 Difference]: Without dead ends: 32 [2023-11-19 05:13:47,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2023-11-19 05:13:47,067 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 35 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:13:47,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 18 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:13:47,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-19 05:13:47,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2023-11-19 05:13:47,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 05:13:47,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 33 transitions. [2023-11-19 05:13:47,081 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 33 transitions. Word has length 11 [2023-11-19 05:13:47,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:13:47,081 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 33 transitions. [2023-11-19 05:13:47,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:13:47,082 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 33 transitions. [2023-11-19 05:13:47,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-19 05:13:47,100 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:13:47,100 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:13:47,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 05:13:47,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:13:47,323 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:13:47,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:13:47,324 INFO L85 PathProgramCache]: Analyzing trace with hash 777080389, now seen corresponding path program 1 times [2023-11-19 05:13:47,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:13:47,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565488246] [2023-11-19 05:13:47,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:13:47,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:13:47,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:13:47,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:13:47,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:13:47,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565488246] [2023-11-19 05:13:47,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565488246] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:13:47,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800407741] [2023-11-19 05:13:47,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:13:47,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:13:47,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:13:47,505 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:13:47,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:13:47,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:13:47,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:13:47,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:13:47,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:13:47,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:13:47,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:13:47,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800407741] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:13:47,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1927806300] [2023-11-19 05:13:47,633 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-19 05:13:47,633 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:13:47,634 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:13:47,634 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:13:47,634 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:13:47,982 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 41 for LOIs [2023-11-19 05:13:48,022 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:13:48,416 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '413#(and (exists ((|v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_1| Int)) (and (<= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_1|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_1| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_1| 4))) 1) (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_1|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_1| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_1| 4) (- 4)))) (or (= |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_1| (+ |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_1| 1)) (exists ((|v_#memory_int_38| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_38| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_1| (store (store (select |v_#memory_int_38| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_1|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_1| (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_1| 4)) (select (select |v_#memory_int_38| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_1|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_1| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_1| 4) (- 4)))) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_1| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_1| 4) (- 4)) (select (select |v_#memory_int_38| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_1|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_1| (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_1| 4)))))))) (<= |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_1| 1))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-19 05:13:48,416 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:13:48,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:13:48,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-19 05:13:48,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052355305] [2023-11-19 05:13:48,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:13:48,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:13:48,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:13:48,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:13:48,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-11-19 05:13:48,421 INFO L87 Difference]: Start difference. First operand 24 states and 33 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:13:48,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:13:48,614 INFO L93 Difference]: Finished difference Result 75 states and 116 transitions. [2023-11-19 05:13:48,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:13:48,615 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 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 12 [2023-11-19 05:13:48,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:13:48,616 INFO L225 Difference]: With dead ends: 75 [2023-11-19 05:13:48,617 INFO L226 Difference]: Without dead ends: 54 [2023-11-19 05:13:48,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-11-19 05:13:48,620 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 87 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:13:48,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 24 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:13:48,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-19 05:13:48,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-11-19 05:13:48,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 43 states have internal predecessors, (63), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-19 05:13:48,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 81 transitions. [2023-11-19 05:13:48,645 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 81 transitions. Word has length 12 [2023-11-19 05:13:48,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:13:48,646 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 81 transitions. [2023-11-19 05:13:48,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:13:48,646 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 81 transitions. [2023-11-19 05:13:48,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-19 05:13:48,647 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:13:48,648 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:13:48,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:13:48,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:13:48,869 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:13:48,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:13:48,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1355145570, now seen corresponding path program 2 times [2023-11-19 05:13:48,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:13:48,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906703924] [2023-11-19 05:13:48,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:13:48,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:13:48,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:13:49,091 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 05:13:49,091 