./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array4_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array4_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E --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 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 03:14:54,842 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 03:14:54,957 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 03:14:54,964 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 03:14:54,964 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 03:14:54,996 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 03:14:54,997 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 03:14:54,997 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 03:14:54,998 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 03:14:54,998 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 03:14:54,998 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 03:14:54,999 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 03:14:54,999 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 03:14:54,999 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 03:14:54,999 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 03:14:54,999 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 03:14:55,000 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 03:14:55,000 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 03:14:55,000 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 03:14:55,000 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 03:14:55,000 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 03:14:55,001 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 03:14:55,001 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 03:14:55,001 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 03:14:55,002 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 03:14:55,002 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 03:14:55,002 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 03:14:55,002 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 03:14:55,006 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 03:14:55,006 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 03:14:55,006 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 03:14:55,006 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 03:14:55,006 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 03:14:55,006 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 03:14:55,006 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 03:14:55,007 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 03:14:55,007 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 03:14:55,007 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 03:14:55,007 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:14:55,007 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 03:14:55,007 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 03:14:55,008 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 03:14:55,008 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 03:14:55,008 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 03:14:55,008 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 03:14:55,008 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 03:14:55,008 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 03:14:55,008 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E 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 -> 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 [2024-11-14 03:14:55,429 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 03:14:55,447 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 03:14:55,452 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 03:14:55,456 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 03:14:55,456 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 03:14:55,458 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/array-patterns/array4_pattern.c Unable to find full path for "g++" [2024-11-14 03:14:57,838 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 03:14:58,283 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 03:14:58,287 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/sv-benchmarks/c/array-patterns/array4_pattern.c [2024-11-14 03:14:58,308 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/data/38ae77380/4f4e8eaebf08489ca754319dd0b8468b/FLAG2fede9195 [2024-11-14 03:14:58,338 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/data/38ae77380/4f4e8eaebf08489ca754319dd0b8468b [2024-11-14 03:14:58,341 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 03:14:58,345 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 03:14:58,347 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 03:14:58,348 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 03:14:58,354 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 03:14:58,356 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:14:58" (1/1) ... [2024-11-14 03:14:58,360 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@602923e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:14:58, skipping insertion in model container [2024-11-14 03:14:58,361 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:14:58" (1/1) ... [2024-11-14 03:14:58,386 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 03:14:58,621 WARN L250 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_0bfe5381-5970-48eb-8355-05b894bd13c3/sv-benchmarks/c/array-patterns/array4_pattern.c[1835,1848] [2024-11-14 03:14:58,661 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:14:58,675 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 03:14:58,689 WARN L250 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_0bfe5381-5970-48eb-8355-05b894bd13c3/sv-benchmarks/c/array-patterns/array4_pattern.c[1835,1848] [2024-11-14 03:14:58,719 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:14:58,748 INFO L204 MainTranslator]: Completed translation [2024-11-14 03:14:58,749 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:14:58 WrapperNode [2024-11-14 03:14:58,749 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 03:14:58,751 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 03:14:58,751 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 03:14:58,752 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 03:14:58,762 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:14:58" (1/1) ... [2024-11-14 03:14:58,775 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:14:58" (1/1) ... [2024-11-14 03:14:58,808 INFO L138 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 93 [2024-11-14 03:14:58,811 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 03:14:58,811 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 03:14:58,812 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 03:14:58,812 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 03:14:58,822 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:14:58" (1/1) ... [2024-11-14 03:14:58,823 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:14:58" (1/1) ... [2024-11-14 03:14:58,826 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:14:58" (1/1) ... [2024-11-14 03:14:58,828 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:14:58" (1/1) ... [2024-11-14 03:14:58,837 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:14:58" (1/1) ... [2024-11-14 03:14:58,844 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:14:58" (1/1) ... [2024-11-14 03:14:58,849 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:14:58" (1/1) ... [2024-11-14 03:14:58,853 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:14:58" (1/1) ... [2024-11-14 03:14:58,856 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 03:14:58,857 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 03:14:58,858 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 03:14:58,858 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 03:14:58,859 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:14:58" (1/1) ... [2024-11-14 03:14:58,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:14:58,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:14:58,909 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 03:14:58,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 03:14:58,952 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 03:14:58,952 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-14 03:14:58,952 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-14 03:14:58,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 03:14:58,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-14 03:14:58,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-14 03:14:58,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 03:14:58,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 03:14:58,955 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-14 03:14:58,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 03:14:59,066 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 03:14:59,068 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 03:14:59,359 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2024-11-14 03:14:59,359 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 03:14:59,419 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 03:14:59,420 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-14 03:14:59,420 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:14:59 BoogieIcfgContainer [2024-11-14 03:14:59,421 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 03:14:59,428 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 03:14:59,429 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 03:14:59,438 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 03:14:59,439 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 03:14:58" (1/3) ... [2024-11-14 03:14:59,441 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51ea9df7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:14:59, skipping insertion in model container [2024-11-14 03:14:59,441 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:14:58" (2/3) ... [2024-11-14 03:14:59,442 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51ea9df7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:14:59, skipping insertion in model container [2024-11-14 03:14:59,443 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:14:59" (3/3) ... [2024-11-14 03:14:59,445 INFO L112 eAbstractionObserver]: Analyzing ICFG array4_pattern.c [2024-11-14 03:14:59,474 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 03:14:59,478 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG array4_pattern.c that has 2 procedures, 22 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2024-11-14 03:14:59,569 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 03:14:59,590 INFO L333 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, 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;@17ebcc88, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 03:14:59,592 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 03:14:59,597 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-14 03:14:59,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-14 03:14:59,609 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:14:59,610 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:14:59,611 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:14:59,617 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:14:59,619 INFO L85 PathProgramCache]: Analyzing trace with hash 984319321, now seen corresponding path program 1 times [2024-11-14 03:14:59,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:14:59,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869555049] [2024-11-14 03:14:59,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:14:59,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:14:59,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:59,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:14:59,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:14:59,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869555049] [2024-11-14 03:14:59,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869555049] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:14:59,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:14:59,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:14:59,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035763935] [2024-11-14 03:14:59,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:14:59,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-14 03:14:59,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:14:59,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-14 03:14:59,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-14 03:14:59,936 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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) [2024-11-14 03:14:59,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:14:59,991 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2024-11-14 03:14:59,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-14 03:14:59,994 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 [2024-11-14 03:14:59,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:00,006 INFO L225 Difference]: With dead ends: 29 [2024-11-14 03:15:00,006 INFO L226 Difference]: Without dead ends: 20 [2024-11-14 03:15:00,010 INFO L431 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 [2024-11-14 03:15:00,017 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:00,018 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 03:15:00,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-14 03:15:00,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-11-14 03:15:00,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-14 03:15:00,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2024-11-14 03:15:00,079 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 11 [2024-11-14 03:15:00,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:00,081 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2024-11-14 03:15:00,082 INFO L472 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) [2024-11-14 03:15:00,083 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2024-11-14 03:15:00,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-14 03:15:00,086 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:00,086 INFO L215 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:15:00,086 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 03:15:00,087 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:15:00,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:00,090 INFO L85 PathProgramCache]: Analyzing trace with hash 2133552957, now seen corresponding path program 1 times [2024-11-14 03:15:00,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:00,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109735391] [2024-11-14 03:15:00,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:00,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:00,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:00,672 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-14 03:15:00,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:00,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109735391] [2024-11-14 03:15:00,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109735391] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:15:00,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:15:00,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 03:15:00,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77671552] [2024-11-14 03:15:00,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:15:00,674 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:15:00,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:00,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:15:00,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:15:00,680 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 03:15:00,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:00,743 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2024-11-14 03:15:00,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:15:00,744 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 27 [2024-11-14 03:15:00,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:00,745 INFO L225 Difference]: With dead ends: 24 [2024-11-14 03:15:00,745 INFO L226 Difference]: Without dead ends: 21 [2024-11-14 03:15:00,746 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:15:00,747 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 2 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 47 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 [2024-11-14 03:15:00,747 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 47 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:15:00,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-14 03:15:00,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-11-14 03:15:00,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-14 03:15:00,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2024-11-14 03:15:00,763 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 27 [2024-11-14 03:15:00,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:00,763 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2024-11-14 03:15:00,763 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 03:15:00,764 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2024-11-14 03:15:00,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-14 03:15:00,765 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:00,765 INFO L215 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:15:00,765 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 03:15:00,765 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:15:00,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:00,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1714241662, now seen corresponding path program 1 times [2024-11-14 03:15:00,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:00,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298531590] [2024-11-14 03:15:00,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:00,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:00,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:01,007 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-14 03:15:01,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:01,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298531590] [2024-11-14 03:15:01,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298531590] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:15:01,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:15:01,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 03:15:01,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654518629] [2024-11-14 03:15:01,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:15:01,008 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:15:01,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:01,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:15:01,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:15:01,009 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 03:15:01,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:01,123 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2024-11-14 03:15:01,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 03:15:01,125 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 28 [2024-11-14 03:15:01,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:01,126 INFO L225 Difference]: With dead ends: 39 [2024-11-14 03:15:01,128 INFO L226 Difference]: Without dead ends: 22 [2024-11-14 03:15:01,128 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:15:01,129 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:01,131 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 45 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:15:01,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-14 03:15:01,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-11-14 03:15:01,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-14 03:15:01,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2024-11-14 03:15:01,145 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 28 [2024-11-14 03:15:01,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:01,146 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2024-11-14 03:15:01,146 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 03:15:01,146 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2024-11-14 03:15:01,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-14 03:15:01,148 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:01,149 INFO L215 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:15:01,149 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 03:15:01,149 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:15:01,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:01,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1737013974, now seen corresponding path program 1 times [2024-11-14 03:15:01,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:01,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979374713] [2024-11-14 03:15:01,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:01,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:01,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:15:01,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1215655952] [2024-11-14 03:15:01,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:01,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:01,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:15:01,265 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:15:01,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 03:15:01,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:01,428 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-14 03:15:01,440 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:15:01,567 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 [2024-11-14 03:15:01,708 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2024-11-14 03:15:01,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-14 03:15:03,291 INFO L349 Elim1Store]: treesize reduction 58, result has 47.7 percent of original size [2024-11-14 03:15:03,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 78 [2024-11-14 03:15:03,593 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:15:03,594 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:15:04,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:04,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979374713] [2024-11-14 03:15:04,468 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:15:04,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215655952] [2024-11-14 03:15:04,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215655952] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:15:04,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [544995309] [2024-11-14 03:15:04,492 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 03:15:04,492 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:15:04,496 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:15:04,502 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:15:04,503 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:15:06,708 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2024-11-14 03:15:06,713 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:15:09,773 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '421#(<= 1 ~ARR_SIZE~0)' at error location [2024-11-14 03:15:09,773 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:15:09,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:15:09,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-11-14 03:15:09,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271840175] [2024-11-14 03:15:09,774 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-14 03:15:09,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-14 03:15:09,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:09,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-14 03:15:09,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1201, Unknown=0, NotChecked=0, Total=1406 [2024-11-14 03:15:09,778 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 16 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-14 03:15:10,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:10,713 INFO L93 Difference]: Finished difference Result 64 states and 81 transitions. [2024-11-14 03:15:10,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-14 03:15:10,715 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2024-11-14 03:15:10,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:10,716 INFO L225 Difference]: With dead ends: 64 [2024-11-14 03:15:10,716 INFO L226 Difference]: Without dead ends: 61 [2024-11-14 03:15:10,721 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=265, Invalid=1541, Unknown=0, NotChecked=0, Total=1806 [2024-11-14 03:15:10,722 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 62 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:10,722 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 84 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 03:15:10,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-14 03:15:10,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2024-11-14 03:15:10,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-14 03:15:10,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 71 transitions. [2024-11-14 03:15:10,754 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 71 transitions. Word has length 29 [2024-11-14 03:15:10,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:10,754 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 71 transitions. [2024-11-14 03:15:10,754 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-14 03:15:10,754 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 71 transitions. [2024-11-14 03:15:10,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-14 03:15:10,759 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:10,759 INFO L215 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:15:10,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 03:15:10,963 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-14 03:15:10,963 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:15:10,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:10,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1985751089, now seen corresponding path program 2 times [2024-11-14 03:15:10,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:10,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644785802] [2024-11-14 03:15:10,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:10,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:10,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:11,266 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-14 03:15:11,266 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:11,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644785802] [2024-11-14 03:15:11,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644785802] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:15:11,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008518744] [2024-11-14 03:15:11,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:15:11,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:11,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:15:11,269 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:15:11,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 03:15:11,366 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-14 03:15:11,366 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:15:11,367 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 03:15:11,370 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:15:11,467 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 03:15:11,467 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:15:11,566 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-14 03:15:11,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008518744] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:15:11,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [711732109] [2024-11-14 03:15:11,569 