./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array1_pattern.c --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_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/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_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array1_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/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_010e1db0-9ec4-40f5-a252-b7df1c08d61d/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 f9fbee177c3231db1a1e3277e649158ac81edd180968ad454e1d0751d0f1d4e9 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:15:29,468 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:15:29,626 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:15:29,641 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:15:29,642 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:15:29,696 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:15:29,697 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:15:29,697 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:15:29,699 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:15:29,705 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:15:29,706 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:15:29,707 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:15:29,707 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:15:29,709 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:15:29,710 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:15:29,710 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:15:29,711 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:15:29,711 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:15:29,712 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:15:29,713 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:15:29,713 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:15:29,714 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:15:29,715 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:15:29,716 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:15:29,716 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:15:29,717 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:15:29,718 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:15:29,718 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:15:29,719 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:15:29,719 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:15:29,721 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:15:29,721 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:15:29,722 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:15:29,722 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:15:29,722 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:15:29,722 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:15:29,723 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:15:29,724 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:15:29,724 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:15:29,724 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:15:29,725 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:15:29,725 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:15:29,725 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:15:29,726 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:15:29,726 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:15:29,727 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_010e1db0-9ec4-40f5-a252-b7df1c08d61d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f9fbee177c3231db1a1e3277e649158ac81edd180968ad454e1d0751d0f1d4e9 [2023-11-19 04:15:30,105 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:15:30,132 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:15:30,135 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:15:30,136 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:15:30,137 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:15:30,139 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/array-patterns/array1_pattern.c [2023-11-19 04:15:34,051 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:15:34,399 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:15:34,400 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/sv-benchmarks/c/array-patterns/array1_pattern.c [2023-11-19 04:15:34,411 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/data/bdc156b40/feb4e42103cd49849fb4eca59f7e4741/FLAGa9e974d63 [2023-11-19 04:15:34,432 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/data/bdc156b40/feb4e42103cd49849fb4eca59f7e4741 [2023-11-19 04:15:34,439 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:15:34,443 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:15:34,447 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:15:34,448 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:15:34,455 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:15:34,458 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:15:34" (1/1) ... [2023-11-19 04:15:34,460 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51d0d3cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:34, skipping insertion in model container [2023-11-19 04:15:34,460 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:15:34" (1/1) ... [2023-11-19 04:15:34,498 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:15:34,758 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_010e1db0-9ec4-40f5-a252-b7df1c08d61d/sv-benchmarks/c/array-patterns/array1_pattern.c[1307,1320] [2023-11-19 04:15:34,787 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:15:34,796 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:15:34,811 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_010e1db0-9ec4-40f5-a252-b7df1c08d61d/sv-benchmarks/c/array-patterns/array1_pattern.c[1307,1320] [2023-11-19 04:15:34,824 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:15:34,842 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:15:34,843 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:34 WrapperNode [2023-11-19 04:15:34,843 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:15:34,844 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:15:34,845 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:15:34,845 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:15:34,854 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:34" (1/1) ... [2023-11-19 04:15:34,862 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:34" (1/1) ... [2023-11-19 04:15:34,884 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 78 [2023-11-19 04:15:34,885 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:15:34,886 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:15:34,886 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:15:34,886 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:15:34,898 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:34" (1/1) ... [2023-11-19 04:15:34,898 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:34" (1/1) ... [2023-11-19 04:15:34,901 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:34" (1/1) ... [2023-11-19 04:15:34,902 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:34" (1/1) ... [2023-11-19 04:15:34,909 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:34" (1/1) ... [2023-11-19 04:15:34,913 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:34" (1/1) ... [2023-11-19 04:15:34,914 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:34" (1/1) ... [2023-11-19 04:15:34,916 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:34" (1/1) ... [2023-11-19 04:15:34,918 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:15:34,920 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:15:34,920 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:15:34,920 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:15:34,921 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:34" (1/1) ... [2023-11-19 04:15:34,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:15:34,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:15:34,962 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:15:34,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:15:35,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:15:35,010 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 04:15:35,011 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 04:15:35,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:15:35,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 04:15:35,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 04:15:35,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:15:35,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:15:35,012 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 04:15:35,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 04:15:35,106 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:15:35,110 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:15:35,343 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:15:35,416 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:15:35,429 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-19 04:15:35,435 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:15:35 BoogieIcfgContainer [2023-11-19 04:15:35,435 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:15:35,439 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:15:35,440 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:15:35,449 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:15:35,450 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:15:34" (1/3) ... [2023-11-19 04:15:35,451 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@705db75b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:15:35, skipping insertion in model container [2023-11-19 04:15:35,451 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:34" (2/3) ... [2023-11-19 04:15:35,453 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@705db75b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:15:35, skipping insertion in model container [2023-11-19 04:15:35,454 