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:13:49,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906703924] [2023-11-19 05:13:49,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906703924] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:13:49,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632869993] [2023-11-19 05:13:49,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 05:13:49,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:13:49,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:13:49,096 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:13:49,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:13:49,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 05:13:49,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:13:49,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 05:13:49,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:13:49,210 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 05:13:49,210 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:13:49,247 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 05:13:49,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632869993] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:13:49,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1874015299] [2023-11-19 05:13:49,254 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-19 05:13:49,254 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:13:49,255 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:13:49,255 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:13:49,255 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:13:49,520 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-11-19 05:13:49,555 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:13:49,942 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '735#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_2| Int)) (and (<= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_2|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_2| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_2| 4) 4)) 1) (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_2|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_2| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_2| 4)))) (or (= |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_2| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_2|) (exists ((|v_#memory_int_43| (Array Int (Array Int Int)))) (= (store |v_#memory_int_43| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_2| (store (store (select |v_#memory_int_43| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_2|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_2| (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_2| 4)) (select (select |v_#memory_int_43| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_2|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_2| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_2| 4)))) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_2| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_2| 4)) (select (select |v_#memory_int_43| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_2|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_2| (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_2| 4))))) |#memory_int|))) (<= |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_2| 0))))' at error location [2023-11-19 05:13:49,942 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:13:49,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:13:49,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-19 05:13:49,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032346319] [2023-11-19 05:13:49,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:13:49,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 05:13:49,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:13:49,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 05:13:49,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=244, Unknown=4, NotChecked=0, Total=306 [2023-11-19 05:13:49,945 INFO L87 Difference]: Start difference. First operand 54 states and 81 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:13:50,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:13:50,227 INFO L93 Difference]: Finished difference Result 106 states and 165 transitions. [2023-11-19 05:13:50,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 05:13:50,231 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-19 05:13:50,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:13:50,233 INFO L225 Difference]: With dead ends: 106 [2023-11-19 05:13:50,233 INFO L226 Difference]: Without dead ends: 61 [2023-11-19 05:13:50,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=436, Unknown=4, NotChecked=0, Total=552 [2023-11-19 05:13:50,235 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 54 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:13:50,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 65 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:13:50,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-19 05:13:50,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-11-19 05:13:50,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 50 states have (on average 1.4) internal successors, (70), 50 states have internal predecessors, (70), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-19 05:13:50,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 88 transitions. [2023-11-19 05:13:50,254 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 88 transitions. Word has length 15 [2023-11-19 05:13:50,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:13:50,254 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 88 transitions. [2023-11-19 05:13:50,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:13:50,255 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 88 transitions. [2023-11-19 05:13:50,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-19 05:13:50,256 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:13:50,256 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:13:50,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 05:13:50,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:13:50,479 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:13:50,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:13:50,480 INFO L85 PathProgramCache]: Analyzing trace with hash 201502012, now seen corresponding path program 3 times [2023-11-19 05:13:50,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:13:50,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918486477] [2023-11-19 05:13:50,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:13:50,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:13:50,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:13:50,692 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 05:13:50,692 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:13:50,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918486477] [2023-11-19 05:13:50,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918486477] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:13:50,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043686578] [2023-11-19 05:13:50,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 05:13:50,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:13:50,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:13:50,694 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:13:50,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 05:13:50,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 05:13:50,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:13:50,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 05:13:50,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:13:50,804 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 05:13:50,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:13:50,874 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 05:13:50,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043686578] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:13:50,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [419244296] [2023-11-19 05:13:50,877 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-19 05:13:50,877 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:13:50,878 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:13:50,878 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:13:50,878 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:13:51,084 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 41 for LOIs [2023-11-19 05:13:51,106 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:13:51,472 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1160#(and (exists ((|v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_3| Int)) (and (<= |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_3| 1) (or (= |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_3| (+ |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_3| 1)) (exists ((|v_#memory_int_52| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_52| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_3| (store (store (select |v_#memory_int_52| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_3|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_3| (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_3| 4)) (select (select |v_#memory_int_52| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_3|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_3| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_3| 4) (- 4)))) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_3| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_3| 4) (- 4)) (select (select |v_#memory_int_52| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_3|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_3| (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_3| 4)))))))) (<= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_3|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_3| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_3| 4))) 1) (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_3|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_3| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_3| 4) (- 4)))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-19 05:13:51,472 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:13:51,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:13:51,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-19 05:13:51,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810215473] [2023-11-19 05:13:51,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:13:51,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 05:13:51,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:13:51,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 05:13:51,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=286, Unknown=4, NotChecked=0, Total=420 [2023-11-19 05:13:51,475 INFO L87 Difference]: Start difference. First operand 61 states and 88 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:13:51,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:13:51,867 INFO L93 Difference]: Finished difference Result 182 states and 283 transitions. [2023-11-19 05:13:51,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 05:13:51,868 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 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 18 [2023-11-19 05:13:51,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:13:51,870 INFO L225 Difference]: With dead ends: 182 [2023-11-19 05:13:51,870 INFO L226 Difference]: Without dead ends: 127 [2023-11-19 05:13:51,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=130, Invalid=286, Unknown=4, NotChecked=0, Total=420 [2023-11-19 05:13:51,873 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 207 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:13:51,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 46 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:13:51,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-11-19 05:13:51,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2023-11-19 05:13:51,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 104 states have (on average 1.4230769230769231) internal successors, (148), 104 states have internal predecessors, (148), 21 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-11-19 05:13:51,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 190 transitions. [2023-11-19 05:13:51,907 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 190 transitions. Word has length 18 [2023-11-19 05:13:51,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:13:51,908 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 190 transitions. [2023-11-19 05:13:51,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:13:51,908 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 190 transitions. [2023-11-19 05:13:51,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-19 05:13:51,909 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:13:51,910 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:13:51,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 05:13:52,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:13:52,132 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:13:52,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:13:52,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1352899228, now seen corresponding path program 4 times [2023-11-19 05:13:52,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:13:52,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357189727] [2023-11-19 05:13:52,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:13:52,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:13:52,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:13:52,436 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 05:13:52,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:13:52,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357189727] [2023-11-19 05:13:52,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357189727] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:13:52,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710927232] [2023-11-19 05:13:52,437 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 05:13:52,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:13:52,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:13:52,439 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:13:52,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 05:13:52,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:13:52,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 05:13:52,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:13:52,572 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 05:13:52,572 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:13:52,830 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 05:13:52,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710927232] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:13:52,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [371865314] [2023-11-19 05:13:52,833 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-19 05:13:52,833 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:13:52,834 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:13:52,834 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:13:52,835 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:13:53,024 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 41 for LOIs [2023-11-19 05:13:53,045 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:13:53,429 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1881#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_4| Int)) (and (<= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_4|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_4| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_4| 4))) 1) (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_4|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_4| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_4| 4) (- 4)))) (<= |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_4| 1) (or (exists ((|v_#memory_int_67| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_67| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_4| (store (store (select |v_#memory_int_67| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_4|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_4| (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_4| 4)) (select (select |v_#memory_int_67| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_4|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_4| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_4| 4) (- 4)))) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_4| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_4| 4) (- 4)) (select (select |v_#memory_int_67| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_4|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_4| (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_4| 4))))))) (= |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_4| (+ |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_4| 1))))))' at error location [2023-11-19 05:13:53,429 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:13:53,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:13:53,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-11-19 05:13:53,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153864193] [2023-11-19 05:13:53,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:13:53,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-19 