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 03:15:11,570 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:15:11,570 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:15:11,570 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:15:11,571 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:15:12,861 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2024-11-14 03:15:12,868 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:15:14,831 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '824#(<= 1 ~ARR_SIZE~0)' at error location [2024-11-14 03:15:14,831 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:15:14,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:15:14,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-14 03:15:14,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787796088] [2024-11-14 03:15:14,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:15:14,832 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-14 03:15:14,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:14,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-14 03:15:14,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=655, Unknown=0, NotChecked=0, Total=812 [2024-11-14 03:15:14,838 INFO L87 Difference]: Start difference. First operand 54 states and 71 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-14 03:15:15,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:15,089 INFO L93 Difference]: Finished difference Result 78 states and 100 transitions. [2024-11-14 03:15:15,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 03:15:15,090 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 30 [2024-11-14 03:15:15,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:15,096 INFO L225 Difference]: With dead ends: 78 [2024-11-14 03:15:15,098 INFO L226 Difference]: Without dead ends: 71 [2024-11-14 03:15:15,099 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=165, Invalid=705, Unknown=0, NotChecked=0, Total=870 [2024-11-14 03:15:15,100 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 32 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:15,103 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 74 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:15:15,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-14 03:15:15,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 66. [2024-11-14 03:15:15,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 41 states have internal predecessors, (44), 21 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2024-11-14 03:15:15,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 86 transitions. [2024-11-14 03:15:15,137 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 86 transitions. Word has length 30 [2024-11-14 03:15:15,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:15,137 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 86 transitions. [2024-11-14 03:15:15,138 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-14 03:15:15,138 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 86 transitions. [2024-11-14 03:15:15,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-14 03:15:15,139 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:15,139 INFO L215 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:15:15,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 03:15:15,340 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:15,340 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:15:15,341 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:15,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1351756290, now seen corresponding path program 3 times [2024-11-14 03:15:15,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:15,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526974372] [2024-11-14 03:15:15,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:15,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:15,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:15,519 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-14 03:15:15,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:15,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526974372] [2024-11-14 03:15:15,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526974372] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:15:15,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693331470] [2024-11-14 03:15:15,519 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:15:15,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:15,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:15:15,522 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:15:15,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 03:15:15,617 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:15:15,617 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:15:15,618 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 03:15:15,621 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:15:15,710 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 03:15:15,710 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:15:15,813 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-14 03:15:15,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693331470] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:15:15,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [569385203] [2024-11-14 03:15:15,818 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 03:15:15,818 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:15:15,819 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:15:15,823 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:15:15,823 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:15:16,875 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2024-11-14 03:15:16,877 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:15:18,673 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1263#(<= 1 ~ARR_SIZE~0)' at error location [2024-11-14 03:15:18,673 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:15:18,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:15:18,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-14 03:15:18,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262324055] [2024-11-14 03:15:18,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:15:18,674 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-14 03:15:18,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:18,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-14 03:15:18,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=632, Unknown=0, NotChecked=0, Total=812 [2024-11-14 03:15:18,676 INFO L87 Difference]: Start difference. First operand 66 states and 86 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-14 03:15:18,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:18,895 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2024-11-14 03:15:18,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 03:15:18,896 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 30 [2024-11-14 03:15:18,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:18,897 INFO L225 Difference]: With dead ends: 76 [2024-11-14 03:15:18,897 INFO L226 Difference]: Without dead ends: 73 [2024-11-14 03:15:18,898 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 64 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=199, Invalid=731, Unknown=0, NotChecked=0, Total=930 [2024-11-14 03:15:18,899 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 24 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:18,904 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 91 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:15:18,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-14 03:15:18,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 60. [2024-11-14 03:15:18,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 37 states have (on average 1.135135135135135) internal successors, (42), 38 states have internal predecessors, (42), 17 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-14 03:15:18,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 76 transitions. [2024-11-14 03:15:18,939 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 76 transitions. Word has length 30 [2024-11-14 03:15:18,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:18,939 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 76 transitions. [2024-11-14 03:15:18,940 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-14 03:15:18,940 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 76 transitions. [2024-11-14 03:15:18,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-14 03:15:18,941 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:18,941 INFO L215 NwaCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:15:18,969 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 03:15:19,148 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-14 03:15:19,148 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:15:19,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:19,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1043837405, now seen corresponding path program 4 times [2024-11-14 03:15:19,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:19,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271079776] [2024-11-14 03:15:19,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:19,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:19,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:15:19,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1070903549] [2024-11-14 03:15:19,225 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:15:19,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:19,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:15:19,228 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:15:19,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 03:15:19,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:19,354 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-14 03:15:19,363 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:15:19,378 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 [2024-11-14 03:15:19,428 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 [2024-11-14 03:15:19,492 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 [2024-11-14 03:15:21,219 INFO L349 Elim1Store]: treesize reduction 312, result has 24.5 percent of original size [2024-11-14 03:15:21,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 90 treesize of output 145 [2024-11-14 03:15:21,739 INFO L349 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2024-11-14 03:15:21,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 46 [2024-11-14 03:15:21,797 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 03:15:21,797 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:15:22,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:22,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271079776] [2024-11-14 03:15:22,309 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:15:22,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070903549] [2024-11-14 03:15:22,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070903549] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:15:22,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1361112497] [2024-11-14 03:15:22,312 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 03:15:22,312 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:15:22,312 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:15:22,312 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:15:22,313 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:15:23,198 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2024-11-14 03:15:23,201 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:15:25,642 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1668#(<= 1 ~ARR_SIZE~0)' at error location [2024-11-14 03:15:25,642 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:15:25,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:15:25,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-11-14 03:15:25,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751712884] [2024-11-14 03:15:25,643 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-14 03:15:25,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-14 03:15:25,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:25,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-14 03:15:25,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1268, Unknown=0, NotChecked=0, Total=1482 [2024-11-14 03:15:25,646 INFO L87 Difference]: Start difference. First operand 60 states and 76 transitions. Second operand has 16 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-14 03:15:26,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:26,657 INFO L93 Difference]: Finished difference Result 97 states and 125 transitions. [2024-11-14 03:15:26,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-14 03:15:26,658 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 31 [2024-11-14 03:15:26,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:26,660 INFO L225 Difference]: With dead ends: 97 [2024-11-14 03:15:26,660 INFO L226 Difference]: Without dead ends: 94 [2024-11-14 03:15:26,661 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=240, Invalid=1400, Unknown=0, NotChecked=0, Total=1640 [2024-11-14 03:15:26,662 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 45 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:26,663 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 135 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 03:15:26,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-14 03:15:26,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 74. [2024-11-14 03:15:26,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 47 states have internal predecessors, (53), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2024-11-14 03:15:26,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 95 transitions. [2024-11-14 03:15:26,697 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 95 transitions. Word has length 31 [2024-11-14 03:15:26,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:26,697 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 95 transitions. [2024-11-14 03:15:26,698 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-14 03:15:26,698 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 95 transitions. [2024-11-14 03:15:26,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-14 03:15:26,699 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:26,699 INFO L215 NwaCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:15:26,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-14 03:15:26,904 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-14 03:15:26,904 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:15:26,905 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:26,905 INFO L85 PathProgramCache]: Analyzing trace with hash -2002169378, now seen corresponding path program 5 times [2024-11-14 03:15:26,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:26,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506496975] [2024-11-14 03:15:26,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:26,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:26,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:27,212 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-14 03:15:27,212 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:27,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506496975] [2024-11-14 03:15:27,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506496975] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:15:27,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051201335] [2024-11-14 03:15:27,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:15:27,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:27,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:15:27,216 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:15:27,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 03:15:27,350 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-14 03:15:27,350 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:15:27,352 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 03:15:27,355 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:15:27,498 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 03:15:27,499 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:15:27,616 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-14 03:15:27,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051201335] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:15:27,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1716966775] [2024-11-14 03:15:27,618 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 03:15:27,619 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:15:27,619 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:15:27,620 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:15:27,620 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:15:28,531 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2024-11-14 03:15:28,533 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:15:30,558 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2171#(<= 1 ~ARR_SIZE~0)' at error location [2024-11-14 03:15:30,558 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:15:30,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:15:30,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-14 03:15:30,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141640226] [2024-11-14 03:15:30,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:15:30,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-14 03:15:30,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:30,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-14 03:15:30,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2024-11-14 03:15:30,560 INFO L87 Difference]: Start difference. First operand 74 states and 95 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-14 03:15:30,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:30,974 INFO L93 Difference]: Finished difference Result 146 states and 195 transitions. [2024-11-14 03:15:30,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-14 03:15:30,975 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 32 [2024-11-14 03:15:30,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:30,976 INFO L225 Difference]: With dead ends: 146 [2024-11-14 03:15:30,976 INFO L226 Difference]: Without dead ends: 138 [2024-11-14 03:15:30,977 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=215, Invalid=975, Unknown=0, NotChecked=0, Total=1190 [2024-11-14 03:15:30,981 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 65 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:30,982 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 119 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:15:30,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-11-14 03:15:31,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 85. [2024-11-14 03:15:31,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 53 states have internal predecessors, (59), 25 states have call successors, (25), 7 states have call predecessors, (25), 7 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2024-11-14 03:15:31,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 109 transitions. [2024-11-14 03:15:31,036 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 109 transitions. Word has length 32 [2024-11-14 03:15:31,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:31,036 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 109 transitions. [2024-11-14 03:15:31,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-14 03:15:31,037 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 109 transitions. [2024-11-14 03:15:31,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-14 03:15:31,038 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:31,038 INFO L215 NwaCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:15:31,057 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 03:15:31,240 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-14 03:15:31,240 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:15:31,240 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:31,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1909284273, now seen corresponding path program 6 times [2024-11-14 03:15:31,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:31,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387151211] [2024-11-14 03:15:31,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:31,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:31,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:31,503 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-14 03:15:31,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:31,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387151211] [2024-11-14 03:15:31,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387151211] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:15:31,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063760296] [2024-11-14 03:15:31,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:15:31,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:31,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:15:31,507 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:15:31,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 03:15:31,650 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:15:31,650 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:15:31,652 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 03:15:31,654 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:15:31,767 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 03:15:31,767 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:15:31,868 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-14 03:15:31,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063760296] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:15:31,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1650346718] [2024-11-14 03:15:31,871 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 03:15:31,871 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:15:31,871 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:15:31,872 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:15:31,872 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:15:32,527 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2024-11-14 03:15:32,528 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:15:34,219 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2768#(<= 1 ~ARR_SIZE~0)' at error location [2024-11-14 03:15:34,219 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:15:34,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:15:34,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-14 03:15:34,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600789894] [2024-11-14 03:15:34,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:15:34,220 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-14 03:15:34,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:34,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-14 03:15:34,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2024-11-14 03:15:34,222 INFO L87 Difference]: Start difference. First operand 85 states and 109 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-14 03:15:34,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:34,798 INFO L93 Difference]: Finished difference Result 122 states and 159 transitions. [2024-11-14 03:15:34,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-14 03:15:34,799 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 32 [2024-11-14 03:15:34,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:34,801 INFO L225 Difference]: With dead ends: 122 [2024-11-14 03:15:34,801 INFO L226 Difference]: Without dead ends: 119 [2024-11-14 03:15:34,802 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 67 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=246, Invalid=1014, Unknown=0, NotChecked=0, Total=1260 [2024-11-14 03:15:34,802 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 42 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:34,803 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 144 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 03:15:34,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-11-14 03:15:34,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 86. [2024-11-14 03:15:34,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 54 states have internal predecessors, (60), 25 states have call successors, (25), 7 states have call predecessors, (25), 7 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2024-11-14 03:15:34,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 110 transitions. [2024-11-14 03:15:34,839 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 110 transitions. Word has length 32 [2024-11-14 03:15:34,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:34,839 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 110 transitions. [2024-11-14 03:15:34,840 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-14 03:15:34,840 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 110 transitions. [2024-11-14 03:15:34,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-14 03:15:34,846 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:34,846 INFO L215 NwaCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:15:34,878 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 03:15:35,046 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:35,047 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:15:35,048 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:35,048 INFO L85 PathProgramCache]: Analyzing trace with hash -943120246, now seen corresponding path program 7 times [2024-11-14 03:15:35,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:35,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731074662] [2024-11-14 03:15:35,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:35,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:35,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:15:35,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [837323146] [2024-11-14 03:15:35,178 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:15:35,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:35,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:15:35,181 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:15:35,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 03:15:35,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:35,328 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-11-14 03:15:35,334 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:15:35,360 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 [2024-11-14 03:15:35,409 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 [2024-11-14 03:15:35,481 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 [2024-11-14 03:15:35,568 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 [2024-11-14 03:15:37,895 INFO L349 Elim1Store]: treesize reduction 468, result has 24.4 percent of original size [2024-11-14 03:15:37,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 48 case distinctions, treesize of input 118 treesize of output 207 [2024-11-14 03:15:38,781 INFO L349 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2024-11-14 03:15:38,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 164 treesize of output 80 [2024-11-14 03:15:38,846 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 03:15:38,846 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:15:39,498 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:39,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731074662] [2024-11-14 03:15:39,498 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:15:39,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837323146] [2024-11-14 03:15:39,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837323146] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:15:39,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [613056981] [2024-11-14 03:15:39,500 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 03:15:39,500 