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:15:35" (3/3) ... [2023-11-19 04:15:35,455 INFO L112 eAbstractionObserver]: Analyzing ICFG array1_pattern.c [2023-11-19 04:15:35,482 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:15:35,484 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:15:35,551 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:15:35,560 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;@7a819618, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:15:35,560 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:15:35,566 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:15:35,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-19 04:15:35,575 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:15:35,576 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:15:35,577 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:15:35,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:15:35,584 INFO L85 PathProgramCache]: Analyzing trace with hash -348000308, now seen corresponding path program 1 times [2023-11-19 04:15:35,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:15:35,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531794082] [2023-11-19 04:15:35,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:15:35,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:15:35,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:15:35,882 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 04:15:35,883 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:15:35,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531794082] [2023-11-19 04:15:35,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531794082] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:15:35,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:15:35,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:15:35,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181439648] [2023-11-19 04:15:35,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:15:35,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 04:15:35,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:15:35,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 04:15:35,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 04:15:35,956 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:15:36,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:15:36,005 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2023-11-19 04:15:36,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 04:15:36,009 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-11-19 04:15:36,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:15:36,018 INFO L225 Difference]: With dead ends: 24 [2023-11-19 04:15:36,018 INFO L226 Difference]: Without dead ends: 15 [2023-11-19 04:15:36,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 04:15:36,026 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:15:36,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:15:36,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-19 04:15:36,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-11-19 04:15:36,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:15:36,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2023-11-19 04:15:36,069 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 11 [2023-11-19 04:15:36,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:15:36,071 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2023-11-19 04:15:36,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:15:36,072 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2023-11-19 04:15:36,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-19 04:15:36,074 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:15:36,074 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:15:36,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:15:36,075 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:15:36,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:15:36,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1400754714, now seen corresponding path program 1 times [2023-11-19 04:15:36,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:15:36,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600920402] [2023-11-19 04:15:36,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:15:36,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:15:36,120 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:15:36,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1257072183] [2023-11-19 04:15:36,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:15:36,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:15:36,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:15:36,124 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:15:36,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:15:36,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:15:36,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 04:15:36,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:15:36,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:15:36,446 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:15:36,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:15:36,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600920402] [2023-11-19 04:15:36,448 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:15:36,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257072183] [2023-11-19 04:15:36,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257072183] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:15:36,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:15:36,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:15:36,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585852372] [2023-11-19 04:15:36,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:15:36,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:15:36,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:15:36,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:15:36,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:15:36,462 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:15:36,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:15:36,534 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2023-11-19 04:15:36,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:15:36,535 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2023-11-19 04:15:36,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:15:36,536 INFO L225 Difference]: With dead ends: 19 [2023-11-19 04:15:36,537 INFO L226 Difference]: Without dead ends: 16 [2023-11-19 04:15:36,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:15:36,539 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:15:36,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 28 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:15:36,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-19 04:15:36,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-11-19 04:15:36,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:15:36,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2023-11-19 04:15:36,548 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 16 [2023-11-19 04:15:36,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:15:36,549 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2023-11-19 04:15:36,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:15:36,550 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2023-11-19 04:15:36,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-19 04:15:36,551 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:15:36,551 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:15:36,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 04:15:36,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:15:36,770 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:15:36,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:15:36,771 INFO L85 PathProgramCache]: Analyzing trace with hash 473487722, now seen corresponding path program 1 times [2023-11-19 04:15:36,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:15:36,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384458409] [2023-11-19 04:15:36,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:15:36,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:15:36,818 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:15:36,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1726281587] [2023-11-19 04:15:36,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:15:36,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:15:36,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:15:36,830 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:15:36,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:15:36,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:15:36,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 04:15:36,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:15:36,998 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:15:36,998 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:15:36,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:15:36,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384458409] [2023-11-19 04:15:36,999 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:15:36,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726281587] [2023-11-19 04:15:37,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726281587] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:15:37,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:15:37,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 04:15:37,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722907494] [2023-11-19 04:15:37,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:15:37,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:15:37,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:15:37,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:15:37,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:15:37,003 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:15:37,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:15:37,110 