05:13:53,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:13:53,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-19 05:13:53,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=666, Unknown=2, NotChecked=0, Total=1056 [2023-11-19 05:13:53,432 INFO L87 Difference]: Start difference. First operand 127 states and 190 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:13:54,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:13:54,098 INFO L93 Difference]: Finished difference Result 374 states and 595 transitions. [2023-11-19 05:13:54,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-19 05:13:54,099 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 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 24 [2023-11-19 05:13:54,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:13:54,102 INFO L225 Difference]: With dead ends: 374 [2023-11-19 05:13:54,102 INFO L226 Difference]: Without dead ends: 259 [2023-11-19 05:13:54,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=388, Invalid=666, Unknown=2, NotChecked=0, Total=1056 [2023-11-19 05:13:54,112 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 516 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:13:54,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [560 Valid, 68 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:13:54,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2023-11-19 05:13:54,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2023-11-19 05:13:54,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 212 states have (on average 1.4339622641509433) internal successors, (304), 212 states have internal predecessors, (304), 45 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2023-11-19 05:13:54,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 394 transitions. [2023-11-19 05:13:54,184 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 394 transitions. Word has length 24 [2023-11-19 05:13:54,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:13:54,185 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 394 transitions. [2023-11-19 05:13:54,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:13:54,185 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 394 transitions. [2023-11-19 05:13:54,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-19 05:13:54,187 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:13:54,187 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:13:54,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 05:13:54,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:13:54,408 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:13:54,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:13:54,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1422074532, now seen corresponding path program 5 times [2023-11-19 05:13:54,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:13:54,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150886211] [2023-11-19 05:13:54,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:13:54,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:13:54,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:13:55,184 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 05:13:55,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:13:55,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150886211] [2023-11-19 05:13:55,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150886211] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:13:55,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795931066] [2023-11-19 05:13:55,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 05:13:55,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:13:55,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:13:55,190 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:13:55,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 05:13:55,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 05:13:55,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:13:55,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 05:13:55,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:13:55,414 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-11-19 05:13:55,414 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:13:55,567 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-11-19 05:13:55,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795931066] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:13:55,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [976988352] [2023-11-19 05:13:55,570 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-19 05:13:55,571 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:13:55,571 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:13:55,571 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:13:55,571 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:13:55,746 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-11-19 05:13:55,785 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:13:56,274 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3274#(and (exists ((|v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_5| Int)) (and (<= |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_5| 0) (<= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_5|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_5| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_5| 4) 4)) 1) (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_5|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_5| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_5| 4)))) (or (= |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_5| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_5|) (exists ((|v_#memory_int_72| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_72| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_5| (store (store (select |v_#memory_int_72| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_5|) (+ (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_5| 4) |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_5|) (select (select |v_#memory_int_72| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_5|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_5| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_5| 4)))) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_5| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_5| 4)) (select (select |v_#memory_int_72| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_5|) (+ (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_5| 4) |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_5|))))))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-19 05:13:56,275 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:13:56,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:13:56,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 8, 8] total 37 [2023-11-19 05:13:56,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763087416] [2023-11-19 05:13:56,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:13:56,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-19 05:13:56,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:13:56,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-19 05:13:56,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=510, Invalid=1468, Unknown=2, NotChecked=0, Total=1980 [2023-11-19 05:13:56,278 INFO L87 Difference]: Start difference. First operand 259 states and 394 transitions. Second operand has 37 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:03,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:03,145 INFO L93 Difference]: Finished difference Result 632 states and 1030 transitions. [2023-11-19 05:14:03,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2023-11-19 05:14:03,146 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 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 36 [2023-11-19 05:14:03,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:03,150 INFO L225 Difference]: With dead ends: 632 [2023-11-19 05:14:03,151 INFO L226 Difference]: Without dead ends: 397 [2023-11-19 05:14:03,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10512 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=9270, Invalid=22948, Unknown=2, NotChecked=0, Total=32220 [2023-11-19 05:14:03,168 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 1038 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1086 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:03,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1086 Valid, 75 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 05:14:03,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2023-11-19 05:14:03,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 388. [2023-11-19 