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:15:39,500 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:15:39,501 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:15:39,501 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:15:40,179 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2024-11-14 03:15:40,182 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:15:42,458 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3307#(and (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (<= 1 ~ARR_SIZE~0))' at error location [2024-11-14 03:15:42,459 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:15:42,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:15:42,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-11-14 03:15:42,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620395911] [2024-11-14 03:15:42,459 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-14 03:15:42,459 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-14 03:15:42,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:42,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-14 03:15:42,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1632, Unknown=0, NotChecked=0, Total=1892 [2024-11-14 03:15:42,461 INFO L87 Difference]: Start difference. First operand 86 states and 110 transitions. Second operand has 20 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-14 03:15:44,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:44,604 INFO L93 Difference]: Finished difference Result 125 states and 161 transitions. [2024-11-14 03:15:44,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-14 03:15:44,605 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 33 [2024-11-14 03:15:44,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:44,607 INFO L225 Difference]: With dead ends: 125 [2024-11-14 03:15:44,607 INFO L226 Difference]: Without dead ends: 122 [2024-11-14 03:15:44,608 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=377, Invalid=2485, Unknown=0, NotChecked=0, Total=2862 [2024-11-14 03:15:44,609 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 67 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:44,609 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 141 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-14 03:15:44,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-11-14 03:15:44,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 100. [2024-11-14 03:15:44,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 63 states have internal predecessors, (71), 29 states have call successors, (29), 8 states have call predecessors, (29), 8 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2024-11-14 03:15:44,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 129 transitions. [2024-11-14 03:15:44,657 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 129 transitions. Word has length 33 [2024-11-14 03:15:44,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:44,658 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 129 transitions. [2024-11-14 03:15:44,658 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-14 03:15:44,658 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 129 transitions. [2024-11-14 03:15:44,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-14 03:15:44,660 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:44,660 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:15:44,676 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 03:15:44,860 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-14 03:15:44,861 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:15:44,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:44,862 INFO L85 PathProgramCache]: Analyzing trace with hash 826652881, now seen corresponding path program 8 times [2024-11-14 03:15:44,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:44,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207822019] [2024-11-14 03:15:44,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:44,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:44,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:45,109 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-14 03:15:45,109 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:45,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207822019] [2024-11-14 03:15:45,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207822019] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:15:45,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407269834] [2024-11-14 03:15:45,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:15:45,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:45,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:15:45,113 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:15:45,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 03:15:45,236 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-14 03:15:45,236 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:15:45,237 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-14 03:15:45,239 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:15:45,350 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 03:15:45,350 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:15:45,453 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-14 03:15:45,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407269834] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:15:45,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [115752080] [2024-11-14 03:15:45,455 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 03:15:45,455 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:15:45,455 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:15:45,456 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:15:45,456 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:15:46,269 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2024-11-14 03:15:46,271 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:15:48,157 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3932#(<= 1 ~ARR_SIZE~0)' at error location [2024-11-14 03:15:48,157 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:15:48,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:15:48,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-11-14 03:15:48,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387008523] [2024-11-14 03:15:48,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:15:48,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-14 03:15:48,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:48,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-14 03:15:48,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=973, Unknown=0, NotChecked=0, Total=1190 [2024-11-14 03:15:48,159 INFO L87 Difference]: Start difference. First operand 100 states and 129 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-14 03:15:49,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:49,004 INFO L93 Difference]: Finished difference Result 234 states and 320 transitions. [2024-11-14 03:15:49,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-14 03:15:49,005 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 34 [2024-11-14 03:15:49,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:49,007 INFO L225 Difference]: With dead ends: 234 [2024-11-14 03:15:49,007 INFO L226 Difference]: Without dead ends: 225 [2024-11-14 03:15:49,010 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 71 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=289, Invalid=1351, Unknown=0, NotChecked=0, Total=1640 [2024-11-14 03:15:49,011 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 145 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:49,011 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 169 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:15:49,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2024-11-14 03:15:49,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 111. [2024-11-14 03:15:49,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 69 states have internal predecessors, (77), 33 states have call successors, (33), 9 states have call predecessors, (33), 9 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2024-11-14 03:15:49,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 143 transitions. [2024-11-14 03:15:49,086 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 143 transitions. Word has length 34 [2024-11-14 03:15:49,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:49,086 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 143 transitions. [2024-11-14 03:15:49,088 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-14 03:15:49,088 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 143 transitions. [2024-11-14 03:15:49,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-14 03:15:49,091 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:49,091 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:15:49,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 03:15:49,292 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-14 03:15:49,293 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:15:49,293 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:49,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1822631774, now seen corresponding path program 9 times [2024-11-14 03:15:49,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:49,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23668535] [2024-11-14 03:15:49,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:49,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:49,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:49,535 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-14 03:15:49,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:49,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23668535] [2024-11-14 03:15:49,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23668535] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:15:49,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424528561] [2024-11-14 03:15:49,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:15:49,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:49,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:15:49,539 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:15:49,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 03:15:49,701 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:15:49,701 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:15:49,702 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-14 03:15:49,704 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:15:49,822 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 03:15:49,822 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:15:49,960 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-14 03:15:49,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424528561] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:15:49,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1398879868] [2024-11-14 03:15:49,962 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 03:15:49,962 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:15:49,963 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:15:49,963 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:15:49,963 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:15:50,638 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2024-11-14 03:15:50,640 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:15:52,431 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4732#(<= 1 ~ARR_SIZE~0)' at error location [2024-11-14 03:15:52,431 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:15:52,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:15:52,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-11-14 03:15:52,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548970098] [2024-11-14 03:15:52,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:15:52,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-14 03:15:52,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:52,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-14 03:15:52,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=964, Unknown=0, NotChecked=0, Total=1190 [2024-11-14 03:15:52,433 INFO L87 Difference]: Start difference. First operand 111 states and 143 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-14 03:15:52,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:52,898 INFO L93 Difference]: Finished difference Result 161 states and 211 transitions. [2024-11-14 03:15:52,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 03:15:52,899 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 34 [2024-11-14 03:15:52,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:52,901 INFO L225 Difference]: With dead ends: 161 [2024-11-14 03:15:52,901 INFO L226 Difference]: Without dead ends: 158 [2024-11-14 03:15:52,902 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 70 SyntacticMatches, 8 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=288, Invalid=1272, Unknown=0, NotChecked=0, Total=1560 [2024-11-14 03:15:52,902 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 59 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:52,903 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 197 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:15:52,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-11-14 03:15:52,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 112. [2024-11-14 03:15:52,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 70 states have internal predecessors, (78), 33 states have call successors, (33), 9 states have call predecessors, (33), 9 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2024-11-14 03:15:52,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 144 transitions. [2024-11-14 03:15:52,957 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 144 transitions. Word has length 34 [2024-11-14 03:15:52,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:52,957 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 144 transitions. [2024-11-14 03:15:52,958 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-14 03:15:52,958 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 144 transitions. [2024-11-14 03:15:52,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-14 03:15:52,958 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:52,959 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:15:52,976 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-14 03:15:53,159 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:53,159 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:15:53,160 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:53,160 INFO L85 PathProgramCache]: Analyzing trace with hash 665619581, now seen corresponding path program 10 times [2024-11-14 03:15:53,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:53,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005191948] [2024-11-14 03:15:53,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:53,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:53,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:15:53,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [803599816] [2024-11-14 03:15:53,247 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:15:53,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:53,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:15:53,251 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:15:53,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 03:15:53,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:53,456 WARN L253 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 94 conjuncts are in the unsatisfiable core [2024-11-14 03:15:53,463 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:15:53,508 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 [2024-11-14 03:15:53,575 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 [2024-11-14 03:15:53,638 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 [2024-11-14 03:15:53,744 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 [2024-11-14 03:15:53,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 75 [2024-11-14 03:15:57,040 INFO L349 Elim1Store]: treesize reduction 624, result has 24.4 percent of original size [2024-11-14 03:15:57,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 16 select indices, 16 select index equivalence classes, 9 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 80 case distinctions, treesize of input 146 treesize of output 269 [2024-11-14 03:15:58,663 INFO L349 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2024-11-14 03:15:58,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 252 treesize of output 120 [2024-11-14 03:15:58,750 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 03:15:58,750 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:16:00,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:16:00,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005191948] [2024-11-14 03:16:00,289 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:16:00,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803599816] [2024-11-14 03:16:00,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803599816] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:16:00,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [163070058] [2024-11-14 03:16:00,292 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 03:16:00,292 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:16:00,292 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:16:00,292 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:16:00,292 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:16:01,015 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2024-11-14 03:16:01,017 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:16:03,996 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5219#(<= 1 ~ARR_SIZE~0)' at error location [2024-11-14 03:16:03,996 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:16:03,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:16:03,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-11-14 03:16:03,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511769288] [2024-11-14 03:16:03,996 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-14 03:16:03,997 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-14 03:16:03,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:16:03,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-14 03:16:03,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=2271, Unknown=0, NotChecked=0, Total=2550 [2024-11-14 03:16:03,998 INFO L87 Difference]: Start difference. First operand 112 states and 144 transitions. Second operand has 24 states, 19 states have (on average 1.263157894736842) internal successors, (24), 21 states have internal predecessors, (24), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-14 03:16:07,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:16:07,027 INFO L93 Difference]: Finished difference Result 154 states and 198 transitions. [2024-11-14 03:16:07,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-14 03:16:07,028 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 1.263157894736842) internal successors, (24), 21 states have internal predecessors, (24), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 35 [2024-11-14 03:16:07,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:16:07,029 INFO L225 Difference]: With dead ends: 154 [2024-11-14 03:16:07,029 INFO L226 Difference]: Without dead ends: 151 [2024-11-14 03:16:07,031 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1186 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=431, Invalid=3475, Unknown=0, NotChecked=0, Total=3906 [2024-11-14 03:16:07,032 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 72 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:16:07,033 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 147 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 712 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-14 03:16:07,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-11-14 03:16:07,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 126. [2024-11-14 03:16:07,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 78 states have (on average 1.141025641025641) internal successors, (89), 79 states have internal predecessors, (89), 37 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) [2024-11-14 03:16:07,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 163 transitions. [2024-11-14 03:16:07,089 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 163 transitions. Word has length 35 [2024-11-14 03:16:07,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:16:07,090 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 163 transitions. [2024-11-14 03:16:07,090 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 1.263157894736842) internal successors, (24), 21 states have internal predecessors, (24), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-14 03:16:07,090 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 163 transitions. [2024-11-14 03:16:07,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-14 03:16:07,091 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:16:07,091 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:16:07,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-14 03:16:07,292 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-14 03:16:07,292 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:16:07,292 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:16:07,292 INFO L85 PathProgramCache]: Analyzing trace with hash -842020034, now seen corresponding path program 11 times [2024-11-14 03:16:07,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:16:07,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387661495] [2024-11-14 03:16:07,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:07,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:16:07,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:07,594 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-14 03:16:07,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:16:07,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387661495] [2024-11-14 03:16:07,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387661495] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:16:07,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028253542] [2024-11-14 03:16:07,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:16:07,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:16:07,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:16:07,599 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:16:07,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 03:16:07,754 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-14 03:16:07,754 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:16:07,756 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-14 03:16:07,759 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:16:07,953 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 03:16:07,954 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:16:08,116 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-14 03:16:08,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028253542] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:16:08,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [600965792] [2024-11-14 03:16:08,119 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 03:16:08,119 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:16:08,119 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:16:08,120 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:16:08,120 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:16:08,902 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2024-11-14 03:16:08,905 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:16:10,876 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6132#(<= 1 ~ARR_SIZE~0)' at error location [2024-11-14 03:16:10,877 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:16:10,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:16:10,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2024-11-14 03:16:10,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630830475] [2024-11-14 03:16:10,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:16:10,877 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-14 03:16:10,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:16:10,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-14 03:16:10,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1153, Unknown=0, NotChecked=0, Total=1406 [2024-11-14 03:16:10,879 INFO L87 Difference]: Start difference. First operand 126 states and 163 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-14 03:16:12,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:16:12,270 INFO L93 Difference]: Finished difference Result 352 states and 485 transitions. [2024-11-14 03:16:12,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-14 03:16:12,271 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 36 [2024-11-14 03:16:12,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:16:12,275 INFO L225 Difference]: With dead ends: 352 [2024-11-14 03:16:12,277 INFO L226 Difference]: Without dead ends: 342 [2024-11-14 03:16:12,278 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 74 SyntacticMatches, 9 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=406, Invalid=1946, Unknown=0, NotChecked=0, Total=2352 [2024-11-14 03:16:12,279 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 261 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 343 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 343 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:16:12,280 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 173 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [343 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 03:16:12,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2024-11-14 03:16:12,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 137. [2024-11-14 03:16:12,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 84 states have (on average 1.130952380952381) internal successors, (95), 85 states have internal predecessors, (95), 41 states have call successors, (41), 11 states have call predecessors, (41), 11 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2024-11-14 03:16:12,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 177 transitions. [2024-11-14 03:16:12,372 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 177 transitions. Word has length 36 [2024-11-14 03:16:12,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:16:12,373 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 177 transitions. [2024-11-14 03:16:12,373 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-14 03:16:12,373 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 177 transitions. [2024-11-14 03:16:12,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-14 03:16:12,374 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:16:12,375 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:16:12,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-14 03:16:12,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-14 03:16:12,579 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:16:12,579 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:16:12,580 INFO L85 PathProgramCache]: Analyzing trace with hash -31445423, now seen corresponding path program 12 times [2024-11-14 03:16:12,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:16:12,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423007963] [2024-11-14 03:16:12,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:12,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:16:12,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:12,886 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-14 03:16:12,886 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:16:12,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423007963] [2024-11-14 03:16:12,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423007963] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:16:12,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430890534] [2024-11-14 