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2023-11-19 04:15:37,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 04:15:37,111 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2023-11-19 04:15:37,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:15:37,113 INFO L225 Difference]: With dead ends: 29 [2023-11-19 04:15:37,113 INFO L226 Difference]: Without dead ends: 17 [2023-11-19 04:15:37,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:15:37,120 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:15:37,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 30 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:15:37,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-19 04:15:37,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-19 04:15:37,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:15:37,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2023-11-19 04:15:37,138 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 17 [2023-11-19 04:15:37,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:15:37,138 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2023-11-19 04:15:37,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:15:37,140 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2023-11-19 04:15:37,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-19 04:15:37,142 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:15:37,142 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:15:37,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 04:15:37,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:15:37,369 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:15:37,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:15:37,370 INFO L85 PathProgramCache]: Analyzing trace with hash 199414858, now seen corresponding path program 1 times [2023-11-19 04:15:37,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:15:37,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328409881] [2023-11-19 04:15:37,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:15:37,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:15:37,428 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:15:37,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [575321957] [2023-11-19 04:15:37,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:15:37,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:15:37,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:15:37,434 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:15:37,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 04:15:37,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:15:37,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-19 04:15:37,566 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:15:37,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-19 04:15:37,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2023-11-19 04:15:37,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 15 [2023-11-19 04:15:37,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-19 04:15:38,257 INFO L349 Elim1Store]: treesize reduction 51, result has 12.1 percent of original size [2023-11-19 04:15:38,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 28 [2023-11-19 04:15:38,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:15:38,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:15:44,765 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse12 (mod (+ c_~ARR_SIZE~0 4294967295) 4294967296))) (let ((.cse5 (* .cse12 4)) (.cse11 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|))) (and (forall ((v_z_4 Int)) (let ((.cse0 (+ .cse12 v_z_4))) (or (< 6442450943 .cse0) (< .cse0 4294967296) (< 4294967295 v_z_4) (forall ((v_y_4 Int)) (let ((.cse9 (* v_y_4 4294967296)) (.cse10 (* 4294967295 v_z_4))) (let ((.cse8 (+ .cse9 .cse10))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store .cse11 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (* 17179869180 v_z_4) (* 17179869184 v_y_4)) (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| .cse8))))) (let ((.cse3 (select .cse1 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse4 (* v_z_4 4)) (.cse6 (* |c_ULTIMATE.start_main_~num~0#1| .cse8))) (or (= (let ((.cse2 (store .cse3 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse4 .cse5) .cse6))) (+ (select (select (store .cse1 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse2) |c_ULTIMATE.start_main_~#array1~0#1.base|) |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse2 |c_ULTIMATE.start_main_~#array2~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1|)) 0) (= (let ((.cse7 (store .cse3 (+ (- 17179869184) |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse4 .cse5) .cse6))) (+ (select .cse7 |c_ULTIMATE.start_main_~#array2~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1| (select (select (store .cse1 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse7) |c_ULTIMATE.start_main_~#array1~0#1.base|) |c_ULTIMATE.start_main_~#array1~0#1.offset|))) 0) (< .cse8 0) (< c_~ARR_SIZE~0 (+ .cse9 .cse10 1))))))))))) (forall ((v_z_1 Int)) (or (< (+ .cse12 v_z_1) 6442450944) (forall ((v_y_1 Int)) (let ((.cse13 (* 4294967295 v_z_1)) (.cse14 (* v_y_1 4294967296))) (let ((.cse15 (+ .cse13 .cse14))) (or (< c_~ARR_SIZE~0 (+ .cse13 .cse14 1)) (< .cse15 0) (= (let ((.cse16 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store .cse11 (+ (* 17179869180 v_z_1) (* 17179869184 v_y_1) |c_ULTIMATE.start_main_~#array1~0#1.offset|) (* .cse15 |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|))))) (let ((.cse17 (store (select .cse16 |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ (* v_z_1 4) |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse5 (- 34359738368)) (* .cse15 |c_ULTIMATE.start_main_~num~0#1|)))) (+ |c_ULTIMATE.start_main_~sum~0#1| (select (select (store .cse16 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse17) |c_ULTIMATE.start_main_~#array1~0#1.base|) |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse17 |c_ULTIMATE.start_main_~#array2~0#1.offset|)))) 0))))) (< 4294967295 v_z_1))) (forall ((v_z_1 Int)) (let ((.cse27 (+ .cse12 v_z_1))) (or (< v_z_1 0) (forall ((v_y_1 Int)) (let ((.cse18 (* 4294967295 v_z_1)) (.cse19 (* v_y_1 4294967296))) (let ((.cse25 (+ .cse18 .cse19))) (let ((.cse20 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store .cse11 (+ (* 17179869180 v_z_1) (* 17179869184 v_y_1) |c_ULTIMATE.start_main_~#array1~0#1.offset|) (* .cse25 |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|))))) (let ((.cse22 (select .cse20 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse23 (* v_z_1 4)) (.cse24 (* .cse25 |c_ULTIMATE.start_main_~num~0#1|))) (or (< c_~ARR_SIZE~0 (+ .cse18 .cse19 1)) (= (let ((.cse21 (store .cse22 (+ .cse23 (- 17179869184) |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse5) .cse24))) (+ (select (select (store .cse20 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse21) |c_ULTIMATE.start_main_~#array1~0#1.base|) |c_ULTIMATE.start_main_~#array1~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1| (select .cse21 |c_ULTIMATE.start_main_~#array2~0#1.offset|))) 0) (< .cse25 0) (= (let ((.cse26 (store .cse22 (+ .cse23 |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse5 (- 34359738368)) .cse24))) (+ |c_ULTIMATE.start_main_~sum~0#1| (select (select (store .cse20 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse26) |c_ULTIMATE.start_main_~#array1~0#1.base|) |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse26 |c_ULTIMATE.start_main_~#array2~0#1.offset|))) 0))))))) (< .cse27 2147483648) (< 4294967295 .cse27)))) (forall ((v_z_1 Int)) (let ((.cse33 (+ .cse12 v_z_1))) (or (forall ((v_y_1 Int)) (let ((.cse28 (* 4294967295 v_z_1)) (.cse29 (* v_y_1 4294967296))) (let ((.cse32 (+ .cse28 .cse29))) (or (< c_~ARR_SIZE~0 (+ .cse28 .cse29 1)) (= (let ((.cse30 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store .cse11 (+ (* 17179869180 v_z_1) (* 17179869184 v_y_1) |c_ULTIMATE.start_main_~#array1~0#1.offset|) (* .cse32 |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|))))) (let ((.cse31 (store (select .cse30 |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ (* v_z_1 4) (- 17179869184) |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse5) (* .cse32 |c_ULTIMATE.start_main_~num~0#1|)))) (+ (select (select (store .cse30 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse31) |c_ULTIMATE.start_main_~#array1~0#1.base|) |c_ULTIMATE.start_main_~#array1~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1| (select .cse31 |c_ULTIMATE.start_main_~#array2~0#1.offset|)))) 0) (< .cse32 0))))) (< v_z_1 0) (< .cse33 2147483648) (< 4294967295 .cse33)))) (forall ((v_z_4 Int)) (or (< 2147483647 (+ .cse12 v_z_4)) (< v_z_4 0) (forall ((v_y_4 Int)) (let ((.cse41 (* v_y_4 4294967296)) (.cse42 (* 4294967295 v_z_4))) (let ((.cse40 (+ .cse41 .cse42))) (let ((.cse34 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store .cse11 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (* 17179869180 v_z_4) (* 17179869184 v_y_4)) (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| .cse40))))) (let ((.cse36 (select .cse34 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse37 (* v_z_4 4)) (.cse38 (* |c_ULTIMATE.start_main_~num~0#1| .cse40))) (or (= (let ((.cse35 (store .cse36 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse37 .cse5) .cse38))) (+ (select (select (store .cse34 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse35) |c_ULTIMATE.start_main_~#array1~0#1.base|) |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse35 |c_ULTIMATE.start_main_~#array2~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1|)) 0) (= (let ((.cse39 (store .cse36 (+ (- 17179869184) |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse37 .cse5) .cse38))) (+ (select .cse39 |c_ULTIMATE.start_main_~#array2~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1| (select (select (store .cse34 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse39) |c_ULTIMATE.start_main_~#array1~0#1.base|) |c_ULTIMATE.start_main_~#array1~0#1.offset|))) 0) (< .cse40 0) (< c_~ARR_SIZE~0 (+ .cse41 .cse42 1)))))))))) (forall ((v_z_4 Int)) (or (forall ((v_y_4 Int)) (let ((.cse46 (* v_y_4 4294967296)) (.cse47 (* 4294967295 v_z_4))) (let ((.cse45 (+ .cse46 .cse47))) (or (= (let ((.cse43 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store .cse11 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (* 17179869180 v_z_4) (* 17179869184 v_y_4)) (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| .cse45))))) (let ((.cse44 (store (select .cse43 |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| (* v_z_4 4) .cse5) (* |c_ULTIMATE.start_main_~num~0#1| .cse45)))) (+ (select (select (store .cse43 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse44) |c_ULTIMATE.start_main_~#array1~0#1.base|) |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse44 |c_ULTIMATE.start_main_~#array2~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1|))) 0) (< .cse45 0) (< c_~ARR_SIZE~0 (+ .cse46 .cse47 1)))))) (< 2147483647 (+ .cse12 v_z_4)) (< v_z_4 0))) (forall ((v_z_4 Int)) (let ((.cse48 (+ .cse12 v_z_4))) (or (< 6442450943 .cse48) (< .cse48 4294967296) (< 4294967295 v_z_4) (forall ((v_y_4 Int)) (let ((.cse52 (* v_y_4 4294967296)) (.cse53 (* 4294967295 v_z_4))) (let ((.cse51 (+ .cse52 .cse53))) (or (= (let ((.cse50 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store .cse11 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (* 17179869180 v_z_4) (* 17179869184 v_y_4)) (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| .cse51))))) (let ((.cse49 (store (select .cse50 |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ (- 17179869184) |c_ULTIMATE.start_main_~#array2~0#1.offset| (* v_z_4 4) .cse5) (* |c_ULTIMATE.start_main_~num~0#1| .cse51)))) (+ (select .cse49 |c_ULTIMATE.start_main_~#array2~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1| (select (select (store .cse50 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse49) |c_ULTIMATE.start_main_~#array1~0#1.base|) |c_ULTIMATE.start_main_~#array1~0#1.offset|)))) 0) (< .cse51 0) (< c_~ARR_SIZE~0 (+ .cse52 .cse53 1))))))))) (forall ((v_z_1 Int)) (or (< (+ .cse12 v_z_1) 6442450944) (forall ((v_y_1 Int)) (let ((.cse54 (* 4294967295 v_z_1)) (.cse55 (* v_y_1 4294967296))) (let ((.cse61 (+ .cse54 .cse55))) (let ((.cse56 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store .cse11 (+ (* 17179869180 v_z_1) (* 17179869184 v_y_1) |c_ULTIMATE.start_main_~#array1~0#1.offset|) (* .cse61 |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|))))) (let ((.cse58 (select .cse56 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse59 (* v_z_1 4)) (.cse60 (* .cse61 |c_ULTIMATE.start_main_~num~0#1|))) (or (< c_~ARR_SIZE~0 (+ .cse54 .cse55 1)) (= (let ((.cse57 (store .cse58 (+ .cse59 (- 17179869184) |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse5) .cse60))) (+ (select (select (store .cse56 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse57) |c_ULTIMATE.start_main_~#array1~0#1.base|) |c_ULTIMATE.start_main_~#array1~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1| (select .cse57 |c_ULTIMATE.start_main_~#array2~0#1.offset|))) 0) (< .cse61 0) (= (let ((.cse62 (store .cse58 (+ .cse59 |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse5 (- 34359738368)) .cse60))) (+ |c_ULTIMATE.start_main_~sum~0#1| (select (select (store .cse56 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse62) |c_ULTIMATE.start_main_~#array1~0#1.base|) |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse62 |c_ULTIMATE.start_main_~#array2~0#1.offset|))) 0))))))) (< 4294967295 v_z_1)))))) is different from true [2023-11-19 04:15:44,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:15:44,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328409881] [2023-11-19 04:15:44,777 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:15:44,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575321957] [2023-11-19 04:15:44,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575321957] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:15:44,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [142885418] [2023-11-19 04:15:44,806 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-19 04:15:44,807 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:15:44,811 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:15:44,819 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:15:44,820 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:15:45,640 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-11-19 04:15:45,642 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:15:47,507 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '392#(and (<= |ULTIMATE.start_main_~index~0#1| 32766) (= |ULTIMATE.start_main_~temp~0#1| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~index~0#1|) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (<= 2 |ULTIMATE.start_main_~#array1~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 2 |ULTIMATE.start_main_~#array2~0#1.base|) (= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 32767) (<= 1 ~ARR_SIZE~0))' at error location [2023-11-19 04:15:47,507 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:15:47,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:15:47,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-11-19 04:15:47,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880725982] [2023-11-19 04:15:47,508 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-19 04:15:47,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 04:15:47,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:15:47,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 04:15:47,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=4, NotChecked=56, Total=930 [2023-11-19 04:15:47,511 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 14 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:15:48,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:15:48,342 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2023-11-19 04:15:48,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 04:15:48,344 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-11-19 04:15:48,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:15:48,345 INFO L225 Difference]: With dead ends: 40 [2023-11-19 04:15:48,345 INFO L226 Difference]: Without dead ends: 37 [2023-11-19 04:15:48,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=212, Invalid=1194, Unknown=4, NotChecked=72, Total=1482 [2023-11-19 04:15:48,347 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 51 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:15:48,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 66 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:15:48,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-19 04:15:48,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2023-11-19 04:15:48,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 04:15:48,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-11-19 04:15:48,368 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 18 [2023-11-19 04:15:48,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:15:48,368 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-11-19 04:15:48,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:15:48,369 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-11-19 04:15:48,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-19 04:15:48,370 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:15:48,370 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:15:48,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 04:15:48,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:15:48,586 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:15:48,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:15:48,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1886657850, now seen corresponding path program 2 times [2023-11-19 04:15:48,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:15:48,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496522682] [2023-11-19 04:15:48,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:15:48,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:15:48,624 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:15:48,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [927717967] [2023-11-19 04:15:48,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 04:15:48,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:15:48,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:15:48,632 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:15:48,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 04:15:48,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 04:15:48,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:15:48,730 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 04:15:48,732 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:15:48,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:15:48,812 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:15:48,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:15:48,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:15:48,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496522682] [2023-11-19 04:15:48,878 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:15:48,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927717967] [2023-11-19 04:15:48,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927717967] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:15:48,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [841678922] [2023-11-19 04:15:48,881 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-19 04:15:48,882 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:15:48,882 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:15:48,882 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:15:48,883 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:15:49,416 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-11-19 04:15:49,418 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:15:50,536 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '638#(and (<= |ULTIMATE.start_main_~index~0#1| 32766) (= |ULTIMATE.start_main_~temp~0#1| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~index~0#1|) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (<= 2 |ULTIMATE.start_main_~#array1~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 2 |ULTIMATE.start_main_~#array2~0#1.base|) (= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 32767) (<= 1 ~ARR_SIZE~0))' at error location [2023-11-19 04:15:50,536 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:15:50,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 04:15:50,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-11-19 04:15:50,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781034882] [2023-11-19 04:15:50,537 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 04:15:50,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 04:15:50,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:15:50,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 04:15:50,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=348, Unknown=3, NotChecked=0, Total=420 [2023-11-19 04:15:50,539 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 04:15:50,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:15:50,729 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2023-11-19 04:15:50,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 04:15:50,732 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2023-11-19 04:15:50,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:15:50,733 INFO L225 Difference]: With dead ends: 37 [2023-11-19 04:15:50,733 INFO L226 Difference]: Without dead ends: 24 [2023-11-19 04:15:50,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=91, Invalid=458, Unknown=3, NotChecked=0, Total=552 [2023-11-19 04:15:50,735 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 35 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:15:50,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 44 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:15:50,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-19 04:15:50,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2023-11-19 04:15:50,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:15:50,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2023-11-19 04:15:50,748 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 19 [2023-11-19 04:15:50,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:15:50,749 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2023-11-19 04:15:50,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 04:15:50,749 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2023-11-19 04:15:50,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-19 04:15:50,750 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:15:50,750 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:15:50,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 04:15:50,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:15:50,964 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:15:50,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:15:50,964 INFO L85 PathProgramCache]: Analyzing trace with hash 293090666, now seen corresponding path program 3 times [2023-11-19 04:15:50,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:15:50,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225181436] [2023-11-19 04:15:50,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:15:50,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:15:50,995 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:15:51,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1236240569] [2023-11-19 04:15:51,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 04:15:51,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:15:51,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:15:51,003 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:15:51,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 04:15:51,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 04:15:51,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:15:51,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 04:15:51,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:15:51,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:15:51,164 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:15:51,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:15:51,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:15:51,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225181436] [2023-11-19 04:15:51,232 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:15:51,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236240569] [2023-11-19 04:15:51,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236240569] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:15:51,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [893779622] [2023-11-19 04:15:51,236 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-19 04:15:51,236 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:15:51,236 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:15:51,236 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:15:51,237 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:15:51,787 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-11-19 04:15:51,789 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:15:52,938 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '857#(and (<= |ULTIMATE.start_main_~index~0#1| 32766) (= |ULTIMATE.start_main_~temp~0#1| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~index~0#1|) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (<= 2 |ULTIMATE.start_main_~#array1~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 2 |ULTIMATE.start_main_~#array2~0#1.base|) (= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 32767) (<= 1 ~ARR_SIZE~0))' at error location [2023-11-19 04:15:52,938 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:15:52,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 04:15:52,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-11-19 04:15:52,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738418017] [2023-11-19 04:15:52,941 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 04:15:52,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 04:15:52,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:15:52,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 04:15:52,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=342, Unknown=1, NotChecked=0, Total=420 [2023-11-19 04:15:52,945 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 04:15:53,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:15:53,101 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2023-11-19 04:15:53,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 04:15:53,102 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2023-11-19 04:15:53,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:15:53,104 INFO L225 Difference]: With dead ends: 24 [2023-11-19 04:15:53,104 INFO L226 Difference]: Without dead ends: 21 [2023-11-19 04:15:53,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=98, Invalid=453, Unknown=1, NotChecked=0, Total=552 [2023-11-19 04:15:53,105 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:15:53,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 31 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:15:53,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-19 04:15:53,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-19 04:15:53,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:15:53,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2023-11-19 04:15:53,114 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 19 [2023-11-19 04:15:53,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:15:53,114 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2023-11-19 04:15:53,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 04:15:53,114 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2023-11-19 04:15:53,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-19 04:15:53,115 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:15:53,116 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:15:53,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 04:15:53,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 04:15:53,322 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:15:53,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:15:53,322 INFO L85 PathProgramCache]: Analyzing trace with hash 495640602, now seen corresponding path program 4 times [2023-11-19 04:15:53,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:15:53,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301390750] [2023-11-19 04:15:53,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:15:53,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:15:53,349 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:15:53,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1519493124] [2023-11-19 04:15:53,350 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 04:15:53,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:15:53,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:15:53,352 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:15:53,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 04:15:53,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:15:53,488 WARN L260 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 61 conjunts are in the unsatisfiable core [2023-11-19 04:15:53,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:15:53,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-19 04:15:53,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-19 04:15:53,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2023-11-19 04:15:54,529 INFO L349 Elim1Store]: treesize reduction 180, result has 23.4 percent of original size [2023-11-19 04:15:54,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 9 new quantified variables, introduced 22 case distinctions, treesize of input 158 treesize of output 173 [2023-11-19 04:15:54,715 INFO L349 Elim1Store]: treesize reduction 40, result has 46.7 percent of original size [2023-11-19 04:15:54,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 149 treesize of output 158 [2023-11-19 04:15:54,784 INFO L349 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2023-11-19 04:15:54,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 129 [2023-11-19 04:15:55,162 INFO L349 Elim1Store]: treesize reduction 58, result has 22.7 percent of original size [2023-11-19 04:15:55,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 40 [2023-11-19 04:15:55,431 INFO L349 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2023-11-19 04:15:55,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 88 [2023-11-19 04:15:58,433 INFO L349 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2023-11-19 04:15:58,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 2 case distinctions, treesize of input 101 treesize of output 53 [2023-11-19 04:15:58,484 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:15:58,484 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:16:07,489 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse16 (mod (+ c_~ARR_SIZE~0 4294967295) 4294967296))) (let ((.cse6 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (.cse4 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (.cse10 (* .cse16 4)) (.cse15 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|))) (and (forall ((v_z_15 Int)) (let ((.cse0 (+ .cse16 v_z_15))) (or (< 4294967295 v_z_15) (< .cse0 4294967296) (forall ((v_y_15 Int)) (let ((.cse1 (* v_y_15 4294967296)) (.cse2 (* v_z_15 4294967295))) (let ((.cse12 (+ .cse1 .cse2))) (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store .cse15 (+ (* 17179869180 v_z_15) |c_ULTIMATE.start_main_~#array1~0#1.offset| (* 17179869184 v_y_15)) (* .cse12 |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|))))) (let ((.cse8 (select .cse7 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse9 (* v_z_15 4)) (.cse11 (* .cse12 |c_ULTIMATE.start_main_~num~0#1|))) (or (< c_~ARR_SIZE~0 (+ .cse1 .cse2 1)) (= (let ((.cse5 (store .cse8 (+ .cse9 |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse10) .cse11))) (let ((.cse3 (select (store .cse7 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse5) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse3 .cse4) (select .cse5 .cse6) (select .cse5 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse3 |c_ULTIMATE.start_main_~#array1~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1|))) 0) (< .cse12 0) (= (let ((.cse14 (store .cse8 (+ (- 17179869184) .cse9 |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse10) .cse11))) (let ((.cse13 (select (store .cse7 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse14) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ |c_ULTIMATE.start_main_~sum~0#1| (select .cse13 .cse4) (select .cse13 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse14 .cse6) (select .cse14 |c_ULTIMATE.start_main_~#array2~0#1.offset|)))) 0))))))) (< 6442450943 .cse0)))) (forall ((v_z_15 Int)) (let ((.cse17 (+ .cse16 v_z_15))) (or (< 4294967295 v_z_15) (< .cse17 4294967296) (forall ((v_y_15 Int)) (let ((.cse18 (* v_y_15 4294967296)) (.cse19 (* v_z_15 4294967295))) (let ((.cse20 (+ .cse18 .cse19))) (or (< c_~ARR_SIZE~0 (+ .cse18 .cse19 1)) (< .cse20 0) (= (let ((.cse23 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store .cse15 (+ (* 17179869180 v_z_15) |c_ULTIMATE.start_main_~#array1~0#1.offset| (* 17179869184 v_y_15)) (* .cse20 |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|))))) (let ((.cse22 (store (select .cse23 |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ (- 17179869184) (* v_z_15 4) |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse10) (* .cse20 |c_ULTIMATE.start_main_~num~0#1|)))) (let ((.cse21 (select (store .cse23 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse22) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ |c_ULTIMATE.start_main_~sum~0#1| (select .cse21 .cse4) (select .cse21 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse22 .cse6) (select .cse22 |c_ULTIMATE.start_main_~#array2~0#1.offset|))))) 0))))) (< 6442450943 .cse17)))) (forall ((v_z_18 Int)) (or (< (+ .cse16 v_z_18) 6442450944) (forall ((v_y_18 Int)) (let ((.cse24 (* v_y_18 4294967296)) (.cse25 (* v_z_18 4294967295))) (let ((.cse29 (+ .cse24 .cse25))) (or (< c_~ARR_SIZE~0 (+ .cse24 .cse25 1)) (= (let ((.cse28 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store .cse15 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (* 17179869180 v_z_18) (* 17179869184 v_y_18)) (* .cse29 |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|))))) (let ((.cse27 (store (select .cse28 |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ (* v_z_18 4) |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse10 (- 34359738368)) (* .cse29 |c_ULTIMATE.start_main_~num~0#1|)))) (let ((.cse26 (select (store .cse28 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse27) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ |c_ULTIMATE.start_main_~sum~0#1| (select .cse26 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse27 .cse6) (select .cse26 .cse4) (select .cse27 |c_ULTIMATE.start_main_~#array2~0#1.offset|))))) 0) (< .cse29 0))))) (< 4294967295 v_z_18))) (forall ((v_z_18 Int)) (or (< (+ .cse16 v_z_18) 6442450944) (< 4294967295 v_z_18) (forall ((v_y_18 Int)) (let ((.cse30 (* v_y_18 4294967296)) (.cse31 (* v_z_18 4294967295))) (let ((.cse40 (+ .cse30 .cse31))) (let ((.cse34 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store .cse15 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (* 17179869180 v_z_18) (* 17179869184 v_y_18)) (* .cse40 |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|))))) (let ((.cse35 (select .cse34 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse36 (* v_z_18 4)) (.cse37 (* .cse40 |c_ULTIMATE.start_main_~num~0#1|))) (or (< c_~ARR_SIZE~0 (+ .cse30 .cse31 1)) (= (let ((.cse32 (store .cse35 (+ (- 17179869184) .cse36 |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse10) .cse37))) (let ((.cse33 (select (store .cse34 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse32) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse32 .cse6) |c_ULTIMATE.start_main_~sum~0#1| (select .cse32 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse33 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse33 .cse4)))) 0) (= (let ((.cse39 (store .cse35 (+ .cse36 |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse10 (- 34359738368)) .cse37))) (let ((.cse38 (select (store .cse34 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse39) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ |c_ULTIMATE.start_main_~sum~0#1| (select .cse38 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse39 .cse6) (select .cse38 .cse4) (select .cse39 |c_ULTIMATE.start_main_~#array2~0#1.offset|)))) 0) (< .cse40 0))))))))) (forall ((v_z_18 Int)) (let ((.cse41 (+ .cse16 v_z_18))) (or (< 4294967295 .cse41) (< v_z_18 0) (forall ((v_y_18 Int)) (let ((.cse42 (* v_y_18 4294967296)) (.cse43 (* v_z_18 4294967295))) (let ((.cse52 (+ .cse42 .cse43))) (let ((.cse46 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store .cse15 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (* 17179869180 v_z_18) (* 17179869184 v_y_18)) (* .cse52 |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|))))) (let ((.cse47 (select .cse46 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse48 (* v_z_18 4)) (.cse49 (* .cse52 |c_ULTIMATE.start_main_~num~0#1|))) (or (< c_~ARR_SIZE~0 (+ .cse42 .cse43 1)) (= (let ((.cse44 (store .cse47 (+ (- 17179869184) .cse48 |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse10) .cse49))) (let ((.cse45 (select (store .cse46 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse44) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse44 .cse6) |c_ULTIMATE.start_main_~sum~0#1| (select .cse44 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse45 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse45 .cse4)))) 0) (= (let ((.cse51 (store .cse47 (+ .cse48 |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse10 (- 34359738368)) .cse49))) (let ((.cse50 (select (store .cse46 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse51) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ |c_ULTIMATE.start_main_~sum~0#1| (select .cse50 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse51 .cse6) (select .cse50 .cse4) (select .cse51 |c_ULTIMATE.start_main_~#array2~0#1.offset|)))) 0) (< .cse52 0))))))) (< .cse41 2147483648)))) (forall ((v_z_15 Int)) (or (< v_z_15 0) (forall ((v_y_15 Int)) (let ((.cse53 (* v_y_15 4294967296)) (.cse54 (* v_z_15 4294967295))) (let ((.cse61 (+ .cse53 .cse54))) (let ((.cse57 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store .cse15 (+ (* 17179869180 v_z_15) |c_ULTIMATE.start_main_~#array1~0#1.offset| (* 17179869184 v_y_15)) (* .cse61 |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|))))) (let ((.cse58 (select .cse57 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse59 (* v_z_15 4)) (.cse60 (* .cse61 |c_ULTIMATE.start_main_~num~0#1|))) (or (< c_~ARR_SIZE~0 (+ .cse53 .cse54 1)) (= (let ((.cse56 (store .cse58 (+ .cse59 |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse10) .cse60))) (let ((.cse55 (select (store .cse57 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse56) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse55 .cse4) (select .cse56 .cse6) (select .cse56 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse55 |c_ULTIMATE.start_main_~#array1~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1|))) 0) (< .cse61 0) (= (let ((.cse63 (store .cse58 (+ (- 17179869184) .cse59 |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse10) .cse60))) (let ((.cse62 (select (store .cse57 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse63) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ |c_ULTIMATE.start_main_~sum~0#1| (select .cse62 .cse4) (select .cse62 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse63 .cse6) (select .cse63 |c_ULTIMATE.start_main_~#array2~0#1.offset|)))) 0))))))) (< 2147483647 (+ .cse16 v_z_15)))) (forall ((v_z_15 Int)) (or (< v_z_15 0) (< 2147483647 (+ .cse16 v_z_15)) (forall ((v_y_15 Int)) (let ((.cse64 (* v_y_15 4294967296)) (.cse65 (* v_z_15 4294967295))) (let ((.cse69 (+ .cse64 .cse65))) (or (< c_~ARR_SIZE~0 (+ .cse64 .cse65 1)) (= (let ((.cse68 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store .cse15 (+ (* 17179869180 v_z_15) |c_ULTIMATE.start_main_~#array1~0#1.offset| (* 17179869184 v_y_15)) (* .cse69 |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|))))) (let ((.cse67 (store (select .cse68 |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ (* v_z_15 4) |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse10) (* .cse69 |c_ULTIMATE.start_main_~num~0#1|)))) (let ((.cse66 (select (store .cse68 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse67) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse66 .cse4) (select .cse67 .cse6) (select .cse67 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse66 |c_ULTIMATE.start_main_~#array1~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1|)))) 0) (< .cse69 0))))))) (forall ((v_z_18 Int)) (let ((.cse70 (+ .cse16 v_z_18))) (or (< 4294967295 .cse70) (forall ((v_y_18 Int)) (let ((.cse71 (* v_y_18 4294967296)) (.cse72 (* v_z_18 4294967295))) (let ((.cse76 (+ .cse71 .cse72))) (or (< c_~ARR_SIZE~0 (+ .cse71 .cse72 1)) (= (let ((.cse75 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store .cse15 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (* 17179869180 v_z_18) (* 17179869184 v_y_18)) (* .cse76 |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|))))) (let ((.cse73 (store (select .cse75 |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ (- 17179869184) (* v_z_18 4) |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse10) (* .cse76 |c_ULTIMATE.start_main_~num~0#1|)))) (let ((.cse74 (select (store .cse75 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse73) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse73 .cse6) |c_ULTIMATE.start_main_~sum~0#1| (select .cse73 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse74 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse74 .cse4))))) 0) (< .cse76 0))))) (< v_z_18 0) (< .cse70 2147483648))))))) is different from true [2023-11-19 04:16:07,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:16:07,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301390750] [2023-11-19 04:16:07,495 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:16:07,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519493124] [2023-11-19 04:16:07,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519493124] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:16:07,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1189358546] [2023-11-19 04:16:07,498 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-19 04:16:07,498 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:16:07,499 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:16:07,499 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:16:07,499 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:16:07,944 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-11-19 04:16:07,945 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:16:09,647 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1049#(and (<= |ULTIMATE.start_main_~index~0#1| 32766) (= |ULTIMATE.start_main_~temp~0#1| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~index~0#1|) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (<= 2 |ULTIMATE.start_main_~#array1~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 2 |ULTIMATE.start_main_~#array2~0#1.base|) (= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 32767) (<= 1 ~ARR_SIZE~0))' at error location [2023-11-19 04:16:09,648 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:16:09,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:16:09,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-11-19 04:16:09,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092864713] [2023-11-19 04:16:09,648 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-19 04:16:09,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-19 04:16:09,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:16:09,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-19 04:16:09,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=975, Unknown=2, NotChecked=64, Total=1190 [2023-11-19 04:16:09,651 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 17 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:16:10,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:16:10,908 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2023-11-19 04:16:10,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-19 04:16:10,912 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2023-11-19 04:16:10,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:16:10,914 INFO L225 Difference]: With dead ends: 39 [2023-11-19 04:16:10,915 INFO L226 Difference]: Without dead ends: 36 [2023-11-19 04:16:10,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=237, Invalid=1487, Unknown=2, NotChecked=80, Total=1806 [2023-11-19 04:16:10,919 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 69 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:16:10,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 62 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 04:16:10,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-19 04:16:10,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2023-11-19 04:16:10,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 04:16:10,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2023-11-19 04:16:10,942 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2023-11-19 04:16:10,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:16:10,942 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2023-11-19 04:16:10,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:16:10,942 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2023-11-19 04:16:10,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-19 04:16:10,943 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:16:10,943 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:16:10,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 04:16:11,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:16:11,146 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:16:11,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:16:11,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1815245974, now seen corresponding path program 5 times [2023-11-19 04:16:11,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:16:11,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317355293] [2023-11-19 04:16:11,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:16:11,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:16:11,169 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:16:11,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [290409755] [2023-11-19 04:16:11,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 04:16:11,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:16:11,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:16:11,171 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:16:11,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 04:16:11,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 04:16:11,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:16:11,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 04:16:11,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:16:11,418 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:16:11,418 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:16:11,495 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:16:11,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:16:11,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317355293] [2023-11-19 04:16:11,495 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:16:11,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290409755] [2023-11-19 04:16:11,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290409755] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:16:11,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [577376803] [2023-11-19 04:16:11,499 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-19 04:16:11,499 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:16:11,499 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:16:11,499 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:16:11,499 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:16:12,012 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-11-19 04:16:12,013 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:16:13,146 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1315#(and (<= |ULTIMATE.start_main_~index~0#1| 32766) (= |ULTIMATE.start_main_~temp~0#1| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~index~0#1|) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (<= 2 |ULTIMATE.start_main_~#array1~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 2 |ULTIMATE.start_main_~#array2~0#1.base|) (= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 32767) (<= 1 ~ARR_SIZE~0))' at error location [2023-11-19 04:16:13,147 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:16:13,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 04:16:13,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-11-19 04:16:13,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814786662] [2023-11-19 04:16:13,147 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 04:16:13,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 04:16:13,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:16:13,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 04:16:13,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=460, Unknown=3, NotChecked=0, Total=552 [2023-11-19 04:16:13,150 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 04:16:13,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:16:13,330 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2023-11-19 04:16:13,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 04:16:13,331 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2023-11-19 04:16:13,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:16:13,332 INFO L225 Difference]: With dead ends: 53 [2023-11-19 04:16:13,333 INFO L226 Difference]: Without dead ends: 45 [2023-11-19 04:16:13,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=124, Invalid=629, Unknown=3, NotChecked=0, Total=756 [2023-11-19 04:16:13,335 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 44 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:16:13,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 50 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:16:13,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-19 04:16:13,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2023-11-19 04:16:13,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-19 04:16:13,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2023-11-19 04:16:13,353 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 21 [2023-11-19 04:16:13,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:16:13,354 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2023-11-19 04:16:13,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 04:16:13,354 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2023-11-19 04:16:13,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-19 04:16:13,355 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:16:13,356 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:16:13,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-19 04:16:13,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:16:13,563 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:16:13,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:16:13,563 INFO L85 PathProgramCache]: Analyzing trace with hash 323778874, now seen corresponding path program 6 times [2023-11-19 04:16:13,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:16:13,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393648951] [2023-11-19 04:16:13,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:16:13,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:16:13,613 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:16:13,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1669556860] [2023-11-19 04:16:13,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 04:16:13,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:16:13,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:16:13,618 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:16:13,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 04:16:13,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 04:16:13,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:16:13,722 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 04:16:13,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:16:13,807 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:16:13,808 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:16:13,884 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:16:13,884 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:16:13,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393648951] [2023-11-19 04:16:13,884 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:16:13,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669556860] [2023-11-19 04:16:13,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669556860] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:16:13,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1757836788] [2023-11-19 04:16:13,887 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-19 04:16:13,887 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:16:13,888 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:16:13,888 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:16:13,888 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:16:14,319 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-11-19 04:16:14,321 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:16:15,442 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1605#(and (<= |ULTIMATE.start_main_~index~0#1| 32766) (= |ULTIMATE.start_main_~temp~0#1| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~index~0#1|) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (<= 2 |ULTIMATE.start_main_~#array1~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 2 |ULTIMATE.start_main_~#array2~0#1.base|) (= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 32767) (<= 1 ~ARR_SIZE~0))' at error location [2023-11-19 04:16:15,442 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:16:15,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 04:16:15,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-11-19 04:16:15,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672509974] [2023-11-19 04:16:15,443 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 04:16:15,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 04:16:15,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:16:15,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 04:16:15,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=455, Unknown=4, NotChecked=0, Total=552 [2023-11-19 04:16:15,445 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 04:16:15,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:16:15,643 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2023-11-19 04:16:15,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 04:16:15,645 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2023-11-19 04:16:15,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:16:15,646 INFO L225 Difference]: With dead ends: 45 [2023-11-19 04:16:15,647 INFO L226 Difference]: Without dead ends: 42 [2023-11-19 04:16:15,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=127, Invalid=625, Unknown=4, NotChecked=0, Total=756 [2023-11-19 04:16:15,648 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 42 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:16:15,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 44 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:16:15,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-19 04:16:15,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2023-11-19 04:16:15,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-19 04:16:15,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2023-11-19 04:16:15,663 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 21 [2023-11-19 04:16:15,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:16:15,663 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2023-11-19 04:16:15,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 04:16:15,664 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2023-11-19 04:16:15,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-19 04:16:15,665 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:16:15,665 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:16:15,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 04:16:15,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:16:15,869 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:16:15,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:16:15,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1446975050, now seen corresponding path program 7 times [2023-11-19 04:16:15,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:16:15,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116639682] [2023-11-19 04:16:15,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:16:15,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:16:15,902 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:16:15,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1107193578] [2023-11-19 04:16:15,902 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 04:16:15,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:16:15,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:16:15,904 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:16:15,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_010e1db0-9ec4-40f5-a252-b7df1c08d61d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 04:16:16,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:16:16,069 WARN L260 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 73 conjunts are in the unsatisfiable core [2023-11-19 04:16:16,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:16:16,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-19 04:16:16,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-19 04:16:16,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2023-11-19 04:16:16,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 55 [2023-11-19 04:16:17,545 INFO L349 Elim1Store]: treesize reduction 264, result has 25.0 percent of original size [2023-11-19 04:16:17,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 5 disjoint index pairs (out of 66 index pairs), introduced 13 new quantified variables, introduced 45 case distinctions, treesize of input 186 treesize of output 225 [2023-11-19 04:16:17,717 INFO L349 Elim1Store]: treesize reduction 40, result has 46.7 percent of original size [2023-11-19 04:16:17,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 189 treesize of output 190 [2023-11-19 04:16:17,795 INFO L349 Elim1Store]: treesize reduction 99, result has 1.0 percent of original size [2023-11-19 04:16:17,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 137 [2023-11-19 04:16:17,929 INFO L349 Elim1Store]: treesize reduction 100, result has 29.6 percent of original size [2023-11-19 04:16:17,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 56 [2023-11-19 04:16:18,225 INFO L349 Elim1Store]: treesize reduction 70, result has 37.5 percent of original size [2023-11-19 04:16:18,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 72 [2023-11-19 04:16:18,705 INFO L349 Elim1Store]: treesize reduction 64, result has 36.0 percent of original size [2023-11-19 04:16:18,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 140 treesize of output 169 [2023-11-19 04:16:20,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 57 [2023-11-19 04:16:20,237 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:16:20,238 INFO L327 TraceCheckSpWp]: Computing backward predicates...