05:14:03,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 337 states have (on average 1.2967359050445104) internal successors, (437), 337 states have internal predecessors, (437), 49 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2023-11-19 05:14:03,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 535 transitions. [2023-11-19 05:14:03,248 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 535 transitions. Word has length 36 [2023-11-19 05:14:03,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:03,249 INFO L495 AbstractCegarLoop]: Abstraction has 388 states and 535 transitions. [2023-11-19 05:14:03,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:03,249 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 535 transitions. [2023-11-19 05:14:03,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-19 05:14:03,256 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:03,256 INFO L195 NwaCegarLoop]: trace histogram [24, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:14:03,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 05:14:03,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 05:14:03,469 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:14:03,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:03,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1340318012, now seen corresponding path program 6 times [2023-11-19 05:14:03,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:03,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020362573] [2023-11-19 05:14:03,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:03,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:03,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:04,473 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-19 05:14:04,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:04,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020362573] [2023-11-19 05:14:04,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020362573] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:14:04,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850018994] [2023-11-19 05:14:04,474 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 05:14:04,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:14:04,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:14:04,476 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:14:04,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 05:14:04,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 05:14:04,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:14:04,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-19 05:14:04,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:14:04,699 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-19 05:14:04,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:14:05,843 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-19 05:14:05,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850018994] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:14:05,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1603864699] [2023-11-19 05:14:05,846 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-19 05:14:05,846 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:14:05,846 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:14:05,847 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:14:05,847 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:14:06,058 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 41 for LOIs [2023-11-19 05:14:06,076 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:14:06,562 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5741#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_6| Int)) (and (or (= |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_6| (+ |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_6| 1)) (exists ((|v_#memory_int_101| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_101| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_6| (store (store (select |v_#memory_int_101| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_6|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_6| (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_6| 4)) (select (select |v_#memory_int_101| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_6|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_6| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_6| 4) (- 4)))) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_6| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_6| 4) (- 4)) (select (select |v_#memory_int_101| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_6|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_6| (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_6| 4)))))))) (<= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_6|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_6| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_6| 4))) 1) (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_6|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_6| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_6| 4) (- 4)))) (<= |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_6| 1))))' at error location [2023-11-19 05:14:06,562 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:14:06,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:14:06,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 52 [2023-11-19 05:14:06,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052621867] [2023-11-19 05:14:06,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:14:06,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-19 05:14:06,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:06,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-19 05:14:06,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1550, Invalid=2105, Unknown=5, NotChecked=0, Total=3660 [2023-11-19 05:14:06,568 INFO L87 Difference]: Start difference. First operand 388 states and 535 transitions. Second operand has 53 states, 53 states have (on average 1.169811320754717) internal successors, (62), 52 states have internal predecessors, (62), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:08,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:08,743 INFO L93 Difference]: Finished difference Result 1036 states and 1537 transitions. [2023-11-19 05:14:08,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-19 05:14:08,743 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.169811320754717) internal successors, (62), 52 states have internal predecessors, (62), 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 44 [2023-11-19 05:14:08,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:08,750 INFO L225 Difference]: With dead ends: 1036 [2023-11-19 05:14:08,750 INFO L226 Difference]: Without dead ends: 674 [2023-11-19 05:14:08,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1550, Invalid=2105, Unknown=5, NotChecked=0, Total=3660 [2023-11-19 05:14:08,755 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 1593 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1693 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 1082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:08,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1693 Valid, 57 Invalid, 1082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-19 05:14:08,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2023-11-19 05:14:08,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 674. [2023-11-19 05:14:08,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 571 states have (on average 1.3572679509632224) internal successors, (775), 571 states have internal predecessors, (775), 101 states have call successors, (101), 1 states have call predecessors, (101), 1 states have return successors, (101), 101 states have call predecessors, (101), 101 states have call successors, (101) [2023-11-19 05:14:08,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 977 transitions. [2023-11-19 05:14:08,891 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 977 transitions. Word has length 44 [2023-11-19 05:14:08,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:08,894 INFO L495 AbstractCegarLoop]: Abstraction has 674 states and 977 transitions. [2023-11-19 05:14:08,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.169811320754717) internal successors, (62), 52 states have internal predecessors, (62), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:08,895 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 977 transitions. [2023-11-19 05:14:08,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-19 05:14:08,899 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:08,900 INFO L195 NwaCegarLoop]: trace histogram [50, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:14:08,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 