03:16:12,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:16:12,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:16:12,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:16:12,890 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:16:12,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 03:16:13,160 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:16:13,160 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:16:13,166 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-14 03:16:13,168 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:16:13,337 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 03:16:13,337 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:16:13,523 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-14 03:16:13,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430890534] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:16:13,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [323151930] [2024-11-14 03:16:13,525 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 03:16:13,528 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:16:13,528 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:16:13,528 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:16:13,528 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:16:14,272 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2024-11-14 03:16:14,274 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:16:16,305 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7189#(<= 1 ~ARR_SIZE~0)' at error location [2024-11-14 03:16:16,306 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:16:16,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:16:16,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2024-11-14 03:16:16,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786002022] [2024-11-14 03:16:16,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:16:16,307 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-14 03:16:16,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:16:16,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-14 03:16:16,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1152, Unknown=0, NotChecked=0, Total=1406 [2024-11-14 03:16:16,308 INFO L87 Difference]: Start difference. First operand 137 states and 177 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-14 03:16:17,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:16:17,186 INFO L93 Difference]: Finished difference Result 201 states and 264 transitions. [2024-11-14 03:16:17,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-14 03:16:17,187 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 36 [2024-11-14 03:16:17,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:16:17,188 INFO L225 Difference]: With dead ends: 201 [2024-11-14 03:16:17,189 INFO L226 Difference]: Without dead ends: 198 [2024-11-14 03:16:17,190 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 73 SyntacticMatches, 10 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=337, Invalid=1555, Unknown=0, NotChecked=0, Total=1892 [2024-11-14 03:16:17,190 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 77 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:16:17,191 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 260 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:16:17,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2024-11-14 03:16:17,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 138. [2024-11-14 03:16:17,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 85 states have (on average 1.1294117647058823) internal successors, (96), 86 states have internal predecessors, (96), 41 states have call successors, (41), 11 states have call predecessors, (41), 11 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2024-11-14 03:16:17,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 178 transitions. [2024-11-14 03:16:17,270 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 178 transitions. Word has length 36 [2024-11-14 03:16:17,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:16:17,271 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 178 transitions. [2024-11-14 03:16:17,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-14 03:16:17,271 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 178 transitions. [2024-11-14 03:16:17,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-14 03:16:17,272 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:16:17,272 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:16:17,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-14 03:16:17,473 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-14 03:16:17,473 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:16:17,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:16:17,473 INFO L85 PathProgramCache]: Analyzing trace with hash -976198678, now seen corresponding path program 13 times [2024-11-14 03:16:17,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:16:17,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753022333] [2024-11-14 03:16:17,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:17,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:16:17,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:16:17,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1437771708] [2024-11-14 03:16:17,557 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:16:17,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:16:17,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:16:17,560 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:16:17,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 03:16:17,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:17,909 WARN L253 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 112 conjuncts are in the unsatisfiable core [2024-11-14 03:16:17,916 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:16:17,933 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 [2024-11-14 03:16:17,986 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 [2024-11-14 03:16:18,067 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 [2024-11-14 03:16:18,184 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 [2024-11-14 03:16:18,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 75 [2024-11-14 03:16:18,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 95 [2024-11-14 03:16:22,934 INFO L349 Elim1Store]: treesize reduction 780, result has 24.3 percent of original size [2024-11-14 03:16:22,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 20 select indices, 20 select index equivalence classes, 13 disjoint index pairs (out of 190 index pairs), introduced 20 new quantified variables, introduced 120 case distinctions, treesize of input 174 treesize of output 331 [2024-11-14 03:16:26,095 INFO L349 Elim1Store]: treesize reduction 37, result has 9.8 percent of original size [2024-11-14 03:16:26,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 354 treesize of output 166 [2024-11-14 03:16:26,209 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 03:16:26,209 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:16:29,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:16:29,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753022333] [2024-11-14 03:16:29,640 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:16:29,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437771708] [2024-11-14 03:16:29,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437771708] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:16:29,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [320834171] [2024-11-14 03:16:29,644 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 03:16:29,644 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:16:29,644 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:16:29,644 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:16:29,644 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:16:30,422 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2024-11-14 03:16:30,425 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:16:34,810 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7787#(<= 1 ~ARR_SIZE~0)' at error location [2024-11-14 03:16:34,810 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:16:34,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:16:34,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2024-11-14 03:16:34,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041909677] [2024-11-14 03:16:34,811 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-14 03:16:34,811 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-14 03:16:34,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:16:34,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-14 03:16:34,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=2977, Unknown=0, NotChecked=0, Total=3306 [2024-11-14 03:16:34,814 INFO L87 Difference]: Start difference. First operand 138 states and 178 transitions. Second operand has 27 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-14 03:16:40,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:16:40,619 INFO L93 Difference]: Finished difference Result 182 states and 234 transitions. [2024-11-14 03:16:40,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-14 03:16:40,620 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 37 [2024-11-14 03:16:40,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:16:40,621 INFO L225 Difference]: With dead ends: 182 [2024-11-14 03:16:40,621 INFO L226 Difference]: Without dead ends: 179 [2024-11-14 03:16:40,623 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1545 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=527, Invalid=4585, Unknown=0, NotChecked=0, Total=5112 [2024-11-14 03:16:40,624 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 79 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:16:40,625 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 177 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 963 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-14 03:16:40,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2024-11-14 03:16:40,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 152. [2024-11-14 03:16:40,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 95 states have internal predecessors, (107), 45 states have call successors, (45), 12 states have call predecessors, (45), 12 states have return successors, (45), 44 states have call predecessors, (45), 45 states have call successors, (45) [2024-11-14 03:16:40,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 197 transitions. [2024-11-14 03:16:40,740 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 197 transitions. Word has length 37 [2024-11-14 03:16:40,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:16:40,741 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 197 transitions. [2024-11-14 03:16:40,741 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-14 03:16:40,742 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 197 transitions. [2024-11-14 03:16:40,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-14 03:16:40,743 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:16:40,743 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:16:40,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-14 03:16:40,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-14 03:16:40,944 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:16:40,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:16:40,945 INFO L85 PathProgramCache]: Analyzing trace with hash -198778511, now seen corresponding path program 14 times [2024-11-14 03:16:40,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:16:40,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047133171] [2024-11-14 03:16:40,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:40,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:16:40,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:41,363 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-14 03:16:41,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:16:41,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047133171] [2024-11-14 03:16:41,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047133171] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:16:41,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166622498] [2024-11-14 03:16:41,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:16:41,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:16:41,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:16:41,366 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:16:41,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-14 03:16:41,586 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-14 03:16:41,586 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:16:41,588 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-14 03:16:41,590 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:16:41,790 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 29 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 03:16:41,790 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:16:41,961 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-14 03:16:41,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166622498] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:16:41,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1629686698] [2024-11-14 03:16:41,963 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 03:16:41,964 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:16:41,964 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:16:41,964 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:16:41,964 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:16:42,675 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2024-11-14 03:16:42,677 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:16:44,881 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8825#(<= 1 ~ARR_SIZE~0)' at error location [2024-11-14 03:16:44,881 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:16:44,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:16:44,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2024-11-14 03:16:44,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682802596] [2024-11-14 03:16:44,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:16:44,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-14 03:16:44,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:16:44,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-14 03:16:44,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1347, Unknown=0, NotChecked=0, Total=1640 [2024-11-14 03:16:44,884 INFO L87 Difference]: Start difference. First operand 152 states and 197 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-14 03:16:46,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:16:46,725 INFO L93 Difference]: Finished difference Result 496 states and 686 transitions. [2024-11-14 03:16:46,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-14 03:16:46,726 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 38 [2024-11-14 03:16:46,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:16:46,730 INFO L225 Difference]: With dead ends: 496 [2024-11-14 03:16:46,730 INFO L226 Difference]: Without dead ends: 485 [2024-11-14 03:16:46,732 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 77 SyntacticMatches, 11 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=563, Invalid=2743, Unknown=0, NotChecked=0, Total=3306 [2024-11-14 03:16:46,733 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 440 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 576 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 576 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:16:46,734 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 213 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [576 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 03:16:46,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2024-11-14 03:16:46,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 163. [2024-11-14 03:16:46,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 100 states have (on average 1.13) internal successors, (113), 101 states have internal predecessors, (113), 49 states have call successors, (49), 13 states have call predecessors, (49), 13 states have return successors, (49), 48 states have call predecessors, (49), 49 states have call successors, (49) [2024-11-14 03:16:46,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 211 transitions. [2024-11-14 03:16:46,894 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 211 transitions. Word has length 38 [2024-11-14 03:16:46,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:16:46,894 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 211 transitions. [2024-11-14 03:16:46,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-14 03:16:46,895 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 211 transitions. [2024-11-14 03:16:46,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-14 03:16:46,896 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:16:46,896 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:16:46,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-14 03:16:47,096 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-14 03:16:47,097 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:16:47,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:16:47,097 INFO L85 PathProgramCache]: Analyzing trace with hash -840769346, now seen corresponding path program 15 times [2024-11-14 03:16:47,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:16:47,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698424638] [2024-11-14 03:16:47,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:47,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:16:47,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:47,509 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-14 03:16:47,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:16:47,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698424638] [2024-11-14 03:16:47,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698424638] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:16:47,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631186375] [2024-11-14 03:16:47,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:16:47,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:16:47,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:16:47,514 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:16:47,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-14 03:16:47,849 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:16:47,849 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:16:47,852 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-14 03:16:47,854 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:16:48,070 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 23 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 03:16:48,071 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:16:48,302 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-14 03:16:48,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631186375] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:16:48,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [314793181] [2024-11-14 03:16:48,304 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 03:16:48,304 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:16:48,304 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:16:48,304 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:16:48,304 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:16:49,066 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2024-11-14 03:16:49,068 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:16:51,080 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10183#(and (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (<= 1 ~ARR_SIZE~0))' at error location [2024-11-14 03:16:51,080 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:16:51,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:16:51,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2024-11-14 03:16:51,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951365340] [2024-11-14 03:16:51,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:16:51,081 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-14 03:16:51,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:16:51,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-14 03:16:51,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=1365, Unknown=0, NotChecked=0, Total=1640 [2024-11-14 03:16:51,083 INFO L87 Difference]: Start difference. First operand 163 states and 211 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-14 03:16:52,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:16:52,013 INFO L93 Difference]: Finished difference Result 242 states and 318 transitions. [2024-11-14 03:16:52,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-14 03:16:52,014 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 38 [2024-11-14 03:16:52,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:16:52,016 INFO L225 Difference]: With dead ends: 242 [2024-11-14 03:16:52,016 INFO L226 Difference]: Without dead ends: 239 [2024-11-14 03:16:52,018 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 76 SyntacticMatches, 12 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=368, Invalid=1888, Unknown=0, NotChecked=0, Total=2256 [2024-11-14 03:16:52,018 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 150 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:16:52,019 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 269 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:16:52,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2024-11-14 03:16:52,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 164. [2024-11-14 03:16:52,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 101 states have (on average 1.1287128712871286) internal successors, (114), 102 states have internal predecessors, (114), 49 states have call successors, (49), 13 states have call predecessors, (49), 13 states have return successors, (49), 48 states have call predecessors, (49), 49 states have call successors, (49) [2024-11-14 03:16:52,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 212 transitions. [2024-11-14 03:16:52,175 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 212 transitions. Word has length 38 [2024-11-14 03:16:52,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:16:52,175 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 212 transitions. [2024-11-14 03:16:52,175 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-14 03:16:52,175 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 212 transitions. [2024-11-14 03:16:52,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-14 03:16:52,176 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:16:52,176 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:16:52,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-14 03:16:52,377 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:16:52,377 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:16:52,378 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:16:52,378 INFO L85 PathProgramCache]: Analyzing trace with hash -295436515, now seen corresponding path program 16 times [2024-11-14 03:16:52,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:16:52,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354102017] [2024-11-14 03:16:52,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:52,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:16:52,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:16:52,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1300160185] [2024-11-14 03:16:52,497 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:16:52,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:16:52,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:16:52,499 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:16:52,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-14 03:16:52,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:52,966 WARN L253 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 125 conjuncts are in the unsatisfiable core [2024-11-14 03:16:52,972 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:16:52,993 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 [2024-11-14 03:16:53,044 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 [2024-11-14 03:16:53,105 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 [2024-11-14 03:16:53,203 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 [2024-11-14 03:16:53,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 75 [2024-11-14 03:16:53,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 95 [2024-11-14 03:16:53,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 16 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 115 [2024-11-14 03:16:59,173 INFO L349 Elim1Store]: treesize reduction 936, result has 24.3 percent of original size [2024-11-14 03:16:59,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 24 select indices, 24 select index equivalence classes, 18 disjoint index pairs (out of 276 index pairs), introduced 24 new quantified variables, introduced 168 case distinctions, treesize of input 202 treesize of output 393 [2024-11-14 03:17:04,740 INFO L349 Elim1Store]: treesize reduction 45, result has 8.2 percent of original size [2024-11-14 03:17:04,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 15 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 470 treesize of output 218 [2024-11-14 03:17:04,874 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 03:17:04,874 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:17:08,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:17:08,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354102017] [2024-11-14 03:17:08,645 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:17:08,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300160185] [2024-11-14 03:17:08,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300160185] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:17:08,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1091665097] [2024-11-14 03:17:08,647 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 03:17:08,647 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:17:08,647 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:17:08,647 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:17:08,647 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:17:09,351 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2024-11-14 03:17:09,353 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:17:13,307 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10894#(<= 1 ~ARR_SIZE~0)' at error location [2024-11-14 03:17:13,307 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:17:13,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:17:13,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2024-11-14 03:17:13,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056143356] [2024-11-14 03:17:13,308 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-14 03:17:13,308 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-14 03:17:13,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:17:13,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-14 03:17:13,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=3315, Unknown=0, NotChecked=0, Total=3660 [2024-11-14 03:17:13,310 INFO L87 Difference]: Start difference. First operand 164 states and 212 transitions. Second operand has 29 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-14 03:17:20,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:17:20,969 INFO L93 Difference]: Finished difference Result 210 states and 270 transitions. [2024-11-14 03:17:20,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-14 03:17:20,970 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 39 [2024-11-14 03:17:20,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:17:20,971 INFO L225 Difference]: With dead ends: 210 [2024-11-14 03:17:20,971 INFO L226 Difference]: Without dead ends: 207 [2024-11-14 03:17:20,973 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1682 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=554, Invalid=5146, Unknown=0, NotChecked=0, Total=5700 [2024-11-14 03:17:20,974 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 82 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 1098 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:17:20,974 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 186 Invalid, 1178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1098 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2024-11-14 03:17:20,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2024-11-14 03:17:21,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 178. [2024-11-14 03:17:21,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 111 states have internal predecessors, (125), 53 states have call successors, (53), 14 states have call predecessors, (53), 14 states have return successors, (53), 52 states have call predecessors, (53), 53 states have call successors, (53) [2024-11-14 03:17:21,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 231 transitions. [2024-11-14 03:17:21,177 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 231 transitions. Word has length 39 [2024-11-14 03:17:21,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:17:21,178 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 231 transitions. [2024-11-14 03:17:21,178 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-14 03:17:21,178 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 231 transitions. [2024-11-14 03:17:21,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-14 03:17:21,179 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:17:21,180 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:17:21,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-14 03:17:21,384 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:17:21,384 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:17:21,384 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:17:21,384 INFO L85 PathProgramCache]: Analyzing trace with hash -569987938, now seen corresponding path program 17 times [2024-11-14 03:17:21,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:17:21,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232780239] [2024-11-14 03:17:21,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:17:21,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:17:21,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:17:21,768 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-14 03:17:21,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:17:21,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232780239] [2024-11-14 03:17:21,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232780239] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:17:21,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285413508] [2024-11-14 03:17:21,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:17:21,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:17:21,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:17:21,772 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:17:21,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-14 03:17:22,031 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-14 03:17:22,032 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:17:22,036 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-14 03:17:22,038 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:17:22,312 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 03:17:22,312 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:17:22,537 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-14 03:17:22,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285413508] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:17:22,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1980582830] [2024-11-14 03:17:22,539 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 03:17:22,539 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:17:22,539 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:17:22,540 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:17:22,540 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:17:23,165 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2024-11-14 03:17:23,167 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:17:25,378 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12051#(<= 1 ~ARR_SIZE~0)' at error location [2024-11-14 03:17:25,378 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:17:25,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:17:25,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2024-11-14 03:17:25,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75799794] [2024-11-14 03:17:25,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:17:25,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-14 03:17:25,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:17:25,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-14 03:17:25,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=1555, Unknown=0, NotChecked=0, Total=1892 [2024-11-14 03:17:25,380 INFO L87 Difference]: Start difference. First operand 178 states and 231 transitions. Second operand has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-14 03:17:27,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:17:27,719 INFO L93 Difference]: Finished difference Result 667 states and 924 transitions. [2024-11-14 03:17:27,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-14 03:17:27,720 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 40 [2024-11-14 03:17:27,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:17:27,725 INFO L225 Difference]: With dead ends: 667 [2024-11-14 03:17:27,725 INFO L226 Difference]: Without dead ends: 655 [2024-11-14 03:17:27,727 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 80 SyntacticMatches, 13 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1705 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=766, Invalid=3790, Unknown=0, NotChecked=0, Total=4556 [2024-11-14 03:17:27,728 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 586 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 728 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 1302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 728 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:17:27,728 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [618 Valid, 335 Invalid, 1302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [728 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-14 03:17:27,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2024-11-14 03:17:27,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 189. [2024-11-14 03:17:27,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 116 states have (on average 1.1293103448275863) internal successors, (131), 117 states have internal predecessors, (131), 57 states have call successors, (57), 15 states have call predecessors, (57), 15 states have return successors, (57), 56 states have call predecessors, (57), 57 states have call successors, (57) [2024-11-14 03:17:27,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 245 transitions. [2024-11-14 03:17:27,976 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 245 transitions. Word has length 40 [2024-11-14 03:17:27,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:17:27,977 INFO L471 AbstractCegarLoop]: Abstraction has 189 states and 245 transitions. [2024-11-14 03:17:27,977 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-14 03:17:27,977 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 245 transitions. [2024-11-14 03:17:27,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-14 03:17:27,978 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:17:27,979 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:17:28,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-14 03:17:28,183 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:17:28,183 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:17:28,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:17:28,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1003132657, now seen corresponding path program 18 times [2024-11-14 03:17:28,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:17:28,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915490111] [2024-11-14 03:17:28,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:17:28,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:17:28,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:17:28,607 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-14 03:17:28,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:17:28,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915490111] [2024-11-14 03:17:28,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915490111] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:17:28,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628216755] [2024-11-14 03:17:28,608 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:17:28,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:17:28,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:17:28,611 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:17:28,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-14 03:17:29,045 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:17:29,045 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:17:29,053 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-14 03:17:29,055 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:17:29,344 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 03:17:29,344 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:17:29,656 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-14 03:17:29,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628216755] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:17:29,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1906396899] [2024-11-14 03:17:29,658 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 03:17:29,660 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:17:29,660 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:17:29,660 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:17:29,660 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:17:30,349 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2024-11-14 03:17:30,352 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:17:32,382 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13756#(<= 1 ~ARR_SIZE~0)' at error location [2024-11-14 03:17:32,382 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:17:32,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:17:32,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2024-11-14 03:17:32,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715238245] [2024-11-14 03:17:32,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:17:32,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-14 03:17:32,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:17:32,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-14 03:17:32,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=1570, Unknown=0, NotChecked=0, Total=1892 [2024-11-14 03:17:32,384 INFO L87 Difference]: Start difference. First operand 189 states and 245 transitions. Second operand has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-14 03:17:33,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:17:33,608 INFO L93 Difference]: Finished difference Result 284 states and 373 transitions. [2024-11-14 03:17:33,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-14 03:17:33,608 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 40 [2024-11-14 03:17:33,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:17:33,610 INFO L225 Difference]: With dead ends: 284 [2024-11-14 03:17:33,610 INFO L226 Difference]: Without dead ends: 281 [2024-11-14 03:17:33,611 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 79 SyntacticMatches, 14 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=456, Invalid=2196, Unknown=0, NotChecked=0, Total=2652 [2024-11-14 03:17:33,612 INFO L432 NwaCegarLoop]: 74 mSDtfsCounter, 149 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:17:33,612 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 379 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 03:17:33,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2024-11-14 03:17:33,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 190. [2024-11-14 03:17:33,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 117 states have (on average 1.1282051282051282) internal successors, (132), 118 states have internal predecessors, (132), 57 states have call successors, (57), 15 states have call predecessors, (57), 15 states have return successors, (57), 56 states have call predecessors, (57), 57 states have call successors, (57) [2024-11-14 03:17:33,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 246 transitions. [2024-11-14 03:17:33,785 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 246 transitions. Word has length 40 [2024-11-14 03:17:33,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:17:33,785 INFO L471 AbstractCegarLoop]: Abstraction has 190 states and 246 transitions. [2024-11-14 03:17:33,785 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-14 03:17:33,785 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 246 transitions. [2024-11-14 03:17:33,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-14 03:17:33,786 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:17:33,786 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:17:33,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-14 03:17:33,987 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-14 03:17:33,987 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:17:33,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:17:33,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1030950730, now seen corresponding path program 19 times [2024-11-14 03:17:33,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:17:33,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225289248] [2024-11-14 03:17:33,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:17:33,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:17:34,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:17:34,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1202767524] [2024-11-14 03:17:34,085 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:17:34,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:17:34,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:17:34,088 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:17:34,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-14 03:17:34,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:17:34,596 WARN L253 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 138 conjuncts are in the unsatisfiable core [2024-11-14 03:17:34,603 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:17:34,631 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 [2024-11-14 03:17:34,675 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 [2024-11-14 03:17:34,737 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 [2024-11-14 03:17:34,827 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 [2024-11-14 03:17:34,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 75 [2024-11-14 03:17:35,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 95 [2024-11-14 03:17:35,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 16 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 115 [2024-11-14 03:17:35,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 22 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 135 [2024-11-14 03:17:42,101 INFO L349 Elim1Store]: treesize reduction 1092, result has 24.3 percent of original size [2024-11-14 03:17:42,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 28 select indices, 28 select index equivalence classes, 24 disjoint index pairs (out of 378 index pairs), introduced 28 new quantified variables, introduced 224 case distinctions, treesize of input 230 treesize of output 455 [2024-11-14 03:17:50,441 INFO L349 Elim1Store]: treesize reduction 53, result has 7.0 percent of original size [2024-11-14 03:17:50,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 21 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 600 treesize of output 276 [2024-11-14 03:17:50,624 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 03:17:50,624 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:17:55,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:17:55,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225289248] [2024-11-14 03:17:55,361 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:17:55,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202767524] [2024-11-14 03:17:55,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202767524] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:17:55,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [700849939] [2024-11-14 03:17:55,363 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 03:17:55,363 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:17:55,363 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:17:55,364 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:17:55,364 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:17:56,086 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2024-11-14 03:17:56,089 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:18:01,199 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14582#(<= 1 ~ARR_SIZE~0)' at error location [2024-11-14 03:18:01,199 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:18:01,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:18:01,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2024-11-14 03:18:01,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312796869] [2024-11-14 03:18:01,200 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-14 03:18:01,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-14 03:18:01,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:18:01,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-14 03:18:01,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=3671, Unknown=0, NotChecked=0, Total=4032 [2024-11-14 03:18:01,202 INFO L87 Difference]: Start difference. First operand 190 states and 246 transitions. Second operand has 31 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-14 03:18:10,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:18:10,914 INFO L93 Difference]: Finished difference Result 238 states and 306 transitions. [2024-11-14 03:18:10,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-14 03:18:10,915 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 41 [2024-11-14 03:18:10,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:18:10,917 INFO L225 Difference]: With dead ends: 238 [2024-11-14 03:18:10,917 INFO L226 Difference]: Without dead ends: 235 [2024-11-14 03:18:10,919 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1825 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=581, Invalid=5739, Unknown=0, NotChecked=0, Total=6320 [2024-11-14 03:18:10,921 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 74 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 1375 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 1444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:18:10,921 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 217 Invalid, 1444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1375 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2024-11-14 03:18:10,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2024-11-14 03:18:11,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 204. [2024-11-14 03:18:11,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 127 states have internal predecessors, (143), 61 states have call successors, (61), 16 states have call predecessors, (61), 16 states have return successors, (61), 60 states have call predecessors, (61), 61 states have call successors, (61) [2024-11-14 03:18:11,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 265 transitions. [2024-11-14 03:18:11,209 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 265 transitions. Word has length 41 [2024-11-14 03:18:11,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:18:11,210 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 265 transitions. [2024-11-14 03:18:11,210 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-14 03:18:11,210 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 265 transitions. [2024-11-14 03:18:11,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-14 03:18:11,212 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:18:11,212 INFO L215 NwaCegarLoop]: trace histogram [9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:18:11,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-14 03:18:11,412 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-14 03:18:11,413 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:18:11,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:18:11,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1844646062, now seen corresponding path program 1 times [2024-11-14 03:18:11,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:18:11,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043991423] [2024-11-14 03:18:11,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:18:11,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:18:11,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:18:11,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [224663467] [2024-11-14 03:18:11,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:18:11,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:18:11,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:18:11,463 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:18:11,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-14 03:18:11,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:18:11,656 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-14 03:18:11,659 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:18:11,670 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 [2024-11-14 03:18:12,026 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 18 [2024-11-14 03:18:12,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 03:18:12,394 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 44 proven. 31 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 03:18:12,395 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:18:12,500 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:18:12,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043991423] [2024-11-14 03:18:12,501 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:18:12,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224663467] [2024-11-14 03:18:12,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224663467] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:18:12,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1023856223] [2024-11-14 03:18:12,502 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 03:18:12,502 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:18:12,502 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:18:12,502 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:18:12,503 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:18:15,755 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2024-11-14 03:18:15,756 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:18:16,005 WARN L873 $PredicateComparison]: unable to prove that (let ((.cse0 (= |c_ULTIMATE.start_main_~count~0#1| 1))) (and (or .cse0 (< 0 c_~ARR_SIZE~0)) (let ((.cse7 (<= 1 c_~ARR_SIZE~0))) (or (and (exists ((|v_#memory_int_207| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~index1~0#1_80| Int) (|v_ULTIMATE.start_main_~count~0#1_578| Int) (|v_ULTIMATE.start_main_~index2~0#1_90| Int)) (let ((.cse4 (select |v_#memory_int_207| |c_ULTIMATE.start_main_~#array1~0#1.base|)) (.cse5 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (* |v_ULTIMATE.start_main_~index1~0#1_80| 4))) (.cse2 (+ (* |v_ULTIMATE.start_main_~index2~0#1_90| 4) |c_ULTIMATE.start_main_~#array2~0#1.offset|))) (and (= (let ((.cse3 (* |c_ULTIMATE.start_main_~num~0#1| |v_ULTIMATE.start_main_~count~0#1_578|))) (let ((.cse1 (store |v_#memory_int_207| |c_ULTIMATE.start_main_~#array1~0#1.base| (store .cse4 .cse5 (* .cse3 |c_ULTIMATE.start_main_~num~0#1|))))) (store .cse1 |c_ULTIMATE.start_main_~#array2~0#1.base| (store (select .cse1 |c_ULTIMATE.start_main_~#array2~0#1.base|) .cse2 .cse3)))) |c_#memory_int|) (<= 0 |v_ULTIMATE.start_main_~index1~0#1_80|) (<= 0 |v_ULTIMATE.start_main_~index2~0#1_90|) (= (select .cse4 .cse5) 0) (= 0 (select (select |v_#memory_int_207| |c_ULTIMATE.start_main_~#array2~0#1.base|) .cse2)) (let ((.cse6 (= 200 |v_ULTIMATE.start_main_~count~0#1_578|))) (or (and .cse0 .cse6) (and (= |c_ULTIMATE.start_main_~count~0#1| (+ |v_ULTIMATE.start_main_~count~0#1_578| 1)) (not .cse6)))) (<= |v_ULTIMATE.start_main_~index1~0#1_80| 32767) (<= |v_ULTIMATE.start_main_~index2~0#1_90| 32767) (<= 1 |v_ULTIMATE.start_main_~count~0#1_578|)))) .cse7 (exists ((|v_ULTIMATE.start_main_~temp~0#1_69| Int)) (and (<= |v_ULTIMATE.start_main_~temp~0#1_69| 2147483647) (not (= |v_ULTIMATE.start_main_~temp~0#1_69| 0)) (<= 0 (+ |v_ULTIMATE.start_main_~temp~0#1_69| 2147483648))))) (and .cse0 (exists ((|v_ULTIMATE.start_main_~count~0#1_574| Int)) (let ((.cse12 (= |c_ULTIMATE.start_main_~#array2~0#1.offset| 0)) (.cse13 (= |c_ULTIMATE.start_main_~#array1~0#1.offset| 0)) (.cse15 (= |c_ULTIMATE.start_main_~sum~0#1| 0))) (and (<= c_~ARR_SIZE~0 |v_ULTIMATE.start_main_~count~0#1_574|) (let ((.cse8 (= (+ |c_ULTIMATE.start_main_~num~0#1| 1) 0)) (.cse9 (<= 1 |c_#StackHeapBarrier|)) (.cse10 (<= c_~ARR_SIZE~0 32767)) (.cse11 (<= 2 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse14 (<= 2 |c_ULTIMATE.start_main_~#array1~0#1.base|))) (or (and .cse8 .cse9 (<= 1 |v_ULTIMATE.start_main_~count~0#1_574|) .cse10 .cse11 .cse7 .cse12 .cse13 .cse14 .cse15) (and .cse8 .cse9 .cse10 .cse11 .cse7 (<= 0 |v_ULTIMATE.start_main_~count~0#1_574|) .cse12 .cse13 .cse14 .cse15))) (or (and (= |v_ULTIMATE.start_main_~count~0#1_574| 0) .cse12 .cse13 .cse15) (and .cse12 .cse13 .cse15)))))))))) is different from true [2024-11-14 03:18:17,295 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15794#(<= 1 ~ARR_SIZE~0)' at error location [2024-11-14 03:18:17,295 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:18:17,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:18:17,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-11-14 03:18:17,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444782416] [2024-11-14 03:18:17,296 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-14 03:18:17,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-14 03:18:17,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:18:17,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-14 03:18:17,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=986, Unknown=5, NotChecked=64, Total=1190 [2024-11-14 03:18:17,298 INFO L87 Difference]: Start difference. First operand 204 states and 265 transitions. Second operand has 16 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 7 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-14 03:18:17,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:18:17,836 INFO L93 Difference]: Finished difference Result 213 states and 271 transitions. [2024-11-14 03:18:17,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-14 03:18:17,837 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 7 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) Word has length 46 [2024-11-14 03:18:17,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:18:17,839 INFO L225 Difference]: With dead ends: 213 [2024-11-14 03:18:17,839 INFO L226 Difference]: Without dead ends: 172 [2024-11-14 03:18:17,840 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=168, Invalid=1163, Unknown=5, NotChecked=70, Total=1406 [2024-11-14 03:18:17,840 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 3 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:18:17,841 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 79 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:18:17,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-11-14 03:18:18,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2024-11-14 03:18:18,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 109 states have (on average 1.1376146788990826) internal successors, (124), 109 states have internal predecessors, (124), 49 states have call successors, (49), 13 states have call predecessors, (49), 13 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2024-11-14 03:18:18,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 222 transitions. [2024-11-14 03:18:18,038 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 222 transitions. Word has length 46 [2024-11-14 03:18:18,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:18:18,038 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 222 transitions. [2024-11-14 03:18:18,038 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 7 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-14 03:18:18,038 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 222 transitions. [2024-11-14 03:18:18,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-14 03:18:18,039 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:18:18,040 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:18:18,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-14 03:18:18,244 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-14 03:18:18,244 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:18:18,244 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:18:18,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1893310993, now seen corresponding path program 20 times [2024-11-14 03:18:18,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:18:18,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723564006] [2024-11-14 03:18:18,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:18:18,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:18:18,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:18:18,737 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-14 03:18:18,738 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:18:18,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723564006] [2024-11-14 03:18:18,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723564006] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:18:18,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858715633] [2024-11-14 03:18:18,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:18:18,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:18:18,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:18:18,741 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:18:18,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-14 03:18:19,087 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-14 03:18:19,087 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:18:19,090 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-14 03:18:19,091 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:18:19,406 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 44 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 03:18:19,407 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:18:19,651 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-14 03:18:19,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858715633] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:18:19,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [94325202] [2024-11-14 03:18:19,653 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 03:18:19,653 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:18:19,653 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:18:19,654 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:18:19,654 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:18:20,425 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2024-11-14 03:18:20,428 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:18:22,958 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16727#(<= 1 ~ARR_SIZE~0)' at error location [2024-11-14 03:18:22,958 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:18:22,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:18:22,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2024-11-14 03:18:22,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551484094] [2024-11-14 03:18:22,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:18:22,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-14 03:18:22,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:18:22,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-14 03:18:22,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1777, Unknown=0, NotChecked=0, Total=2162 [2024-11-14 03:18:22,960 INFO L87 Difference]: Start difference. First operand 172 states and 222 transitions. Second operand has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-14 03:18:26,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:18:26,458 INFO L93 Difference]: Finished difference Result 763 states and 1056 transitions. [2024-11-14 03:18:26,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-14 03:18:26,459 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 42 [2024-11-14 03:18:26,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:18:26,464 INFO L225 Difference]: With dead ends: 763 [2024-11-14 03:18:26,464 INFO L226 Difference]: Without dead ends: 750 [2024-11-14 03:18:26,466 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 83 SyntacticMatches, 15 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2238 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=995, Invalid=5011, Unknown=0, NotChecked=0, Total=6006 [2024-11-14 03:18:26,467 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 805 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 986 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 1759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 986 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:18:26,468 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [841 Valid, 427 Invalid, 1759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [986 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-14 03:18:26,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2024-11-14 03:18:26,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 183. [2024-11-14 03:18:26,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 115 states have (on average 1.1304347826086956) internal successors, (130), 115 states have internal predecessors, (130), 53 states have call successors, (53), 14 states have call predecessors, (53), 14 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2024-11-14 03:18:26,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 236 transitions. [2024-11-14 03:18:26,832 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 236 transitions. Word has length 42 [2024-11-14 03:18:26,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:18:26,833 INFO L471 AbstractCegarLoop]: Abstraction has 183 states and 236 transitions. [2024-11-14 03:18:26,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-14 03:18:26,833 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 236 transitions. [2024-11-14 03:18:26,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-14 03:18:26,835 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:18:26,835 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:18:26,867 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-14 03:18:27,035 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:18:27,036 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:18:27,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:18:27,036 INFO L85 PathProgramCache]: Analyzing trace with hash -879558114, now seen corresponding path program 21 times [2024-11-14 03:18:27,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:18:27,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115053604] [2024-11-14 03:18:27,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:18:27,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:18:27,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:18:27,551 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-14 03:18:27,551 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:18:27,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115053604] [2024-11-14 03:18:27,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115053604] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:18:27,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497252239] [2024-11-14 03:18:27,552 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:18:27,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:18:27,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:18:27,556 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:18:27,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-14 03:18:28,023 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:18:28,023 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:18:28,025 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-14 03:18:28,027 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:18:28,265 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 03:18:28,265 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:18:28,517 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-14 03:18:28,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497252239] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:18:28,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [287279395] [2024-11-14 03:18:28,518 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 03:18:28,519 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:18:28,519 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:18:28,519 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:18:28,519 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:18:29,383 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2024-11-14 03:18:29,386 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:18:31,600 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18608#(<= 1 ~ARR_SIZE~0)' at error location [2024-11-14 03:18:31,601 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:18:31,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:18:31,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2024-11-14 03:18:31,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071115519] [2024-11-14 03:18:31,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:18:31,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-14 03:18:31,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:18:31,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-14 03:18:31,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1800, Unknown=0, NotChecked=0, Total=2162 [2024-11-14 03:18:31,603 INFO L87 Difference]: Start difference. First operand 183 states and 236 transitions. Second operand has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-14 03:18:33,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:18:33,246 INFO L93 Difference]: Finished difference Result 293 states and 384 transitions. [2024-11-14 03:18:33,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-14 03:18:33,246 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 42 [2024-11-14 03:18:33,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:18:33,248 INFO L225 Difference]: With dead ends: 293 [2024-11-14 03:18:33,248 INFO L226 Difference]: Without dead ends: 290 [2024-11-14 03:18:33,248 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 82 SyntacticMatches, 16 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=526, Invalid=2554, Unknown=0, NotChecked=0, Total=3080 [2024-11-14 03:18:33,249 INFO L432 NwaCegarLoop]: 84 mSDtfsCounter, 162 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:18:33,249 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 486 Invalid, 989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 03:18:33,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2024-11-14 03:18:33,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 184. [2024-11-14 03:18:33,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 116 states have (on average 1.1293103448275863) internal successors, (131), 116 states have internal predecessors, (131), 53 states have call successors, (53), 14 states have call predecessors, (53), 14 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2024-11-14 03:18:33,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 237 transitions. [2024-11-14 03:18:33,601 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 237 transitions. Word has length 42 [2024-11-14 03:18:33,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:18:33,602 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 237 transitions. [2024-11-14 03:18:33,602 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-14 03:18:33,602 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 237 transitions. [2024-11-14 03:18:33,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-14 03:18:33,604 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:18:33,605 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:18:33,637 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-14 03:18:33,806 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-14 03:18:33,807 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:18:33,807 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:18:33,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1497888323, now seen corresponding path program 22 times [2024-11-14 03:18:33,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:18:33,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411436404] [2024-11-14 03:18:33,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:18:33,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:18:33,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:18:33,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [239384550] [2024-11-14 03:18:33,910 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:18:33,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:18:33,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:18:33,913 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:18:33,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-14 03:18:34,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:18:34,649 WARN L253 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 151 conjuncts are in the unsatisfiable core [2024-11-14 03:18:34,658 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:18:34,683 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 [2024-11-14 03:18:34,738 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 [2024-11-14 03:18:34,803 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 [2024-11-14 03:18:34,913 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 [2024-11-14 03:18:35,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 75 [2024-11-14 03:18:35,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 95 [2024-11-14 03:18:35,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 16 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 115 [2024-11-14 03:18:35,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 22 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 135 [2024-11-14 03:18:35,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 29 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 155 [2024-11-14 03:18:43,955 INFO L349 Elim1Store]: treesize reduction 1248, result has 24.3 percent of original size [2024-11-14 03:18:43,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 32 select indices, 32 select index equivalence classes, 31 disjoint index pairs (out of 496 index pairs), introduced 32 new quantified variables, introduced 288 case distinctions, treesize of input 258 treesize of output 517 [2024-11-14 03:18:56,559 INFO L349 Elim1Store]: treesize reduction 61, result has 6.2 percent of original size [2024-11-14 03:18:56,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 28 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 744 treesize of output 340 [2024-11-14 03:18:56,762 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 80 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 03:18:56,763 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:19:02,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:19:02,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411436404] [2024-11-14 03:19:02,226 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:19:02,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239384550] [2024-11-14 03:19:02,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239384550] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:19:02,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [147585896] [2024-11-14 03:19:02,228 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 03:19:02,228 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:19:02,228 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:19:02,228 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:19:02,228 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:19:02,717 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2024-11-14 03:19:02,719 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:19:06,911 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19671#(and (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (<= 1 ~ARR_SIZE~0))' at error location [2024-11-14 03:19:06,912 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:19:06,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:19:06,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2024-11-14 03:19:06,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021333564] [2024-11-14 03:19:06,912 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-14 03:19:06,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-14 03:19:06,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:19:06,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-14 03:19:06,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=4151, Unknown=0, NotChecked=0, Total=4556 [2024-11-14 03:19:06,914 INFO L87 Difference]: Start difference. First operand 184 states and 237 transitions. Second operand has 33 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-14 03:19:17,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:19:17,673 INFO L93 Difference]: Finished difference Result 233 states and 298 transitions. [2024-11-14 03:19:17,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-14 03:19:17,674 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 43 [2024-11-14 03:19:17,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:19:17,675 INFO L225 Difference]: With dead ends: 233 [2024-11-14 03:19:17,675 INFO L226 Difference]: Without dead ends: 230 [2024-11-14 03:19:17,676 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2037 ImplicationChecksByTransitivity, 22.2s TimeCoverageRelationStatistics Valid=647, Invalid=6493, Unknown=0, NotChecked=0, Total=7140 [2024-11-14 03:19:17,677 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 78 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 1540 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 1622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:19:17,677 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 211 Invalid, 1622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1540 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2024-11-14 03:19:17,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2024-11-14 03:19:17,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 198. [2024-11-14 03:19:17,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 125 states have (on average 1.136) internal successors, (142), 125 states have internal predecessors, (142), 57 states have call successors, (57), 15 states have call predecessors, (57), 15 states have return successors, (57), 57 states have call predecessors, (57), 57 states have call successors, (57) [2024-11-14 03:19:17,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 256 transitions. [2024-11-14 03:19:17,969 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 256 transitions. Word has length 43 [2024-11-14 03:19:17,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:19:17,970 INFO L471 AbstractCegarLoop]: Abstraction has 198 states and 256 transitions. [2024-11-14 03:19:17,970 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-14 03:19:17,970 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 256 transitions. [2024-11-14 03:19:17,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-14 03:19:17,971 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:19:17,971 INFO L215 NwaCegarLoop]: trace histogram [9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:19:17,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-14 03:19:18,172 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:19:18,172 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:19:18,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:19:18,173 INFO L85 PathProgramCache]: Analyzing trace with hash -35303167, now seen corresponding path program 2 times [2024-11-14 03:19:18,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:19:18,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023302008] [2024-11-14 03:19:18,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:19:18,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:19:18,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:19:18,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1981014653] [2024-11-14 03:19:18,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:19:18,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:19:18,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:19:18,216 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:19:18,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-14 03:19:18,457 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-14 03:19:18,457 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:19:18,462 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-11-14 03:19:18,468 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:19:18,478 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 [2024-11-14 03:19:19,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2024-11-14 03:19:30,180 INFO L349 Elim1Store]: treesize reduction 1935, result has 6.3 percent of original size [2024-11-14 03:19:30,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 6 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 80 case distinctions, treesize of input 175 treesize of output 202 [2024-11-14 03:19:50,820 WARN L286 SmtUtils]: Spent 13.48s on a formula simplification. DAG size of input: 1026 DAG size of output: 743 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-11-14 03:19:50,820 INFO L349 Elim1Store]: treesize reduction 998, result has 69.1 percent of original size [2024-11-14 03:19:50,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 22 select indices, 22 select index equivalence classes, 5 disjoint index pairs (out of 231 index pairs), introduced 22 new quantified variables, introduced 199 case distinctions, treesize of input 335 treesize of output 2404 [2024-11-14 03:24:07,386 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-11-14 03:24:07,387 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:24:07,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023302008] [2024-11-14 03:24:07,387 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:24:07,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981014653] [2024-11-14 03:24:07,387 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2024-11-14 03:24:07,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1856678275] [2024-11-14 03:24:07,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2024-11-14 03:24:07,389 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 03:24:07,389 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:24:07,389 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:24:07,389 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:24:07,389 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:24:07,394 FATAL L? ?]: Ignoring exception! de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:177) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:132) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.checkSatTerm(SmtUtils.java:326) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.isFalse(SymbolicTools.java:220) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.RelationCheckUtil.isEqBottom_SolverAlphaSolver(RelationCheckUtil.java:56) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.ExplicitValueDomain.isEqBottom(ExplicitValueDomain.java:73) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.CompoundDomain.isEqBottom(CompoundDomain.java:84) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.StatsWrapperDomain.isEqBottom(StatsWrapperDomain.java:69) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.earlyExitAfterStep(DagInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:276) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:447) at java.base/java.io.OutputStream.write(OutputStream.java:167) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:125) at java.base/java.io.BufferedOutputStream.implFlush(BufferedOutputStream.java:252) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:246) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:412) at java.base/sun.nio.cs.StreamEncoder.lockedFlush(StreamEncoder.java:214) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:201) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:262) at java.base/java.io.BufferedWriter.implFlush(BufferedWriter.java:372) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:359) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:175) ... 44 more [2024-11-14 03:24:07,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:24:07,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2024-11-14 03:24:07,398 ERROR L171 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2024-11-14 03:24:07,398 INFO L325 BasicCegarLoop]: Counterexample might be feasible [2024-11-14 03:24:07,406 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-14 03:24:07,430 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-14 03:24:07,613 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:24:07,616 INFO L407 BasicCegarLoop]: Path program histogram: [22, 2, 1, 1, 1] [2024-11-14 03:24:07,629 INFO L173 ceAbstractionStarter]: Computing trace abstraction results [2024-11-14 03:24:07,632 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.11 03:24:07 BoogieIcfgContainer [2024-11-14 03:24:07,633 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-14 03:24:07,634 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-14 03:24:07,634 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-14 03:24:07,634 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-14 03:24:07,635 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:14:59" (3/4) ... [2024-11-14 03:24:07,637 INFO L145 WitnessPrinter]: No result that supports witness generation found [2024-11-14 03:24:07,638 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-14 03:24:07,639 INFO L158 Benchmark]: Toolchain (without parser) took 549294.41ms. Allocated memory was 117.4MB in the beginning and 352.3MB in the end (delta: 234.9MB). Free memory was 94.7MB in the beginning and 177.3MB in the end (delta: -82.6MB). Peak memory consumption was 148.7MB. Max. memory is 16.1GB. [2024-11-14 03:24:07,639 INFO L158 Benchmark]: CDTParser took 2.00ms. Allocated memory is still 142.6MB. Free memory is still 79.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 03:24:07,640 INFO L158 Benchmark]: CACSL2BoogieTranslator took 402.89ms. Allocated memory is still 117.4MB. Free memory was 94.7MB in the beginning and 83.3MB in the end (delta: 11.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-14 03:24:07,640 INFO L158 Benchmark]: Boogie Procedure Inliner took 59.88ms. Allocated memory is still 117.4MB. Free memory was 83.3MB in the beginning and 81.7MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 03:24:07,640 INFO L158 Benchmark]: Boogie Preprocessor took 44.41ms. Allocated memory is still 117.4MB. Free memory was 81.7MB in the beginning and 80.8MB in the end (delta: 938.1kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 03:24:07,640 INFO L158 Benchmark]: RCFGBuilder took 564.98ms. Allocated memory is still 117.4MB. Free memory was 80.8MB in the beginning and 66.3MB in the end (delta: 14.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-14 03:24:07,641 INFO L158 Benchmark]: TraceAbstraction took 548204.42ms. Allocated memory was 117.4MB in the beginning and 352.3MB in the end (delta: 234.9MB). Free memory was 65.7MB in the beginning and 177.3MB in the end (delta: -111.6MB). Peak memory consumption was 123.5MB. Max. memory is 16.1GB. [2024-11-14 03:24:07,641 INFO L158 Benchmark]: Witness Printer took 4.67ms. Allocated memory is still 352.3MB. Free memory is still 177.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 03:24:07,642 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 2.00ms. Allocated memory is still 142.6MB. Free memory is still 79.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 402.89ms. Allocated memory is still 117.4MB. Free memory was 94.7MB in the beginning and 83.3MB in the end (delta: 11.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 59.88ms. Allocated memory is still 117.4MB. Free memory was 83.3MB in the beginning and 81.7MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 44.41ms. Allocated memory is still 117.4MB. Free memory was 81.7MB in the beginning and 80.8MB in the end (delta: 938.1kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 564.98ms. Allocated memory is still 117.4MB. Free memory was 80.8MB in the beginning and 66.3MB in the end (delta: 14.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 548204.42ms. Allocated memory was 117.4MB in the beginning and 352.3MB in the end (delta: 234.9MB). Free memory was 65.7MB in the beginning and 177.3MB in the end (delta: -111.6MB). Peak memory consumption was 123.5MB. Max. memory is 16.1GB. * Witness Printer took 4.67ms. Allocated memory is still 352.3MB. Free memory is still 177.3MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 40]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L44] signed long long ARR_SIZE ; [L48] ARR_SIZE = __VERIFIER_nondet_short() [L49] CALL assume_abort_if_not(ARR_SIZE > 0) [L38] COND TRUE !cond [L49] RET assume_abort_if_not(ARR_SIZE > 0) [L51] int array1[ARR_SIZE] ; [L52] int array2[ARR_SIZE] ; [L53] int count = 0, num = -1 ; [L54] signed long long sum = 0 ; [L55] int temp ; [L56] short index1,index2 ; [L58] count=0 [L58] COND TRUE count=0 && index1 < ARR_SIZE) [L38] COND TRUE !cond [L71] RET assume_abort_if_not(index1>=0 && index1 < ARR_SIZE) [L72] CALL assume_abort_if_not(index2>=0 && index2 < ARR_SIZE) [L38] COND TRUE !cond [L72] RET assume_abort_if_not(index2>=0 && index2 < ARR_SIZE) [L73] EXPR array1[index1] [L73] CALL assume_abort_if_not(array1[index1] == 0) [L38] COND TRUE !cond [L73] RET assume_abort_if_not(array1[index1] == 0) [L74] EXPR array2[index2] [L74] CALL assume_abort_if_not(array2[index2] == 0) [L38] COND TRUE !cond [L74] RET assume_abort_if_not(array2[index2] == 0) [L76] array1[index1] = num * (num * count) [L77] array2[index2] = num * count [L78] COND FALSE !(count == 200) [L80] count++ [L82] temp = __VERIFIER_nondet_int() [L83] COND FALSE !(temp == 0) [L66] COND TRUE 1 [L69] index1 = __VERIFIER_nondet_short() [L70] index2 = __VERIFIER_nondet_short() [L71] CALL assume_abort_if_not(index1>=0 && index1 < ARR_SIZE) [L38] COND TRUE !cond [L71] RET assume_abort_if_not(index1>=0 && index1 < ARR_SIZE) [L72] CALL assume_abort_if_not(index2>=0 && index2 < ARR_SIZE) [L38] COND TRUE !cond [L72] RET assume_abort_if_not(index2>=0 && index2 < ARR_SIZE) [L73] EXPR array1[index1] [L73] CALL assume_abort_if_not(array1[index1] == 0) [L38] COND TRUE !cond [L73] RET assume_abort_if_not(array1[index1] == 0) [L74] EXPR array2[index2] [L74] CALL assume_abort_if_not(array2[index2] == 0) [L38] COND TRUE !cond [L74] RET assume_abort_if_not(array2[index2] == 0) [L76] array1[index1] = num * (num * count) [L77] array2[index2] = num * count [L78] COND FALSE !(count == 200) [L80] count++ [L82] temp = __VERIFIER_nondet_int() [L83] COND TRUE temp == 0 [L86] count=0 [L86] COND TRUE count main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E 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 -> 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 [2024-11-14 03:24:10,932 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 03:24:10,941 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 03:24:10,944 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 03:24:10,945 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 03:24:10,946 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 03:24:10,947 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/array-patterns/array4_pattern.c Unable to find full path for "g++" [2024-11-14 03:24:12,949 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 03:24:13,155 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 03:24:13,156 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/sv-benchmarks/c/array-patterns/array4_pattern.c [2024-11-14 03:24:13,164 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/data/9074ec340/85aa236970cd44638b710b972261f1d6/FLAGe7f20c243 [2024-11-14 03:24:13,512 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/data/9074ec340/85aa236970cd44638b710b972261f1d6 [2024-11-14 03:24:13,514 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 03:24:13,516 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 03:24:13,517 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 03:24:13,517 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 03:24:13,522 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 03:24:13,523 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:24:13" (1/1) ... [2024-11-14 03:24:13,524 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39c422be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:24:13, skipping insertion in model container [2024-11-14 03:24:13,525 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:24:13" (1/1) ... [2024-11-14 03:24:13,542 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 03:24:13,726 WARN L250 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_0bfe5381-5970-48eb-8355-05b894bd13c3/sv-benchmarks/c/array-patterns/array4_pattern.c[1835,1848] [2024-11-14 03:24:13,755 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:24:13,769 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 03:24:13,778 WARN L250 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_0bfe5381-5970-48eb-8355-05b894bd13c3/sv-benchmarks/c/array-patterns/array4_pattern.c[1835,1848] [2024-11-14 03:24:13,793 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:24:13,811 INFO L204 MainTranslator]: Completed translation [2024-11-14 03:24:13,812 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:24:13 WrapperNode [2024-11-14 03:24:13,812 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 03:24:13,813 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 03:24:13,813 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 03:24:13,813 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 03:24:13,821 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:24:13" (1/1) ... [2024-11-14 03:24:13,837 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:24:13" (1/1) ... [2024-11-14 03:24:13,875 INFO L138 Inliner]: procedures = 18, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 89 [2024-11-14 03:24:13,875 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 03:24:13,876 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 03:24:13,876 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 03:24:13,876 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 03:24:13,885 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:24:13" (1/1) ... [2024-11-14 03:24:13,886 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:24:13" (1/1) ... [2024-11-14 03:24:13,892 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:24:13" (1/1) ... [2024-11-14 03:24:13,893 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:24:13" (1/1) ... [2024-11-14 03:24:13,908 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:24:13" (1/1) ... [2024-11-14 03:24:13,916 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:24:13" (1/1) ... [2024-11-14 03:24:13,918 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:24:13" (1/1) ... [2024-11-14 03:24:13,923 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:24:13" (1/1) ... [2024-11-14 03:24:13,925 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 03:24:13,926 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 03:24:13,930 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 03:24:13,930 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 03:24:13,931 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:24:13" (1/1) ... [2024-11-14 03:24:13,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:24:13,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:24:13,975 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 03:24:13,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 03:24:14,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 03:24:14,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2024-11-14 03:24:14,016 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-14 03:24:14,017 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-14 03:24:14,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-14 03:24:14,017 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2024-11-14 03:24:14,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 03:24:14,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 03:24:14,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 03:24:14,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2024-11-14 03:24:14,136 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 03:24:14,138 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 03:24:14,500 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2024-11-14 03:24:14,501 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 03:24:14,515 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 03:24:14,515 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-14 03:24:14,516 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:24:14 BoogieIcfgContainer [2024-11-14 03:24:14,516 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 03:24:14,521 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 03:24:14,522 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 03:24:14,529 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 03:24:14,530 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 03:24:13" (1/3) ... [2024-11-14 03:24:14,532 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@324ae5da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:24:14, skipping insertion in model container [2024-11-14 03:24:14,532 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:24:13" (2/3) ... [2024-11-14 03:24:14,532 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@324ae5da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:24:14, skipping insertion in model container [2024-11-14 03:24:14,533 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:24:14" (3/3) ... [2024-11-14 03:24:14,534 INFO L112 eAbstractionObserver]: Analyzing ICFG array4_pattern.c [2024-11-14 03:24:14,553 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 03:24:14,555 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG array4_pattern.c that has 2 procedures, 31 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2024-11-14 03:24:14,632 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 03:24:14,653 INFO L333 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, 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;@4e059917, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 03:24:14,654 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 03:24:14,660 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-14 03:24:14,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-14 03:24:14,671 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:24:14,672 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:24:14,672 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:24:14,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:24:14,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1696638232, now seen corresponding path program 1 times [2024-11-14 03:24:14,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 03:24:14,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1261527194] [2024-11-14 03:24:14,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:24:14,695 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 03:24:14,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 03:24:14,701 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 03:24:14,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-11-14 03:24:14,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:24:14,857 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-14 03:24:14,866 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:24:14,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:24:14,906 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:24:14,906 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 03:24:14,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1261527194] [2024-11-14 03:24:14,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1261527194] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:24:14,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:24:14,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:24:14,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336926567] [2024-11-14 03:24:14,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:24:14,915 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-14 03:24:14,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 03:24:14,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-14 03:24:14,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-14 03:24:14,937 INFO L87 Difference]: Start difference. First operand has 31 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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) [2024-11-14 03:24:14,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:24:14,958 INFO L93 Difference]: Finished difference Result 59 states and 89 transitions. [2024-11-14 03:24:14,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-14 03:24:14,960 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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 16 [2024-11-14 03:24:14,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:24:14,967 INFO L225 Difference]: With dead ends: 59 [2024-11-14 03:24:14,967 INFO L226 Difference]: Without dead ends: 27 [2024-11-14 03:24:14,970 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-14 03:24:14,974 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:24:14,975 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 03:24:14,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-14 03:24:15,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-14 03:24:15,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-14 03:24:15,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2024-11-14 03:24:15,016 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 16 [2024-11-14 03:24:15,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:24:15,016 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2024-11-14 03:24:15,017 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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) [2024-11-14 03:24:15,017 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2024-11-14 03:24:15,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-14 03:24:15,023 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:24:15,023 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:24:15,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2024-11-14 03:24:15,226 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 03:24:15,227 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:24:15,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:24:15,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1354044054, now seen corresponding path program 1 times [2024-11-14 03:24:15,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 03:24:15,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1177166851] [2024-11-14 03:24:15,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:24:15,230 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 03:24:15,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 03:24:15,235 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 03:24:15,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-11-14 03:24:15,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:24:15,414 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:24:15,417 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:24:15,520 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-14 03:24:15,520 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:24:15,520 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 03:24:15,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1177166851] [2024-11-14 03:24:15,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1177166851] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:24:15,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:24:15,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:24:15,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289061776] [2024-11-14 03:24:15,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:24:15,523 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:24:15,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 03:24:15,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:24:15,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:24:15,524 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 03:24:15,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:24:15,661 INFO L93 Difference]: Finished difference Result 58 states and 75 transitions. [2024-11-14 03:24:15,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:24:15,662 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2024-11-14 03:24:15,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:24:15,663 INFO L225 Difference]: With dead ends: 58 [2024-11-14 03:24:15,663 INFO L226 Difference]: Without dead ends: 37 [2024-11-14 03:24:15,664 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:24:15,665 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:24:15,665 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 53 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:24:15,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-14 03:24:15,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2024-11-14 03:24:15,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-14 03:24:15,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2024-11-14 03:24:15,681 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 42 [2024-11-14 03:24:15,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:24:15,682 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2024-11-14 03:24:15,682 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 03:24:15,683 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2024-11-14 03:24:15,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-14 03:24:15,685 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:24:15,685 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:24:15,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2024-11-14 03:24:15,886 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 03:24:15,886 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:24:15,887 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:24:15,887 INFO L85 PathProgramCache]: Analyzing trace with hash 544697428, now seen corresponding path program 1 times [2024-11-14 03:24:15,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 03:24:15,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [623775858] [2024-11-14 03:24:15,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:24:15,887 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 03:24:15,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 03:24:15,890 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 03:24:15,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2024-11-14 03:24:16,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:24:16,043 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 03:24:16,050 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:24:16,207 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-14 03:24:16,207 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:24:16,207 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 03:24:16,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [623775858] [2024-11-14 03:24:16,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [623775858] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:24:16,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:24:16,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 03:24:16,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316990195] [2024-11-14 03:24:16,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:24:16,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:24:16,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 03:24:16,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:24:16,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:24:16,213 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 03:24:16,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:24:16,263 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2024-11-14 03:24:16,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:24:16,266 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2024-11-14 03:24:16,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:24:16,267 INFO L225 Difference]: With dead ends: 41 [2024-11-14 03:24:16,267 INFO L226 Difference]: Without dead ends: 37 [2024-11-14 03:24:16,268 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:24:16,268 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 3 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:24:16,271 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 76 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 03:24:16,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-14 03:24:16,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-11-14 03:24:16,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-14 03:24:16,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2024-11-14 03:24:16,294 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 42 [2024-11-14 03:24:16,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:24:16,294 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2024-11-14 03:24:16,295 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 03:24:16,295 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2024-11-14 03:24:16,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-14 03:24:16,296 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:24:16,296 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:24:16,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2024-11-14 03:24:16,502 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 03:24:16,502 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:24:16,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:24:16,503 INFO L85 PathProgramCache]: Analyzing trace with hash -292583501, now seen corresponding path program 1 times [2024-11-14 03:24:16,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 03:24:16,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [616144952] [2024-11-14 03:24:16,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:24:16,503 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 03:24:16,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 03:24:16,508 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 03:24:16,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2024-11-14 03:24:16,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:24:16,672 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 03:24:16,675 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:24:17,003 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-14 03:24:17,003 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:24:17,004 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 03:24:17,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [616144952] [2024-11-14 03:24:17,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [616144952] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:24:17,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:24:17,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-14 03:24:17,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369490766] [2024-11-14 03:24:17,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:24:17,005 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 03:24:17,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 03:24:17,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 03:24:17,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:24:17,006 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 03:24:17,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:24:17,517 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2024-11-14 03:24:17,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 03:24:17,519 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2024-11-14 03:24:17,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:24:17,520 INFO L225 Difference]: With dead ends: 75 [2024-11-14 03:24:17,523 INFO L226 Difference]: Without dead ends: 43 [2024-11-14 03:24:17,523 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-14 03:24:17,524 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 45 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:24:17,525 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 69 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 03:24:17,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-14 03:24:17,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2024-11-14 03:24:17,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-14 03:24:17,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2024-11-14 03:24:17,551 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 43 [2024-11-14 03:24:17,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:24:17,551 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2024-11-14 03:24:17,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 03:24:17,551 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2024-11-14 03:24:17,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-14 03:24:17,553 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:24:17,553 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:24:17,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2024-11-14 03:24:17,753 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 03:24:17,754 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:24:17,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:24:17,754 INFO L85 PathProgramCache]: Analyzing trace with hash 555022501, now seen corresponding path program 1 times [2024-11-14 03:24:17,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 03:24:17,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [656903626] [2024-11-14 03:24:17,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:24:17,755 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 03:24:17,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 03:24:17,757 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 03:24:17,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2024-11-14 03:24:17,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:24:17,956 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-14 03:24:17,969 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:24:18,246 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 [2024-11-14 03:24:20,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2024-11-14 03:24:26,761 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 03:24:26,764 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 03:24:26,827 INFO L349 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2024-11-14 03:24:26,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 26 [2024-11-14 03:24:26,970 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 03:24:26,971 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:24:27,623 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:24:27,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 95 treesize of output 87 [2024-11-14 03:24:27,911 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:24:27,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 186 treesize of output 184 [2024-11-14 03:24:28,304 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 48 treesize of output 46 [2024-11-14 03:24:28,761 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:24:28,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 106 [2024-11-14 03:24:33,688 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:24:33,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 150 [2024-11-14 03:24:55,650 WARN L286 SmtUtils]: Spent 7.99s on a formula simplification. DAG size of input: 165 DAG size of output: 163 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 03:25:01,946 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 03:25:01,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [656903626] [2024-11-14 03:25:01,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [656903626] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:25:01,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [375448774] [2024-11-14 03:25:01,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:25:01,947 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 03:25:01,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 03:25:01,955 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 03:25:01,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2024-11-14 03:25:02,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:25:02,258 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-14 03:25:02,269 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:25:02,371 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 [2024-11-14 03:25:04,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2024-11-14 03:25:11,100 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 03:25:11,109 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 03:25:11,187 INFO L349 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2024-11-14 03:25:11,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 26 [2024-11-14 03:25:11,225 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 03:25:11,225 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:25:11,523 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:25:11,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 95 treesize of output 87 [2024-11-14 03:25:11,709 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:25:11,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 186 treesize of output 184 [2024-11-14 03:25:11,997 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 48 treesize of output 46 [2024-11-14 03:25:12,371 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:25:12,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 106 [2024-11-14 03:25:17,013 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:25:17,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 137 treesize of output 154 [2024-11-14 03:25:41,826 WARN L286 SmtUtils]: Spent 5.71s on a formula simplification. DAG size of input: 168 DAG size of output: 163 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 03:25:47,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [375448774] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:25:47,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587808807] [2024-11-14 03:25:47,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:25:47,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:25:47,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:25:47,901 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:25:47,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 03:25:47,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:25:48,003 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-14 03:25:48,007 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:25:50,030 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 [2024-11-14 03:25:59,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2024-11-14 03:26:01,038 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 03:26:01,040 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 03:26:01,103 INFO L349 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2024-11-14 03:26:01,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 26 [2024-11-14 03:26:01,133 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 03:26:01,133 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:26:01,399 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:26:01,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 95 treesize of output 87 [2024-11-14 03:26:01,683 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:26:01,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 180 treesize of output 176 [2024-11-14 03:26:01,994 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:26:01,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 137 treesize of output 154 [2024-11-14 03:26:10,016 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 48 treesize of output 46 [2024-11-14 03:26:11,150 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:26:11,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 129 [2024-11-14 03:26:17,831 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse25 (bvmul (_ bv4 32) ((_ sign_extend 16) |c_ULTIMATE.start_main_~index2~0#1|)))) (let ((.cse5 ((_ sign_extend 32) (bvmul |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~count~0#1|))) (.cse1 (= (_ bv0 32) .cse25)) (.cse2 (bvadd ((_ sign_extend 32) (_ bv1 32)) ((_ sign_extend 32) (_ bv4294967295 32)))) (.cse10 ((_ sign_extend 32) (bvmul |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~count~0#1|))) (.cse26 (bvmul ((_ sign_extend 16) |c_ULTIMATE.start_main_~index1~0#1|) (_ bv4 32)))) (let ((.cse12 (= (_ bv0 32) .cse26)) (.cse0 (= |c_ULTIMATE.start_main_~#array2~0#1.base| |c_ULTIMATE.start_main_~#array1~0#1.base|)) (.cse7 (= (bvadd |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse26) |c_ULTIMATE.start_main_~#array2~0#1.offset|)) (.cse8 (= |c_ULTIMATE.start_main_~#array2~0#1.offset| |c_ULTIMATE.start_main_~#array1~0#1.offset|)) (.cse13 (= .cse2 (bvadd (bvmul (_ bv2 64) .cse10) |c_ULTIMATE.start_main_~sum~0#1|))) (.cse11 (not .cse1)) (.cse14 (= (bvadd .cse5 .cse10 |c_ULTIMATE.start_main_~sum~0#1|) .cse2))) (or (and (not .cse0) (or (let ((.cse3 (or .cse1 (forall ((v_arrayElimCell_42 (_ BitVec 32)) (v_arrayElimCell_39 (_ BitVec 32))) (= .cse2 (bvadd ((_ sign_extend 32) v_arrayElimCell_42) ((_ sign_extend 32) v_arrayElimCell_39) |c_ULTIMATE.start_main_~sum~0#1|))))) (.cse6 (or (forall ((v_arrayElimCell_42 (_ BitVec 32))) (= .cse2 (bvadd ((_ sign_extend 32) v_arrayElimCell_42) .cse5 |c_ULTIMATE.start_main_~sum~0#1|))) .cse11))) (and (or (and (or .cse1 (forall ((v_arrayElimCell_42 (_ BitVec 32))) (= (bvadd (bvmul ((_ sign_extend 32) v_arrayElimCell_42) (_ bv2 64)) |c_ULTIMATE.start_main_~sum~0#1|) .cse2))) .cse3 (forall ((v_arrayElimCell_42 (_ BitVec 32))) (let ((.cse4 ((_ sign_extend 32) v_arrayElimCell_42))) (or (= .cse2 (bvadd .cse4 .cse5 |c_ULTIMATE.start_main_~sum~0#1|)) (= (bvadd (bvmul .cse4 (_ bv2 64)) |c_ULTIMATE.start_main_~sum~0#1|) .cse2)))) .cse6) .cse7) (or .cse8 (and .cse3 (forall ((v_arrayElimCell_42 (_ BitVec 32))) (let ((.cse9 ((_ sign_extend 32) v_arrayElimCell_42))) (or (= .cse2 (bvadd .cse9 .cse5 |c_ULTIMATE.start_main_~sum~0#1|)) (= (bvadd .cse9 .cse10 |c_ULTIMATE.start_main_~sum~0#1|) .cse2)))) .cse6 (or .cse1 (forall ((v_arrayElimCell_42 (_ BitVec 32))) (= (bvadd ((_ sign_extend 32) v_arrayElimCell_42) .cse10 |c_ULTIMATE.start_main_~sum~0#1|) .cse2))) (or .cse7 .cse1 (forall ((v_arrayElimCell_42 (_ BitVec 32)) (v_arrayElimCell_40 (_ BitVec 32))) (= (bvadd ((_ sign_extend 32) v_arrayElimCell_42) ((_ sign_extend 32) v_arrayElimCell_40) |c_ULTIMATE.start_main_~sum~0#1|) .cse2))))))) .cse12) (or .cse1 (forall ((v_arrayElimCell_39 (_ BitVec 32))) (= (bvadd ((_ sign_extend 32) v_arrayElimCell_39) .cse10 |c_ULTIMATE.start_main_~sum~0#1|) .cse2))) (or (and .cse13 .cse11) (and .cse14 .cse1)) (or .cse7 .cse1 (forall ((v_arrayElimCell_40 (_ BitVec 32))) (= (bvadd ((_ sign_extend 32) v_arrayElimCell_40) .cse10 |c_ULTIMATE.start_main_~sum~0#1|) .cse2)) .cse8)) (let ((.cse19 (= |c_ULTIMATE.start_main_~#array1~0#1.offset| (bvadd |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse25)))) (let ((.cse18 (not .cse19))) (let ((.cse22 (or .cse18 (forall ((v_arrayElimCell_36 (_ BitVec 32))) (= .cse2 (bvadd .cse5 ((_ sign_extend 32) v_arrayElimCell_36) |c_ULTIMATE.start_main_~sum~0#1|))))) (.cse16 (and .cse14 .cse19)) (.cse23 (and .cse1 (or (and .cse19 (= (bvadd (bvmul (_ bv2 64) .cse5) |c_ULTIMATE.start_main_~sum~0#1|) .cse2)) (and .cse18 .cse14))))) (and (or (let ((.cse15 (forall ((v_arrayElimCell_37 (_ BitVec 32))) (= (bvadd ((_ sign_extend 32) v_arrayElimCell_37) .cse5 |c_ULTIMATE.start_main_~sum~0#1|) .cse2)))) (and (or .cse8 (and (or .cse15 .cse11) (or .cse16 (and (forall ((v_arrayElimCell_37 (_ BitVec 32))) (let ((.cse17 ((_ sign_extend 32) v_arrayElimCell_37))) (or (= .cse2 (bvadd .cse17 .cse10 |c_ULTIMATE.start_main_~sum~0#1|)) (= (bvadd .cse17 .cse5 |c_ULTIMATE.start_main_~sum~0#1|) .cse2)))) (or (and .cse18 (forall ((v_arrayElimCell_37 (_ BitVec 32))) (= .cse2 (bvadd ((_ sign_extend 32) v_arrayElimCell_37) .cse10 |c_ULTIMATE.start_main_~sum~0#1|)))) .cse1))))) (or .cse7 (and (or (and (or .cse19 (forall ((v_arrayElimCell_37 (_ BitVec 32))) (= (bvadd (bvmul ((_ sign_extend 32) v_arrayElimCell_37) (_ bv2 64)) |c_ULTIMATE.start_main_~sum~0#1|) .cse2))) (forall ((v_arrayElimCell_37 (_ BitVec 32))) (let ((.cse20 ((_ sign_extend 32) v_arrayElimCell_37))) (or (= (bvadd (bvmul .cse20 (_ bv2 64)) |c_ULTIMATE.start_main_~sum~0#1|) .cse2) (= (bvadd .cse20 .cse5 |c_ULTIMATE.start_main_~sum~0#1|) .cse2)))) (or .cse18 .cse15)) .cse1) (or (and (forall ((v_arrayElimCell_36 (_ BitVec 32)) (v_arrayElimCell_37 (_ BitVec 32))) (let ((.cse21 ((_ sign_extend 32) v_arrayElimCell_36))) (or (= (bvadd ((_ sign_extend 32) v_arrayElimCell_37) .cse21 |c_ULTIMATE.start_main_~sum~0#1|) .cse2) (= .cse2 (bvadd .cse5 .cse21 |c_ULTIMATE.start_main_~sum~0#1|))))) .cse22 (or .cse19 (forall ((v_arrayElimCell_36 (_ BitVec 32)) (v_arrayElimCell_37 (_ BitVec 32))) (= (bvadd ((_ sign_extend 32) v_arrayElimCell_37) ((_ sign_extend 32) v_arrayElimCell_36) |c_ULTIMATE.start_main_~sum~0#1|) .cse2)))) .cse1 .cse8))) (or .cse23 (and (or .cse13 .cse19) .cse11)))) .cse12) .cse0 (or .cse7 .cse1 (and (forall ((v_arrayElimCell_36 (_ BitVec 32))) (let ((.cse24 ((_ sign_extend 32) v_arrayElimCell_36))) (or (= .cse2 (bvadd .cse5 .cse24 |c_ULTIMATE.start_main_~sum~0#1|)) (= .cse2 (bvadd .cse24 .cse10 |c_ULTIMATE.start_main_~sum~0#1|))))) .cse22 (or .cse19 (forall ((v_arrayElimCell_36 (_ BitVec 32))) (= .cse2 (bvadd ((_ sign_extend 32) v_arrayElimCell_36) .cse10 |c_ULTIMATE.start_main_~sum~0#1|))))) .cse8) (or (and (or .cse16 (and .cse18 .cse13)) .cse11) .cse23))))))))) is different from false [2024-11-14 03:26:40,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587808807] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:26:40,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:26:40,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 18] total 32 [2024-11-14 03:26:40,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880458757] [2024-11-14 03:26:40,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:26:40,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-14 03:26:40,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 03:26:40,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-14 03:26:40,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1186, Unknown=7, NotChecked=72, Total=1482 [2024-11-14 03:26:40,396 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 32 states, 30 states have (on average 1.6) internal successors, (48), 26 states have internal predecessors, (48), 8 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-14 03:27:00,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:27:00,937 INFO L93 Difference]: Finished difference Result 124 states and 161 transitions. [2024-11-14 03:27:00,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-14 03:27:00,938 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 1.6) internal successors, (48), 26 states have internal predecessors, (48), 8 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) Word has length 44 [2024-11-14 03:27:00,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:27:00,940 INFO L225 Difference]: With dead ends: 124 [2024-11-14 03:27:00,940 INFO L226 Difference]: Without dead ends: 97 [2024-11-14 03:27:00,941 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 116 SyntacticMatches, 16 SemanticMatches, 46 ConstructedPredicates, 1 IntricatePredicates, 7 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 79.3s TimeCoverageRelationStatistics Valid=345, Invalid=1814, Unknown=7, NotChecked=90, Total=2256 [2024-11-14 03:27:00,942 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 130 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:27:00,943 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 232 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 14.6s Time] [2024-11-14 03:27:00,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-11-14 03:27:00,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 72. [2024-11-14 03:27:00,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 51 states have internal predecessors, (59), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-14 03:27:00,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 93 transitions. [2024-11-14 03:27:00,966 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 93 transitions. Word has length 44 [2024-11-14 03:27:00,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:27:00,966 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 93 transitions. [2024-11-14 03:27:00,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 1.6) internal successors, (48), 26 states have internal predecessors, (48), 8 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-14 03:27:00,967 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 93 transitions. [2024-11-14 03:27:00,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-14 03:27:00,968 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:27:00,969 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:27:00,989 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 03:27:01,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2024-11-14 03:27:01,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2024-11-14 03:27:01,569 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt [2024-11-14 03:27:01,570 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:27:01,570 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:27:01,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1061004787, now seen corresponding path program 2 times [2024-11-14 03:27:01,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 03:27:01,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1141218721] [2024-11-14 03:27:01,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 03:27:01,571 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 03:27:01,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 03:27:01,575 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 03:27:01,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2024-11-14 03:27:01,688 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 03:27:01,688 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:27:01,695 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-14 03:27:01,697 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:27:02,565 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-14 03:27:02,565 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:27:03,101 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-14 03:27:03,101 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 03:27:03,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1141218721] [2024-11-14 03:27:03,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1141218721] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:27:03,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2070126271] [2024-11-14 03:27:03,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 03:27:03,102 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 03:27:03,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 03:27:03,104 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 03:27:03,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2024-11-14 03:27:03,297 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 03:27:03,297 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:27:03,299 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-14 03:27:03,300 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:27:04,426 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-14 03:27:04,427 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:27:05,005 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-14 03:27:05,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2070126271] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:27:05,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75331551] [2024-11-14 03:27:05,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 03:27:05,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:27:05,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:27:05,007 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:27:05,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 03:27:05,114 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 03:27:05,114 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:27:05,119 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 03:27:05,120 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:27:05,593 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-14 03:27:05,594 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:27:06,201 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-14 03:27:06,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75331551] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:27:06,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 03:27:06,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 9, 8, 7, 7] total 32 [2024-11-14 03:27:06,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792503877] [2024-11-14 03:27:06,201 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 03:27:06,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-14 03:27:06,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 03:27:06,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-14 03:27:06,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=752, Unknown=0, NotChecked=0, Total=992 [2024-11-14 03:27:06,208 INFO L87 Difference]: Start difference. First operand 72 states and 93 transitions. Second operand has 32 states, 32 states have (on average 2.90625) internal successors, (93), 31 states have internal predecessors, (93), 6 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (23), 7 states have call predecessors, (23), 6 states have call successors, (23) [2024-11-14 03:27:11,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:27:11,938 INFO L93 Difference]: Finished difference Result 294 states and 410 transitions. [2024-11-14 03:27:11,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-14 03:27:11,938 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.90625) internal successors, (93), 31 states have internal predecessors, (93), 6 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (23), 7 states have call predecessors, (23), 6 states have call successors, (23) Word has length 45 [2024-11-14 03:27:11,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:27:11,942 INFO L225 Difference]: With dead ends: 294 [2024-11-14 03:27:11,942 INFO L226 Difference]: Without dead ends: 272 [2024-11-14 03:27:11,944 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 232 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=526, Invalid=1826, Unknown=0, NotChecked=0, Total=2352 [2024-11-14 03:27:11,945 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 235 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:27:11,945 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 412 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2024-11-14 03:27:11,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2024-11-14 03:27:11,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 130. [2024-11-14 03:27:11,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 92 states have (on average 1.1630434782608696) internal successors, (107), 92 states have internal predecessors, (107), 33 states have call successors, (33), 4 states have call predecessors, (33), 4 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2024-11-14 03:27:11,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 173 transitions. [2024-11-14 03:27:12,000 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 173 transitions. Word has length 45 [2024-11-14 03:27:12,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:27:12,000 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 173 transitions. [2024-11-14 03:27:12,001 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.90625) internal successors, (93), 31 states have internal predecessors, (93), 6 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (23), 7 states have call predecessors, (23), 6 states have call successors, (23) [2024-11-14 03:27:12,001 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 173 transitions. [2024-11-14 03:27:12,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-14 03:27:12,002 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:27:12,003 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:27:12,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-14 03:27:12,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2024-11-14 03:27:12,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2024-11-14 03:27:12,603 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt [2024-11-14 03:27:12,604 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:27:12,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:27:12,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1466924556, now seen corresponding path program 3 times [2024-11-14 03:27:12,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 03:27:12,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [879981747] [2024-11-14 03:27:12,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:27:12,605 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 03:27:12,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 03:27:12,607 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 03:27:12,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2024-11-14 03:27:12,879 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-14 03:27:12,879 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:27:12,887 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-14 03:27:12,891 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:27:12,961 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 [2024-11-14 03:27:13,108 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 [2024-11-14 03:27:13,236 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 [2024-11-14 03:27:21,071 INFO L349 Elim1Store]: treesize reduction 768, result has 18.0 percent of original size [2024-11-14 03:27:21,072 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 12 new quantified variables, introduced 60 case distinctions, treesize of input 121 treesize of output 227 [2024-11-14 03:27:25,591 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:27:25,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 2 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 18 case distinctions, treesize of input 200 treesize of output 334 [2024-11-14 03:27:32,382 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 22 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 03:27:32,382 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:27:43,488 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 03:27:43,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [879981747] [2024-11-14 03:27:43,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [879981747] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:27:43,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [958529498] [2024-11-14 03:27:43,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:27:43,489 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 03:27:43,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 03:27:43,491 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 03:27:43,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2024-11-14 03:27:44,430 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-14 03:27:44,431 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:27:44,435 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-14 03:27:44,440 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:27:45,292 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 [2024-11-14 03:27:45,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2024-11-14 03:27:46,021 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:27:46,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 46 [2024-11-14 03:27:56,642 INFO L224 Elim1Store]: Index analysis took 134 ms [2024-11-14 03:27:56,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:27:56,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:27:58,610 INFO L349 Elim1Store]: treesize reduction 768, result has 18.0 percent of original size [2024-11-14 03:27:58,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 9 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 72 case distinctions, treesize of input 129 treesize of output 238 [2024-11-14 03:28:05,231 INFO L349 Elim1Store]: treesize reduction 90, result has 70.7 percent of original size [2024-11-14 03:28:05,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 4 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 28 case distinctions, treesize of input 208 treesize of output 338 [2024-11-14 03:28:23,401 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 22 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 03:28:23,401 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:28:26,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [958529498] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:28:26,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719567093] [2024-11-14 03:28:26,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:28:26,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:28:26,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:28:26,051 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:28:26,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe5381-5970-48eb-8355-05b894bd13c3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 03:28:26,215 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-14 03:28:26,215 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:28:26,221 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-14 03:28:26,225 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:28:27,607 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 [2024-11-14 03:28:28,030 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 [2024-11-14 03:28:28,589 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 [2024-11-14 03:28:34,402 INFO L224 Elim1Store]: Index analysis took 101 ms [2024-11-14 03:28:36,444 INFO L349 Elim1Store]: treesize reduction 768, result has 18.0 percent of original size [2024-11-14 03:28:36,445 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 12 new quantified variables, introduced 60 case distinctions, treesize of input 121 treesize of output 227 [2024-11-14 03:28:39,429 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:28:39,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 2 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 18 case distinctions, treesize of input 200 treesize of output 334