05:14:09,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:14:09,109 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:14:09,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:09,110 INFO L85 PathProgramCache]: Analyzing trace with hash 185718236, now seen corresponding path program 7 times [2023-11-19 05:14:09,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:09,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359073293] [2023-11-19 05:14:09,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:09,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:09,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:11,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-19 05:14:11,717 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:11,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359073293] [2023-11-19 05:14:11,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359073293] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:14:11,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329479430] [2023-11-19 05:14:11,717 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 05:14:11,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:14:11,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:14:11,719 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:14:11,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 05:14:11,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:11,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-19 05:14:11,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:14:12,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-19 05:14:12,066 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:14:15,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-19 05:14:15,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329479430] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:14:15,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1981748128] [2023-11-19 05:14:15,787 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-19 05:14:15,787 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:14:15,788 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:14:15,788 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:14:15,788 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:14:16,011 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-11-19 05:14:16,029 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:14:16,736 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9420#(and (exists ((|v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_7| Int)) (and (or (= |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_7| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_7|) (exists ((|v_#memory_int_156| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_156| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_7| (store (store (select |v_#memory_int_156| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_7|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_7| (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_7| 4)) (select (select |v_#memory_int_156| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_7|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_7| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_7| 4)))) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_7| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_7| 4)) (select (select |v_#memory_int_156| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_7|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_7| (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_7| 4)))))))) (<= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_7|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_7| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_7| 4) 4)) 1) (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_7|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_7| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_7| 4)))) (<= |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_7| 0))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-19 05:14:16,737 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:14:16,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:14:16,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 104 [2023-11-19 05:14:16,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747877789] [2023-11-19 05:14:16,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:14:16,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2023-11-19 05:14:16,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:16,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2023-11-19 05:14:16,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5788, Invalid=6863, Unknown=5, NotChecked=0, Total=12656 [2023-11-19 05:14:16,748 INFO L87 Difference]: Start difference. First operand 674 states and 977 transitions. Second operand has 105 states, 105 states have (on average 1.0857142857142856) internal successors, (114), 104 states have internal predecessors, (114), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:25,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:25,034 INFO L93 Difference]: Finished difference Result 1868 states and 2889 transitions. [2023-11-19 05:14:25,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2023-11-19 05:14:25,035 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.0857142857142856) internal successors, (114), 104 states have internal predecessors, (114), 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 70 [2023-11-19 05:14:25,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:25,047 INFO L225 Difference]: With dead ends: 1868 [2023-11-19 05:14:25,048 INFO L226 Difference]: Without dead ends: 1246 [2023-11-19 05:14:25,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1583 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=5788, Invalid=6863, Unknown=5, NotChecked=0, Total=12656 [2023-11-19 05:14:25,056 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 3304 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 1796 mSolverCounterSat, 529 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3508 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 2325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 529 IncrementalHoareTripleChecker+Valid, 1796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:25,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3508 Valid, 112 Invalid, 2325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [529 Valid, 1796 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-19 05:14:25,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2023-11-19 05:14:25,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 1246. [2023-11-19 05:14:25,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1039 states have (on average 1.3965351299326276) internal successors, (1451), 1039 states have internal predecessors, (1451), 205 states have call successors, (205), 1 states have call predecessors, (205), 1 states have return successors, (205), 205 states have call predecessors, (205), 205 states have call successors, (205) [2023-11-19 05:14:25,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 1861 transitions. [2023-11-19 05:14:25,272 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 1861 transitions. Word has length 70 [2023-11-19 05:14:25,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:25,273 INFO L495 AbstractCegarLoop]: Abstraction has 1246 states and 1861 transitions. [2023-11-19 05:14:25,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.0857142857142856) internal successors, (114), 104 states have internal predecessors, (114), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:25,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 1861 transitions. [2023-11-19 05:14:25,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-11-19 05:14:25,275 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:25,275 INFO L195 NwaCegarLoop]: trace histogram [102, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:14:25,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 05:14:25,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a09f27-f998-405a-89be-4e9d9e09c202/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:14:25,481 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:14:25,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:25,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1547917540, now seen corresponding path program 8 times [2023-11-19 05:14:25,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:25,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181704367] [2023-11-19 05:14:25,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:25,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:25,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat