./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/revcpyswp2.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_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/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_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-tiling/revcpyswp2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/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_a8827d36-1032-4859-9289-f1fbf80f87c6/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 e5d836305a9654c4a87b407d535438bc329bb78fc0805b3b823600303a7df507 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 04:17:28,546 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 04:17:28,640 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 04:17:28,648 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 04:17:28,649 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 04:17:28,680 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 04:17:28,681 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 04:17:28,681 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 04:17:28,682 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 04:17:28,682 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 04:17:28,682 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 04:17:28,682 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 04:17:28,683 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 04:17:28,683 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 04:17:28,683 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 04:17:28,683 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 04:17:28,683 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 04:17:28,683 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 04:17:28,684 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 04:17:28,684 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 04:17:28,684 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 04:17:28,684 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 04:17:28,685 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 04:17:28,685 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 04:17:28,685 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 04:17:28,685 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 04:17:28,685 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 04:17:28,685 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 04:17:28,685 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 04:17:28,686 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 04:17:28,686 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 04:17:28,686 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 04:17:28,686 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 04:17:28,686 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 04:17:28,686 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 04:17:28,687 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 04:17:28,687 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 04:17:28,687 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 04:17:28,687 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:17:28,687 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 04:17:28,687 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 04:17:28,687 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 04:17:28,688 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 04:17:28,688 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 04:17:28,688 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 04:17:28,688 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 04:17:28,688 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 04:17:28,688 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_a8827d36-1032-4859-9289-f1fbf80f87c6/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 -> e5d836305a9654c4a87b407d535438bc329bb78fc0805b3b823600303a7df507 [2024-11-14 04:17:29,095 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 04:17:29,109 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 04:17:29,112 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 04:17:29,116 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 04:17:29,116 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 04:17:29,119 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/array-tiling/revcpyswp2.c Unable to find full path for "g++" [2024-11-14 04:17:31,281 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 04:17:31,655 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 04:17:31,656 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/sv-benchmarks/c/array-tiling/revcpyswp2.c [2024-11-14 04:17:31,671 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/data/b25419c98/08128d8fca134379b2869dc9a29ffa89/FLAG8766517a5 [2024-11-14 04:17:31,897 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/data/b25419c98/08128d8fca134379b2869dc9a29ffa89 [2024-11-14 04:17:31,900 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 04:17:31,901 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 04:17:31,906 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 04:17:31,906 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 04:17:31,912 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 04:17:31,914 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:17:31" (1/1) ... [2024-11-14 04:17:31,917 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63e9ae17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:17:31, skipping insertion in model container [2024-11-14 04:17:31,917 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:17:31" (1/1) ... [2024-11-14 04:17:31,935 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 04:17:32,129 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_a8827d36-1032-4859-9289-f1fbf80f87c6/sv-benchmarks/c/array-tiling/revcpyswp2.c[432,445] [2024-11-14 04:17:32,163 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:17:32,183 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 04:17:32,196 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_a8827d36-1032-4859-9289-f1fbf80f87c6/sv-benchmarks/c/array-tiling/revcpyswp2.c[432,445] [2024-11-14 04:17:32,208 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:17:32,224 INFO L204 MainTranslator]: Completed translation [2024-11-14 04:17:32,225 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:17:32 WrapperNode [2024-11-14 04:17:32,225 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 04:17:32,226 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 04:17:32,226 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 04:17:32,226 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 04:17:32,233 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:17:32" (1/1) ... [2024-11-14 04:17:32,243 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:17:32" (1/1) ... [2024-11-14 04:17:32,265 INFO L138 Inliner]: procedures = 16, calls = 28, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 106 [2024-11-14 04:17:32,265 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 04:17:32,266 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 04:17:32,266 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 04:17:32,267 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 04:17:32,273 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:17:32" (1/1) ... [2024-11-14 04:17:32,274 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:17:32" (1/1) ... [2024-11-14 04:17:32,276 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:17:32" (1/1) ... [2024-11-14 04:17:32,277 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:17:32" (1/1) ... [2024-11-14 04:17:32,284 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:17:32" (1/1) ... [2024-11-14 04:17:32,289 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:17:32" (1/1) ... [2024-11-14 04:17:32,290 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:17:32" (1/1) ... [2024-11-14 04:17:32,291 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:17:32" (1/1) ... [2024-11-14 04:17:32,293 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 04:17:32,294 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 04:17:32,295 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 04:17:32,295 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 04:17:32,296 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:17:32" (1/1) ... [2024-11-14 04:17:32,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:17:32,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:17:32,334 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 04:17:32,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 04:17:32,368 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 04:17:32,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 04:17:32,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-14 04:17:32,368 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-14 04:17:32,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 04:17:32,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 04:17:32,369 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-14 04:17:32,461 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 04:17:32,463 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 04:17:32,700 INFO L? ?]: Removed 14 outVars from TransFormulas that were not future-live. [2024-11-14 04:17:32,701 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 04:17:32,756 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 04:17:32,756 INFO L316 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-14 04:17:32,757 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:17:32 BoogieIcfgContainer [2024-11-14 04:17:32,757 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 04:17:32,762 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 04:17:32,762 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 04:17:32,770 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 04:17:32,771 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 04:17:31" (1/3) ... [2024-11-14 04:17:32,772 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2534694a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:17:32, skipping insertion in model container [2024-11-14 04:17:32,772 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:17:32" (2/3) ... [2024-11-14 04:17:32,773 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2534694a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:17:32, skipping insertion in model container [2024-11-14 04:17:32,773 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:17:32" (3/3) ... [2024-11-14 04:17:32,774 INFO L112 eAbstractionObserver]: Analyzing ICFG revcpyswp2.c [2024-11-14 04:17:32,794 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 04:17:32,798 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG revcpyswp2.c that has 1 procedures, 13 locations, 1 initial locations, 5 loop locations, and 1 error locations. [2024-11-14 04:17:32,881 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 04:17:32,901 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;@7ae1f854, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 04:17:32,902 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 04:17:32,906 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:32,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-14 04:17:32,914 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:17:32,915 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:17:32,916 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:17:32,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:17:32,922 INFO L85 PathProgramCache]: Analyzing trace with hash -413855279, now seen corresponding path program 1 times [2024-11-14 04:17:32,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:17:32,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513199061] [2024-11-14 04:17:32,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:32,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:17:33,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:33,365 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 04:17:33,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:17:33,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513199061] [2024-11-14 04:17:33,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513199061] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:17:33,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:17:33,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:17:33,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350741686] [2024-11-14 04:17:33,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:17:33,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:17:33,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:17:33,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:17:33,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:17:33,411 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:33,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:17:33,505 INFO L93 Difference]: Finished difference Result 24 states and 35 transitions. [2024-11-14 04:17:33,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:17:33,508 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-14 04:17:33,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:17:33,517 INFO L225 Difference]: With dead ends: 24 [2024-11-14 04:17:33,520 INFO L226 Difference]: Without dead ends: 12 [2024-11-14 04:17:33,524 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 04:17:33,528 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:17:33,528 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:17:33,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2024-11-14 04:17:33,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2024-11-14 04:17:33,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:33,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2024-11-14 04:17:33,557 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2024-11-14 04:17:33,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:17:33,559 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2024-11-14 04:17:33,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:33,560 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2024-11-14 04:17:33,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-14 04:17:33,560 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:17:33,561 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:17:33,561 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 04:17:33,561 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:17:33,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:17:33,562 INFO L85 PathProgramCache]: Analyzing trace with hash 771004232, now seen corresponding path program 1 times [2024-11-14 04:17:33,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:17:33,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9253429] [2024-11-14 04:17:33,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:33,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:17:33,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:33,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:17:33,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:17:33,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9253429] [2024-11-14 04:17:33,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9253429] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:17:33,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:17:33,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 04:17:33,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869611419] [2024-11-14 04:17:33,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:17:33,801 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:17:33,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:17:33,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:17:33,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:17:33,803 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:33,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:17:33,896 INFO L93 Difference]: Finished difference Result 27 states and 36 transitions. [2024-11-14 04:17:33,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:17:33,898 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-14 04:17:33,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:17:33,899 INFO L225 Difference]: With dead ends: 27 [2024-11-14 04:17:33,899 INFO L226 Difference]: Without dead ends: 20 [2024-11-14 04:17:33,900 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:17:33,902 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 23 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:17:33,905 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 7 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:17:33,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-14 04:17:33,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 15. [2024-11-14 04:17:33,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:33,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2024-11-14 04:17:33,915 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 10 [2024-11-14 04:17:33,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:17:33,915 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2024-11-14 04:17:33,915 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:33,916 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2024-11-14 04:17:33,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-14 04:17:33,916 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:17:33,917 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:17:33,918 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 04:17:33,918 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:17:33,918 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:17:33,919 INFO L85 PathProgramCache]: Analyzing trace with hash -105958947, now seen corresponding path program 1 times [2024-11-14 04:17:33,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:17:33,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143902303] [2024-11-14 04:17:33,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:33,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:17:34,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:34,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 04:17:34,146 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:17:34,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143902303] [2024-11-14 04:17:34,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143902303] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:17:34,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577385871] [2024-11-14 04:17:34,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:34,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:17:34,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:17:34,149 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:17:34,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 04:17:34,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:34,335 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 04:17:34,342 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:17:34,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 04:17:34,440 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:17:34,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 04:17:34,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577385871] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:17:34,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [411349189] [2024-11-14 04:17:34,521 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 04:17:34,521 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:17:34,525 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:17:34,531 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:17:34,532 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:17:38,220 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:17:38,813 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '220#(and (not (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) |ULTIMATE.start_main_~a~0#1.offset|) (select (select |#memory_int| |ULTIMATE.start_main_~a_copy~0#1.base|) (+ (* ~SIZE~0 4) |ULTIMATE.start_main_~a_copy~0#1.offset| (- 4))))) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 ~SIZE~0))' at error location [2024-11-14 04:17:38,814 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:17:38,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:17:38,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-14 04:17:38,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557319273] [2024-11-14 04:17:38,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:17:38,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 04:17:38,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:17:38,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 04:17:38,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-11-14 04:17:38,817 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:38,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:17:38,960 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2024-11-14 04:17:38,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:17:38,961 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-14 04:17:38,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:17:38,962 INFO L225 Difference]: With dead ends: 27 [2024-11-14 04:17:38,962 INFO L226 Difference]: Without dead ends: 16 [2024-11-14 04:17:38,963 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-11-14 04:17:38,964 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:17:38,964 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 20 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:17:38,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-11-14 04:17:38,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-11-14 04:17:38,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:38,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2024-11-14 04:17:38,969 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 13 [2024-11-14 04:17:38,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:17:38,970 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2024-11-14 04:17:38,970 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:38,970 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2024-11-14 04:17:38,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-14 04:17:38,971 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:17:38,971 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:17:38,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-14 04:17:39,175 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:17:39,175 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:17:39,176 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:17:39,176 INFO L85 PathProgramCache]: Analyzing trace with hash 831595476, now seen corresponding path program 2 times [2024-11-14 04:17:39,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:17:39,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012564406] [2024-11-14 04:17:39,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:39,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:17:39,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:39,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 04:17:39,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:17:39,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012564406] [2024-11-14 04:17:39,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012564406] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:17:39,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751574647] [2024-11-14 04:17:39,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:17:39,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:17:39,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:17:39,497 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:17:39,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 04:17:39,748 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 04:17:39,748 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:17:39,750 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 04:17:39,752 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:17:39,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 04:17:39,881 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:17:39,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 04:17:39,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751574647] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:17:39,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [973684192] [2024-11-14 04:17:39,974 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 04:17:39,975 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:17:39,975 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:17:39,975 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:17:39,975 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:17:40,622 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:17:41,022 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '383#(and (not (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) |ULTIMATE.start_main_~a~0#1.offset|) (select (select |#memory_int| |ULTIMATE.start_main_~a_copy~0#1.base|) (+ (* ~SIZE~0 4) |ULTIMATE.start_main_~a_copy~0#1.offset| (- 4))))) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 ~SIZE~0))' at error location [2024-11-14 04:17:41,022 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:17:41,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:17:41,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-11-14 04:17:41,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920946049] [2024-11-14 04:17:41,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:17:41,023 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 04:17:41,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:17:41,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 04:17:41,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2024-11-14 04:17:41,024 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:41,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:17:41,194 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2024-11-14 04:17:41,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 04:17:41,194 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-14 04:17:41,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:17:41,195 INFO L225 Difference]: With dead ends: 38 [2024-11-14 04:17:41,195 INFO L226 Difference]: Without dead ends: 29 [2024-11-14 04:17:41,195 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2024-11-14 04:17:41,196 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 38 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:17:41,197 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 13 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:17:41,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-14 04:17:41,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2024-11-14 04:17:41,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:41,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2024-11-14 04:17:41,204 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 14 [2024-11-14 04:17:41,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:17:41,204 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2024-11-14 04:17:41,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:41,205 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2024-11-14 04:17:41,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-14 04:17:41,207 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:17:41,207 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:17:41,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-14 04:17:41,407 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:17:41,408 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:17:41,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:17:41,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1686003665, now seen corresponding path program 3 times [2024-11-14 04:17:41,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:17:41,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385413866] [2024-11-14 04:17:41,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:41,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:17:41,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:44,822 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:17:44,823 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:17:44,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385413866] [2024-11-14 04:17:44,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385413866] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:17:44,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617828200] [2024-11-14 04:17:44,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:17:44,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:17:44,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:17:44,827 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:17:44,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 04:17:44,974 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:17:44,974 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:17:44,977 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-14 04:17:44,981 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:17:45,012 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-14 04:17:45,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 23 treesize of output 19 [2024-11-14 04:17:45,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 28 [2024-11-14 04:17:45,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2024-11-14 04:17:45,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:17:45,460 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-14 04:17:45,460 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 4 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 55 [2024-11-14 04:17:45,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2024-11-14 04:17:45,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 80 [2024-11-14 04:17:45,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:17:45,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 58 [2024-11-14 04:17:46,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:17:46,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 81 [2024-11-14 04:17:46,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 69 [2024-11-14 04:17:46,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:17:46,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:17:46,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 32 [2024-11-14 04:17:46,172 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 19 treesize of output 15 [2024-11-14 04:17:46,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 04:17:46,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 38 [2024-11-14 04:17:46,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2024-11-14 04:17:46,541 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 9 treesize of output 7 [2024-11-14 04:17:46,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:17:46,592 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 49 [2024-11-14 04:17:46,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2024-11-14 04:17:46,617 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 13 treesize of output 9 [2024-11-14 04:17:46,852 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 04:17:46,853 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:17:47,090 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_220 (Array Int Int))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse1 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ .cse1 |c_ULTIMATE.start_main_~b~0#1.offset|))))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_220))) (= (select (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select .cse0 |c_ULTIMATE.start_main_~a_copy~0#1.base|) (+ |c_ULTIMATE.start_main_~a_copy~0#1.offset| (- 4) (* 4 c_~SIZE~0)))))) is different from false [2024-11-14 04:17:47,135 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_218 (Array Int Int)) (|v_ULTIMATE.start_main_~i~0#1_112| Int) (v_ArrVal_220 (Array Int Int))) (or (< |v_ULTIMATE.start_main_~i~0#1_112| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse2 (* |v_ULTIMATE.start_main_~i~0#1_112| 4))) (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse1 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ .cse1 |c_ULTIMATE.start_main_~b~0#1.offset|))))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_218) |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|) (select v_ArrVal_218 (+ .cse2 |c_ULTIMATE.start_main_~b~0#1.offset|))))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_220))) (= (select (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select .cse0 |c_ULTIMATE.start_main_~a_copy~0#1.base|) (+ |c_ULTIMATE.start_main_~a_copy~0#1.offset| (- 4) (* 4 c_~SIZE~0))))))) is different from false [2024-11-14 04:17:47,179 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_218 (Array Int Int)) (|v_ULTIMATE.start_main_~i~0#1_112| Int) (v_ArrVal_220 (Array Int Int))) (or (< |v_ULTIMATE.start_main_~i~0#1_112| 1) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse1 (* |v_ULTIMATE.start_main_~i~0#1_112| 4))) (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| (select (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_218) |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) (select v_ArrVal_218 (+ .cse1 |c_ULTIMATE.start_main_~b~0#1.offset|))))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_220))) (= (select (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select .cse0 |c_ULTIMATE.start_main_~a_copy~0#1.base|) (+ |c_ULTIMATE.start_main_~a_copy~0#1.offset| (- 4) (* 4 c_~SIZE~0))))))) is different from false [2024-11-14 04:17:47,217 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_218 (Array Int Int)) (|v_ULTIMATE.start_main_~i~0#1_112| Int) (v_ArrVal_220 (Array Int Int)) (v_ArrVal_216 Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_112| 1) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse5 (* |v_ULTIMATE.start_main_~i~0#1_112| 4))) (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse4 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse3 (+ .cse4 |c_ULTIMATE.start_main_~b~0#1.offset|))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse4 |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) .cse3))))) (let ((.cse2 (store (select .cse1 |c_ULTIMATE.start_main_~b~0#1.base|) .cse3 v_ArrVal_216))) (store (select (store .cse1 |c_ULTIMATE.start_main_~b~0#1.base| .cse2) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| (select .cse2 |c_ULTIMATE.start_main_~b~0#1.offset|))))))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_218) |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse5 |c_ULTIMATE.start_main_~a~0#1.offset|) (select v_ArrVal_218 (+ .cse5 |c_ULTIMATE.start_main_~b~0#1.offset|))))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_220))) (= (select (select .cse0 |c_ULTIMATE.start_main_~a_copy~0#1.base|) (+ |c_ULTIMATE.start_main_~a_copy~0#1.offset| (- 4) (* 4 c_~SIZE~0))) (select (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))))) is different from false [2024-11-14 04:17:47,341 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_114| Int) (v_ArrVal_218 (Array Int Int)) (|v_ULTIMATE.start_main_~i~0#1_112| Int) (v_ArrVal_220 (Array Int Int)) (v_ArrVal_211 (Array Int Int)) (v_ArrVal_216 Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_112| 1) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse10 (* |v_ULTIMATE.start_main_~i~0#1_112| 4))) (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse5 (* |v_ULTIMATE.start_main_~i~0#1_114| 4))) (let ((.cse3 (let ((.cse9 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse8 (+ .cse9 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse6 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse7 (+ .cse9 |c_ULTIMATE.start_main_~a~0#1.offset|))) (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store .cse6 .cse7 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) .cse8))) |c_ULTIMATE.start_main_~b~0#1.base|) .cse8 (select .cse6 .cse7))))) (.cse4 (+ .cse5 |c_ULTIMATE.start_main_~b~0#1.offset|))) (let ((.cse1 (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_211) |c_ULTIMATE.start_main_~b~0#1.base| .cse3) |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse5 |c_ULTIMATE.start_main_~a~0#1.offset|) (select .cse3 .cse4)))) (let ((.cse2 (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse3) |c_ULTIMATE.start_main_~a~0#1.base| .cse1) |c_ULTIMATE.start_main_~b~0#1.base|) .cse4 v_ArrVal_216))) (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse1) |c_ULTIMATE.start_main_~b~0#1.base| .cse2) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| (select .cse2 |c_ULTIMATE.start_main_~b~0#1.offset|))))))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_218) |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse10 |c_ULTIMATE.start_main_~a~0#1.offset|) (select v_ArrVal_218 (+ .cse10 |c_ULTIMATE.start_main_~b~0#1.offset|))))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_220))) (= (select (select .cse0 |c_ULTIMATE.start_main_~a_copy~0#1.base|) (+ |c_ULTIMATE.start_main_~a_copy~0#1.offset| (- 4) (* 4 c_~SIZE~0))) (select (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (< |v_ULTIMATE.start_main_~i~0#1_114| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2024-11-14 04:17:47,441 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_114| Int) (v_ArrVal_218 (Array Int Int)) (|v_ULTIMATE.start_main_~i~0#1_112| Int) (v_ArrVal_220 (Array Int Int)) (v_ArrVal_211 (Array Int Int)) (v_ArrVal_216 Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_112| 1) (< |v_ULTIMATE.start_main_~i~0#1_114| 1) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse7 (* |v_ULTIMATE.start_main_~i~0#1_112| 4))) (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse5 (* |v_ULTIMATE.start_main_~i~0#1_114| 4))) (let ((.cse3 (let ((.cse6 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store .cse6 |c_ULTIMATE.start_main_~a~0#1.offset| (select (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|))) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| (select .cse6 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (.cse4 (+ .cse5 |c_ULTIMATE.start_main_~b~0#1.offset|))) (let ((.cse1 (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_211) |c_ULTIMATE.start_main_~b~0#1.base| .cse3) |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse5 |c_ULTIMATE.start_main_~a~0#1.offset|) (select .cse3 .cse4)))) (let ((.cse2 (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse3) |c_ULTIMATE.start_main_~a~0#1.base| .cse1) |c_ULTIMATE.start_main_~b~0#1.base|) .cse4 v_ArrVal_216))) (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse1) |c_ULTIMATE.start_main_~b~0#1.base| .cse2) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| (select .cse2 |c_ULTIMATE.start_main_~b~0#1.offset|))))))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_218) |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse7 |c_ULTIMATE.start_main_~a~0#1.offset|) (select v_ArrVal_218 (+ .cse7 |c_ULTIMATE.start_main_~b~0#1.offset|))))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_220))) (= (select (select .cse0 |c_ULTIMATE.start_main_~a_copy~0#1.base|) (+ |c_ULTIMATE.start_main_~a_copy~0#1.offset| (- 4) (* 4 c_~SIZE~0))) (select (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))))) is different from false [2024-11-14 04:17:47,680 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_114| Int) (v_ArrVal_218 (Array Int Int)) (v_ArrVal_209 (Array Int Int)) (|v_ULTIMATE.start_main_~i~0#1_112| Int) (v_ArrVal_220 (Array Int Int)) (v_ArrVal_211 (Array Int Int)) (v_ArrVal_216 Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_112| 1) (< |v_ULTIMATE.start_main_~i~0#1_114| 1) (let ((.cse1 (* 4 c_~SIZE~0))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse8 (* |v_ULTIMATE.start_main_~i~0#1_112| 4))) (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse6 (* |v_ULTIMATE.start_main_~i~0#1_114| 4))) (let ((.cse4 (let ((.cse7 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a_copy~0#1.base|) (+ |c_ULTIMATE.start_main_~a_copy~0#1.offset| (* (- 4) |c_ULTIMATE.start_main_~i~0#1|) (- 4) .cse1)))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_209) |c_ULTIMATE.start_main_~a~0#1.base|))) (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_209) |c_ULTIMATE.start_main_~a~0#1.base| (store .cse7 |c_ULTIMATE.start_main_~a~0#1.offset| (select v_ArrVal_209 |c_ULTIMATE.start_main_~b~0#1.offset|))) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| (select .cse7 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (.cse5 (+ .cse6 |c_ULTIMATE.start_main_~b~0#1.offset|))) (let ((.cse2 (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_211) |c_ULTIMATE.start_main_~b~0#1.base| .cse4) |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse6 |c_ULTIMATE.start_main_~a~0#1.offset|) (select .cse4 .cse5)))) (let ((.cse3 (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse4) |c_ULTIMATE.start_main_~a~0#1.base| .cse2) |c_ULTIMATE.start_main_~b~0#1.base|) .cse5 v_ArrVal_216))) (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse2) |c_ULTIMATE.start_main_~b~0#1.base| .cse3) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| (select .cse3 |c_ULTIMATE.start_main_~b~0#1.offset|))))))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_218) |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse8 |c_ULTIMATE.start_main_~a~0#1.offset|) (select v_ArrVal_218 (+ .cse8 |c_ULTIMATE.start_main_~b~0#1.offset|))))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_220))) (= (select (select .cse0 |c_ULTIMATE.start_main_~a_copy~0#1.base|) (+ |c_ULTIMATE.start_main_~a_copy~0#1.offset| (- 4) .cse1)) (select (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|)))))) is different from false [2024-11-14 04:17:48,207 INFO L349 Elim1Store]: treesize reduction 88, result has 40.9 percent of original size [2024-11-14 04:17:48,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 80814 treesize of output 47484 [2024-11-14 04:17:48,307 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:17:48,307 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 2184 treesize of output 2106 [2024-11-14 04:17:48,341 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 1308 treesize of output 1248 [2024-11-14 04:17:48,368 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 04:17:48,370 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 04:17:48,397 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 1620 treesize of output 1592 [2024-11-14 04:17:48,466 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:17:48,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 417 treesize of output 398 [2024-11-14 04:17:48,576 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:17:48,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 497 treesize of output 473 [2024-11-14 04:17:48,608 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 84 treesize of output 64 [2024-11-14 04:17:49,115 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 04:17:49,156 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:17:49,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 57 [2024-11-14 04:17:49,503 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:17:49,503 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 143 treesize of output 163 [2024-11-14 04:17:50,130 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 9 not checked. [2024-11-14 04:17:50,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617828200] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:17:50,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [721721823] [2024-11-14 04:17:50,135 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 04:17:50,135 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:17:50,135 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:17:50,136 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:17:50,136 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:17:50,654 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:17:51,697 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '615#(and (not (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) |ULTIMATE.start_main_~a~0#1.offset|) (select (select |#memory_int| |ULTIMATE.start_main_~a_copy~0#1.base|) (+ (* ~SIZE~0 4) |ULTIMATE.start_main_~a_copy~0#1.offset| (- 4))))) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 ~SIZE~0))' at error location [2024-11-14 04:17:51,697 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:17:51,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:17:51,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 14] total 38 [2024-11-14 04:17:51,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454290727] [2024-11-14 04:17:51,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:17:51,698 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-14 04:17:51,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:17:51,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-14 04:17:51,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1212, Unknown=8, NotChecked=546, Total=1980 [2024-11-14 04:17:51,701 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 38 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:54,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:17:54,268 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2024-11-14 04:17:54,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-14 04:17:54,269 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-14 04:17:54,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:17:54,269 INFO L225 Difference]: With dead ends: 39 [2024-11-14 04:17:54,270 INFO L226 Difference]: Without dead ends: 37 [2024-11-14 04:17:54,272 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 7 SemanticMatches, 54 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=382, Invalid=1990, Unknown=8, NotChecked=700, Total=3080 [2024-11-14 04:17:54,273 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 71 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 48 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 287 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 04:17:54,273 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 52 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 218 Invalid, 1 Unknown, 287 Unchecked, 0.6s Time] [2024-11-14 04:17:54,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-14 04:17:54,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2024-11-14 04:17:54,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:54,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2024-11-14 04:17:54,285 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 17 [2024-11-14 04:17:54,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:17:54,285 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2024-11-14 04:17:54,285 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:54,286 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2024-11-14 04:17:54,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-14 04:17:54,286 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:17:54,287 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:17:54,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-14 04:17:54,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:17:54,491 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:17:54,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:17:54,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1148416817, now seen corresponding path program 4 times [2024-11-14 04:17:54,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:17:54,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61654530] [2024-11-14 04:17:54,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:54,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:17:54,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:54,883 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 04:17:54,883 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:17:54,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61654530] [2024-11-14 04:17:54,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61654530] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:17:54,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649435353] [2024-11-14 04:17:54,884 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:17:54,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:17:54,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:17:54,887 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:17:54,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 04:17:55,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:55,029 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 04:17:55,031 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:17:55,269 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 04:17:55,270 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:17:55,463 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 04:17:55,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649435353] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:17:55,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [494139674] [2024-11-14 04:17:55,466 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 04:17:55,466 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:17:55,467 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:17:55,467 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:17:55,467 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:17:56,071 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:17:56,449 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '876#(and (not (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) |ULTIMATE.start_main_~a~0#1.offset|) (select (select |#memory_int| |ULTIMATE.start_main_~a_copy~0#1.base|) (+ (* ~SIZE~0 4) |ULTIMATE.start_main_~a_copy~0#1.offset| (- 4))))) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 ~SIZE~0))' at error location [2024-11-14 04:17:56,449 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:17:56,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:17:56,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2024-11-14 04:17:56,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77796848] [2024-11-14 04:17:56,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:17:56,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-14 04:17:56,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:17:56,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-14 04:17:56,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2024-11-14 04:17:56,451 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:56,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:17:56,830 INFO L93 Difference]: Finished difference Result 86 states and 106 transitions. [2024-11-14 04:17:56,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 04:17:56,831 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-14 04:17:56,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:17:56,832 INFO L225 Difference]: With dead ends: 86 [2024-11-14 04:17:56,832 INFO L226 Difference]: Without dead ends: 65 [2024-11-14 04:17:56,833 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2024-11-14 04:17:56,834 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 48 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:17:56,834 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 34 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:17:56,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-14 04:17:56,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 46. [2024-11-14 04:17:56,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.288888888888889) internal successors, (58), 45 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:56,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2024-11-14 04:17:56,851 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 19 [2024-11-14 04:17:56,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:17:56,851 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2024-11-14 04:17:56,851 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:56,851 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2024-11-14 04:17:56,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-14 04:17:56,852 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:17:56,852 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:17:56,869 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 04:17:57,052 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-14 04:17:57,053 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:17:57,053 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:17:57,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1902515474, now seen corresponding path program 1 times [2024-11-14 04:17:57,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:17:57,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175763233] [2024-11-14 04:17:57,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:57,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:17:57,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:18:00,352 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:18:00,352 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:18:00,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175763233] [2024-11-14 04:18:00,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175763233] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:18:00,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973658104] [2024-11-14 04:18:00,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:18:00,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:18:00,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:18:00,355 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:18:00,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 04:18:00,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:18:00,518 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-14 04:18:00,524 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:18:00,569 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-14 04:18:00,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 23 treesize of output 19 [2024-11-14 04:18:01,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 23 [2024-11-14 04:18:01,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2024-11-14 04:18:01,456 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 40 [2024-11-14 04:18:01,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2024-11-14 04:18:01,482 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 9 treesize of output 7 [2024-11-14 04:18:01,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 58 [2024-11-14 04:18:01,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 31 [2024-11-14 04:18:01,642 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 20 treesize of output 16 [2024-11-14 04:18:01,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2024-11-14 04:18:02,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:18:02,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2024-11-14 04:18:02,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 22 treesize of output 15 [2024-11-14 04:18:02,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 33 [2024-11-14 04:18:02,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2024-11-14 04:18:02,206 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 19 treesize of output 15 [2024-11-14 04:18:02,681 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:18:02,681 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:18:03,099 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~tmp~0#1_59| Int) (v_ArrVal_406 (Array Int Int)) (v_ArrVal_408 (Array Int Int))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_406))) (let ((.cse2 (select .cse1 |c_ULTIMATE.start_main_~b~0#1.base|)) (.cse3 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (store (select (store .cse1 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse2 (+ .cse3 |c_ULTIMATE.start_main_~b~0#1.offset|) |v_ULTIMATE.start_main_~tmp~0#1_59|)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse3 |c_ULTIMATE.start_main_~a~0#1.offset| 4) (select .cse2 (+ .cse3 4 |c_ULTIMATE.start_main_~b~0#1.offset|)))))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_408))) (= (select (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (select (select .cse0 |c_ULTIMATE.start_main_~a_copy~0#1.base|) (+ |c_ULTIMATE.start_main_~a_copy~0#1.offset| (* 4 c_~SIZE~0) (- 8)))))) is different from false [2024-11-14 04:18:03,125 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~tmp~0#1_59| Int) (v_ArrVal_406 (Array Int Int)) (v_ArrVal_408 (Array Int Int))) (let ((.cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_406))) (let ((.cse3 (select .cse2 |c_ULTIMATE.start_main_~b~0#1.base|))) (store (select (store .cse2 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse3 |c_ULTIMATE.start_main_~b~0#1.offset| |v_ULTIMATE.start_main_~tmp~0#1_59|)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1 (select .cse3 (+ 4 |c_ULTIMATE.start_main_~b~0#1.offset|)))))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_408))) (= (select (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) .cse1) (select (select .cse0 |c_ULTIMATE.start_main_~a_copy~0#1.base|) (+ |c_ULTIMATE.start_main_~a_copy~0#1.offset| (* 4 c_~SIZE~0) (- 8))))))) is different from false [2024-11-14 04:18:03,146 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~tmp~0#1_59| Int) (v_ArrVal_406 (Array Int Int)) (v_ArrVal_408 (Array Int Int))) (let ((.cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse2 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| (let ((.cse6 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse5 (+ .cse6 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse3 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse4 (+ .cse6 |c_ULTIMATE.start_main_~a~0#1.offset|))) (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store .cse3 .cse4 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) .cse5))) |c_ULTIMATE.start_main_~b~0#1.base|) .cse5 (select .cse3 .cse4))))) |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_406) |c_ULTIMATE.start_main_~b~0#1.base|))) (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_406) |c_ULTIMATE.start_main_~b~0#1.base| (store .cse2 |c_ULTIMATE.start_main_~b~0#1.offset| |v_ULTIMATE.start_main_~tmp~0#1_59|)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1 (select .cse2 (+ 4 |c_ULTIMATE.start_main_~b~0#1.offset|))))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_408))) (= (select (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) .cse1) (select (select .cse0 |c_ULTIMATE.start_main_~a_copy~0#1.base|) (+ |c_ULTIMATE.start_main_~a_copy~0#1.offset| (* 4 c_~SIZE~0) (- 8))))))) is different from false [2024-11-14 04:18:03,170 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_402 (Array Int Int)) (|v_ULTIMATE.start_main_~tmp~0#1_59| Int) (v_ArrVal_406 (Array Int Int)) (v_ArrVal_408 (Array Int Int))) (let ((.cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse2 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| (let ((.cse6 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse5 (+ .cse6 4 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse3 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse6 |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ .cse6 |c_ULTIMATE.start_main_~b~0#1.offset|)))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_402) |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse4 (+ .cse6 |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_402) |c_ULTIMATE.start_main_~a~0#1.base| (store .cse3 .cse4 (select v_ArrVal_402 .cse5))) |c_ULTIMATE.start_main_~b~0#1.base|) .cse5 (select .cse3 .cse4))))) |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_406) |c_ULTIMATE.start_main_~b~0#1.base|))) (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_406) |c_ULTIMATE.start_main_~b~0#1.base| (store .cse2 |c_ULTIMATE.start_main_~b~0#1.offset| |v_ULTIMATE.start_main_~tmp~0#1_59|)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1 (select .cse2 (+ 4 |c_ULTIMATE.start_main_~b~0#1.offset|))))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_408))) (= (select (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) .cse1) (select (select .cse0 |c_ULTIMATE.start_main_~a_copy~0#1.base|) (+ |c_ULTIMATE.start_main_~a_copy~0#1.offset| (* 4 c_~SIZE~0) (- 8))))))) is different from false [2024-11-14 04:18:03,572 INFO L349 Elim1Store]: treesize reduction 88, result has 40.9 percent of original size [2024-11-14 04:18:03,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 2906 treesize of output 2030 [2024-11-14 04:18:03,629 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:18:03,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 334 treesize of output 312 [2024-11-14 04:18:03,680 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:18:03,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 271 treesize of output 229 [2024-11-14 04:18:03,924 INFO L349 Elim1Store]: treesize reduction 37, result has 60.6 percent of original size [2024-11-14 04:18:03,924 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 326 treesize of output 329 [2024-11-14 04:18:04,991 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2024-11-14 04:18:04,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973658104] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:18:04,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1000176031] [2024-11-14 04:18:04,994 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 04:18:04,994 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:18:04,994 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:18:04,994 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:18:04,994 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:18:05,536 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:18:06,519 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1265#(and (or (< 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0)) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~a_copy~0#1.base|) (+ (* ~SIZE~0 4) |ULTIMATE.start_main_~a_copy~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (- 4)) (- 4))) (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))))) (<= (+ |ULTIMATE.start_main_~i~0#1| 1) ~SIZE~0))' at error location [2024-11-14 04:18:06,519 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:18:06,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:18:06,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 46 [2024-11-14 04:18:06,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494721032] [2024-11-14 04:18:06,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:18:06,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-14 04:18:06,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:18:06,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-14 04:18:06,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=2037, Unknown=26, NotChecked=396, Total=2862 [2024-11-14 04:18:06,523 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand has 46 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 46 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:18:10,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:18:10,434 INFO L93 Difference]: Finished difference Result 126 states and 153 transitions. [2024-11-14 04:18:10,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-14 04:18:10,434 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 46 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-11-14 04:18:10,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:18:10,435 INFO L225 Difference]: With dead ends: 126 [2024-11-14 04:18:10,435 INFO L226 Difference]: Without dead ends: 99 [2024-11-14 04:18:10,438 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1370 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=545, Invalid=2978, Unknown=33, NotChecked=476, Total=4032 [2024-11-14 04:18:10,439 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 61 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 88 mSolverCounterUnsat, 22 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 22 IncrementalHoareTripleChecker+Unknown, 364 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-14 04:18:10,439 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 116 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 396 Invalid, 22 Unknown, 364 Unchecked, 1.9s Time] [2024-11-14 04:18:10,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-14 04:18:10,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 49. [2024-11-14 04:18:10,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.3125) internal successors, (63), 48 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:18:10,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 63 transitions. [2024-11-14 04:18:10,460 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 63 transitions. Word has length 20 [2024-11-14 04:18:10,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:18:10,460 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 63 transitions. [2024-11-14 04:18:10,460 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 46 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:18:10,460 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 63 transitions. [2024-11-14 04:18:10,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-14 04:18:10,461 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:18:10,461 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:18:10,481 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 04:18:10,662 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-14 04:18:10,662 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:18:10,662 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:18:10,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1421413817, now seen corresponding path program 5 times [2024-11-14 04:18:10,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:18:10,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403245756] [2024-11-14 04:18:10,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:18:10,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:18:10,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:18:10,938 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-14 04:18:10,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:18:10,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403245756] [2024-11-14 04:18:10,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403245756] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:18:10,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661188336] [2024-11-14 04:18:10,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:18:10,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:18:10,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:18:10,941 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:18:10,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 04:18:11,233 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 04:18:11,233 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:18:11,236 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 04:18:11,237 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:18:11,484 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-14 04:18:11,484 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:18:11,720 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-14 04:18:11,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661188336] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:18:11,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [137088281] [2024-11-14 04:18:11,722 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 04:18:11,722 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:18:11,723 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:18:11,723 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:18:11,724 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:18:12,132 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:18:12,761 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1731#(and (not (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) |ULTIMATE.start_main_~a~0#1.offset|) (select (select |#memory_int| |ULTIMATE.start_main_~a_copy~0#1.base|) (+ (* ~SIZE~0 4) |ULTIMATE.start_main_~a_copy~0#1.offset| (- 4))))) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 ~SIZE~0))' at error location [2024-11-14 04:18:12,761 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:18:12,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:18:12,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-14 04:18:12,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002473394] [2024-11-14 04:18:12,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:18:12,762 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-14 04:18:12,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:18:12,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-14 04:18:12,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2024-11-14 04:18:12,763 INFO L87 Difference]: Start difference. First operand 49 states and 63 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:18:13,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:18:13,287 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2024-11-14 04:18:13,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 04:18:13,288 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-14 04:18:13,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:18:13,289 INFO L225 Difference]: With dead ends: 66 [2024-11-14 04:18:13,289 INFO L226 Difference]: Without dead ends: 51 [2024-11-14 04:18:13,290 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 36 SyntacticMatches, 18 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2024-11-14 04:18:13,290 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 68 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:18:13,291 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 37 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:18:13,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-14 04:18:13,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2024-11-14 04:18:13,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:18:13,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2024-11-14 04:18:13,304 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 21 [2024-11-14 04:18:13,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:18:13,304 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2024-11-14 04:18:13,304 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:18:13,304 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2024-11-14 04:18:13,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-14 04:18:13,305 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:18:13,305 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:18:13,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-14 04:18:13,505 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:18:13,505 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:18:13,506 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:18:13,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1079833256, now seen corresponding path program 6 times [2024-11-14 04:18:13,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:18:13,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842606360] [2024-11-14 04:18:13,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:18:13,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:18:13,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:18:13,854 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 04:18:13,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:18:13,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842606360] [2024-11-14 04:18:13,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842606360] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:18:13,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792379180] [2024-11-14 04:18:13,855 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:18:13,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:18:13,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:18:13,858 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:18:13,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 04:18:13,994 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:18:13,994 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:18:13,996 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-14 04:18:13,997 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:18:14,275 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 04:18:14,275 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:18:14,481 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 04:18:14,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792379180] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:18:14,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1783538931] [2024-11-14 04:18:14,484 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 04:18:14,484 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:18:14,484 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:18:14,485 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:18:14,485 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:18:19,194 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:18:19,674 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2050#(and (not (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) |ULTIMATE.start_main_~a~0#1.offset|) (select (select |#memory_int| |ULTIMATE.start_main_~a_copy~0#1.base|) (+ (* ~SIZE~0 4) |ULTIMATE.start_main_~a_copy~0#1.offset| (- 4))))) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 ~SIZE~0))' at error location [2024-11-14 04:18:19,675 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:18:19,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:18:19,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 17 [2024-11-14 04:18:19,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146847300] [2024-11-14 04:18:19,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:18:19,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-14 04:18:19,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:18:19,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-14 04:18:19,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2024-11-14 04:18:19,676 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:18:20,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:18:20,232 INFO L93 Difference]: Finished difference Result 98 states and 114 transitions. [2024-11-14 04:18:20,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 04:18:20,233 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-14 04:18:20,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:18:20,234 INFO L225 Difference]: With dead ends: 98 [2024-11-14 04:18:20,234 INFO L226 Difference]: Without dead ends: 75 [2024-11-14 04:18:20,234 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2024-11-14 04:18:20,235 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 88 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:18:20,235 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 58 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 04:18:20,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-14 04:18:20,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 49. [2024-11-14 04:18:20,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 48 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:18:20,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2024-11-14 04:18:20,256 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 22 [2024-11-14 04:18:20,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:18:20,256 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2024-11-14 04:18:20,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:18:20,256 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2024-11-14 04:18:20,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-14 04:18:20,257 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:18:20,257 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:18:20,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-14 04:18:20,457 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:18:20,458 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:18:20,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:18:20,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1680922256, now seen corresponding path program 7 times [2024-11-14 04:18:20,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:18:20,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32329728] [2024-11-14 04:18:20,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:18:20,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:18:20,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:18:20,918 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 04:18:20,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:18:20,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32329728] [2024-11-14 04:18:20,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32329728] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:18:20,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735155094] [2024-11-14 04:18:20,919 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:18:20,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:18:20,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:18:20,921 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:18:20,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 04:18:21,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:18:21,078 INFO L255 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-14 04:18:21,080 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:18:21,402 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 04:18:21,402 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:18:21,758 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 04:18:21,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735155094] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:18:21,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1538215631] [2024-11-14 04:18:21,761 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 04:18:21,761 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:18:21,761 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:18:21,761 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:18:21,761 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:18:25,500 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:18:26,173 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2458#(and (not (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) |ULTIMATE.start_main_~a~0#1.offset|) (select (select |#memory_int| |ULTIMATE.start_main_~a_copy~0#1.base|) (+ (* ~SIZE~0 4) |ULTIMATE.start_main_~a_copy~0#1.offset| (- 4))))) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 ~SIZE~0))' at error location [2024-11-14 04:18:26,173 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:18:26,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:18:26,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-11-14 04:18:26,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563312765] [2024-11-14 04:18:26,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:18:26,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-14 04:18:26,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:18:26,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-14 04:18:26,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2024-11-14 04:18:26,175 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:18:27,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:18:27,189 INFO L93 Difference]: Finished difference Result 91 states and 99 transitions. [2024-11-14 04:18:27,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-14 04:18:27,189 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-14 04:18:27,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:18:27,190 INFO L225 Difference]: With dead ends: 91 [2024-11-14 04:18:27,190 INFO L226 Difference]: Without dead ends: 71 [2024-11-14 04:18:27,191 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 40 SyntacticMatches, 22 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=173, Invalid=697, Unknown=0, NotChecked=0, Total=870 [2024-11-14 04:18:27,192 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 100 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 04:18:27,192 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 88 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 04:18:27,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-14 04:18:27,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 47. [2024-11-14 04:18:27,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:18:27,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2024-11-14 04:18:27,209 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 24 [2024-11-14 04:18:27,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:18:27,209 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2024-11-14 04:18:27,210 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:18:27,210 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2024-11-14 04:18:27,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-14 04:18:27,210 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:18:27,210 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:18:27,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-14 04:18:27,414 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:18:27,414 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:18:27,415 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:18:27,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1579693666, now seen corresponding path program 2 times [2024-11-14 04:18:27,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:18:27,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109121908] [2024-11-14 04:18:27,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:18:27,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:18:27,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:18:31,679 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:18:31,679 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:18:31,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109121908] [2024-11-14 04:18:31,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109121908] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:18:31,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553772941] [2024-11-14 04:18:31,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:18:31,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:18:31,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:18:31,682 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:18:31,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 04:18:32,006 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 04:18:32,006 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:18:32,009 INFO L255 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-14 04:18:32,016 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:18:32,039 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-14 04:18:32,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 23 treesize of output 19 [2024-11-14 04:18:32,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 28 [2024-11-14 04:18:32,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2024-11-14 04:18:32,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:18:32,835 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-14 04:18:32,835 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 4 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 55 [2024-11-14 04:18:32,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2024-11-14 04:18:33,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:18:33,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:18:33,300 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-14 04:18:33,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 72 [2024-11-14 04:18:33,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 47 [2024-11-14 04:18:33,344 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 9 treesize of output 7 [2024-11-14 04:18:33,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 80 [2024-11-14 04:18:33,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 53 [2024-11-14 04:18:33,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:18:33,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2024-11-14 04:18:33,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 16 [2024-11-14 04:18:33,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:18:33,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2024-11-14 04:18:33,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:18:33,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 31 treesize of output 20 [2024-11-14 04:18:34,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:18:34,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2024-11-14 04:18:34,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 27 treesize of output 20 [2024-11-14 04:18:34,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 38 [2024-11-14 04:18:34,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2024-11-14 04:18:34,574 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 9 treesize of output 7 [2024-11-14 04:18:34,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:18:34,635 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 49 [2024-11-14 04:18:34,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2024-11-14 04:18:34,665 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 13 treesize of output 9 [2024-11-14 04:18:35,379 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 04:18:35,379 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:18:35,838 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_907 (Array Int Int))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse1 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ .cse1 |c_ULTIMATE.start_main_~b~0#1.offset|))))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_907))) (= (select (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (select (select .cse0 |c_ULTIMATE.start_main_~a_copy~0#1.base|) (+ |c_ULTIMATE.start_main_~a_copy~0#1.offset| (* 4 c_~SIZE~0) (- 8)))))) is different from false [2024-11-14 04:18:35,872 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_343| Int) (v_ArrVal_906 (Array Int Int)) (v_ArrVal_907 (Array Int Int))) (or (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse2 (* |v_ULTIMATE.start_main_~i~0#1_343| 4))) (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse1 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ .cse1 |c_ULTIMATE.start_main_~b~0#1.offset|))))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_906) |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|) (select v_ArrVal_906 (+ .cse2 |c_ULTIMATE.start_main_~b~0#1.offset|))))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_907))) (= (select (select .cse0 |c_ULTIMATE.start_main_~a_copy~0#1.base|) (+ |c_ULTIMATE.start_main_~a_copy~0#1.offset| (* 4 c_~SIZE~0) (- 8))) (select (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)))) (< |v_ULTIMATE.start_main_~i~0#1_343| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2024-11-14 04:18:35,921 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_904 (Array Int Int)) (|v_ULTIMATE.start_main_~i~0#1_343| Int) (|v_ULTIMATE.start_main_~tmp~0#1_116| Int) (v_ArrVal_906 (Array Int Int)) (v_ArrVal_907 (Array Int Int))) (or (< |v_ULTIMATE.start_main_~i~0#1_343| (+ 2 |c_ULTIMATE.start_main_~i~0#1|)) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse4 (* |v_ULTIMATE.start_main_~i~0#1_343| 4))) (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_904))) (let ((.cse2 (select .cse1 |c_ULTIMATE.start_main_~b~0#1.base|)) (.cse3 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (store (select (store .cse1 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse2 (+ .cse3 |c_ULTIMATE.start_main_~b~0#1.offset|) |v_ULTIMATE.start_main_~tmp~0#1_116|)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse3 |c_ULTIMATE.start_main_~a~0#1.offset| 4) (select .cse2 (+ .cse3 4 |c_ULTIMATE.start_main_~b~0#1.offset|)))))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_906) |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse4 |c_ULTIMATE.start_main_~a~0#1.offset|) (select v_ArrVal_906 (+ .cse4 |c_ULTIMATE.start_main_~b~0#1.offset|))))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_907))) (= (select (select .cse0 |c_ULTIMATE.start_main_~a_copy~0#1.base|) (+ |c_ULTIMATE.start_main_~a_copy~0#1.offset| (* 4 c_~SIZE~0) (- 8))) (select (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)))))) is different from false [2024-11-14 04:18:35,970 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_904 (Array Int Int)) (|v_ULTIMATE.start_main_~i~0#1_343| Int) (|v_ULTIMATE.start_main_~tmp~0#1_116| Int) (v_ArrVal_906 (Array Int Int)) (v_ArrVal_907 (Array Int Int))) (or (< |v_ULTIMATE.start_main_~i~0#1_343| 2) (let ((.cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse4 (* |v_ULTIMATE.start_main_~i~0#1_343| 4))) (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_904))) (let ((.cse3 (select .cse2 |c_ULTIMATE.start_main_~b~0#1.base|))) (store (select (store .cse2 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse3 |c_ULTIMATE.start_main_~b~0#1.offset| |v_ULTIMATE.start_main_~tmp~0#1_116|)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1 (select .cse3 (+ 4 |c_ULTIMATE.start_main_~b~0#1.offset|)))))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_906) |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse4 |c_ULTIMATE.start_main_~a~0#1.offset|) (select v_ArrVal_906 (+ .cse4 |c_ULTIMATE.start_main_~b~0#1.offset|))))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_907))) (= (select (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) .cse1) (select (select .cse0 |c_ULTIMATE.start_main_~a_copy~0#1.base|) (+ |c_ULTIMATE.start_main_~a_copy~0#1.offset| (* 4 c_~SIZE~0) (- 8)))))))) is different from false [2024-11-14 04:18:36,017 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_902 (Array Int Int)) (v_ArrVal_904 (Array Int Int)) (|v_ULTIMATE.start_main_~i~0#1_343| Int) (|v_ULTIMATE.start_main_~tmp~0#1_116| Int) (v_ArrVal_906 (Array Int Int)) (v_ArrVal_907 (Array Int Int)) (v_ArrVal_900 Int)) (or (let ((.cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse3 (* |v_ULTIMATE.start_main_~i~0#1_343| 4))) (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse2 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_902) |c_ULTIMATE.start_main_~b~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_900)) |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_904) |c_ULTIMATE.start_main_~b~0#1.base|))) (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_904) |c_ULTIMATE.start_main_~b~0#1.base| (store .cse2 |c_ULTIMATE.start_main_~b~0#1.offset| |v_ULTIMATE.start_main_~tmp~0#1_116|)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1 (select .cse2 (+ 4 |c_ULTIMATE.start_main_~b~0#1.offset|))))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_906) |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse3 |c_ULTIMATE.start_main_~a~0#1.offset|) (select v_ArrVal_906 (+ .cse3 |c_ULTIMATE.start_main_~b~0#1.offset|))))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_907))) (= (select (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) .cse1) (select (select .cse0 |c_ULTIMATE.start_main_~a_copy~0#1.base|) (+ |c_ULTIMATE.start_main_~a_copy~0#1.offset| (* 4 c_~SIZE~0) (- 8)))))) (< |v_ULTIMATE.start_main_~i~0#1_343| 2))) is different from false [2024-11-14 04:18:36,113 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_346| Int) (v_ArrVal_902 (Array Int Int)) (v_ArrVal_904 (Array Int Int)) (|v_ULTIMATE.start_main_~i~0#1_343| Int) (|v_ULTIMATE.start_main_~tmp~0#1_116| Int) (v_ArrVal_906 (Array Int Int)) (v_ArrVal_907 (Array Int Int)) (v_ArrVal_900 Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_343| 2) (let ((.cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse7 (* |v_ULTIMATE.start_main_~i~0#1_343| 4))) (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse2 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| (let ((.cse6 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse5 (+ .cse6 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse3 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse4 (+ .cse6 |c_ULTIMATE.start_main_~a~0#1.offset|))) (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store .cse3 .cse4 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) .cse5))) |c_ULTIMATE.start_main_~b~0#1.base|) .cse5 (select .cse3 .cse4))))) |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_902) |c_ULTIMATE.start_main_~b~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_346| 4) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_900)) |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_904) |c_ULTIMATE.start_main_~b~0#1.base|))) (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_904) |c_ULTIMATE.start_main_~b~0#1.base| (store .cse2 |c_ULTIMATE.start_main_~b~0#1.offset| |v_ULTIMATE.start_main_~tmp~0#1_116|)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1 (select .cse2 (+ 4 |c_ULTIMATE.start_main_~b~0#1.offset|))))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_906) |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse7 |c_ULTIMATE.start_main_~a~0#1.offset|) (select v_ArrVal_906 (+ .cse7 |c_ULTIMATE.start_main_~b~0#1.offset|))))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_907))) (= (select (select .cse0 |c_ULTIMATE.start_main_~a_copy~0#1.base|) (+ |c_ULTIMATE.start_main_~a_copy~0#1.offset| (* 4 c_~SIZE~0) (- 8))) (select (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) .cse1)))) (< |v_ULTIMATE.start_main_~i~0#1_346| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2024-11-14 04:18:36,235 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_346| Int) (v_ArrVal_902 (Array Int Int)) (v_ArrVal_904 (Array Int Int)) (|v_ULTIMATE.start_main_~i~0#1_343| Int) (|v_ULTIMATE.start_main_~tmp~0#1_116| Int) (v_ArrVal_906 (Array Int Int)) (v_ArrVal_907 (Array Int Int)) (v_ArrVal_900 Int) (v_ArrVal_895 (Array Int Int))) (or (let ((.cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse7 (* |v_ULTIMATE.start_main_~i~0#1_343| 4))) (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse2 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| (let ((.cse6 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse5 (+ .cse6 4 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse3 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse6 |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ .cse6 |c_ULTIMATE.start_main_~b~0#1.offset|)))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_895) |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse4 (+ .cse6 |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_895) |c_ULTIMATE.start_main_~a~0#1.base| (store .cse3 .cse4 (select v_ArrVal_895 .cse5))) |c_ULTIMATE.start_main_~b~0#1.base|) .cse5 (select .cse3 .cse4))))) |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_902) |c_ULTIMATE.start_main_~b~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_346| 4) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_900)) |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_904) |c_ULTIMATE.start_main_~b~0#1.base|))) (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_904) |c_ULTIMATE.start_main_~b~0#1.base| (store .cse2 |c_ULTIMATE.start_main_~b~0#1.offset| |v_ULTIMATE.start_main_~tmp~0#1_116|)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1 (select .cse2 (+ 4 |c_ULTIMATE.start_main_~b~0#1.offset|))))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_906) |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse7 |c_ULTIMATE.start_main_~a~0#1.offset|) (select v_ArrVal_906 (+ .cse7 |c_ULTIMATE.start_main_~b~0#1.offset|))))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_907))) (= (select (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) .cse1) (select (select .cse0 |c_ULTIMATE.start_main_~a_copy~0#1.base|) (+ |c_ULTIMATE.start_main_~a_copy~0#1.offset| (* 4 c_~SIZE~0) (- 8)))))) (< |v_ULTIMATE.start_main_~i~0#1_343| 2) (< |v_ULTIMATE.start_main_~i~0#1_346| (+ 2 |c_ULTIMATE.start_main_~i~0#1|)))) is different from false [2024-11-14 04:18:36,295 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_346| Int) (v_ArrVal_902 (Array Int Int)) (|v_ULTIMATE.start_main_~i~0#1_343| Int) (v_ArrVal_904 (Array Int Int)) (|v_ULTIMATE.start_main_~tmp~0#1_116| Int) (v_ArrVal_906 (Array Int Int)) (v_ArrVal_907 (Array Int Int)) (v_ArrVal_900 Int) (v_ArrVal_895 (Array Int Int))) (or (< |v_ULTIMATE.start_main_~i~0#1_343| 2) (< |v_ULTIMATE.start_main_~i~0#1_346| 2) (let ((.cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse5 (* |v_ULTIMATE.start_main_~i~0#1_343| 4))) (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse3 (+ 4 |c_ULTIMATE.start_main_~b~0#1.offset|))) (let ((.cse2 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| (let ((.cse4 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| (select (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_895) |c_ULTIMATE.start_main_~a~0#1.base|))) (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_895) |c_ULTIMATE.start_main_~a~0#1.base| (store .cse4 .cse1 (select v_ArrVal_895 .cse3))) |c_ULTIMATE.start_main_~b~0#1.base|) .cse3 (select .cse4 .cse1)))) |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_902) |c_ULTIMATE.start_main_~b~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_346| 4) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_900)) |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_904) |c_ULTIMATE.start_main_~b~0#1.base|))) (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_904) |c_ULTIMATE.start_main_~b~0#1.base| (store .cse2 |c_ULTIMATE.start_main_~b~0#1.offset| |v_ULTIMATE.start_main_~tmp~0#1_116|)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1 (select .cse2 .cse3))))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_906) |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse5 |c_ULTIMATE.start_main_~a~0#1.offset|) (select v_ArrVal_906 (+ .cse5 |c_ULTIMATE.start_main_~b~0#1.offset|))))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_907))) (= (select (select .cse0 |c_ULTIMATE.start_main_~a_copy~0#1.base|) (+ |c_ULTIMATE.start_main_~a_copy~0#1.offset| (* 4 c_~SIZE~0) (- 8))) (select (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) .cse1)))))) is different from false [2024-11-14 04:18:36,485 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_346| Int) (v_ArrVal_902 (Array Int Int)) (v_ArrVal_904 (Array Int Int)) (|v_ULTIMATE.start_main_~i~0#1_343| Int) (|v_ULTIMATE.start_main_~tmp~0#1_116| Int) (v_ArrVal_906 (Array Int Int)) (v_ArrVal_907 (Array Int Int)) (v_ArrVal_900 Int) (v_ArrVal_893 (Array Int Int)) (v_ArrVal_895 (Array Int Int))) (or (< |v_ULTIMATE.start_main_~i~0#1_343| 2) (let ((.cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse1 (* 4 c_~SIZE~0))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse6 (* |v_ULTIMATE.start_main_~i~0#1_343| 4))) (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse4 (+ 4 |c_ULTIMATE.start_main_~b~0#1.offset|))) (let ((.cse3 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| (let ((.cse5 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a_copy~0#1.base|) (+ |c_ULTIMATE.start_main_~a_copy~0#1.offset| (* (- 4) |c_ULTIMATE.start_main_~i~0#1|) (- 4) .cse1)))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_893) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| (select v_ArrVal_893 |c_ULTIMATE.start_main_~b~0#1.offset|))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_895) |c_ULTIMATE.start_main_~a~0#1.base|))) (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_895) |c_ULTIMATE.start_main_~a~0#1.base| (store .cse5 .cse2 (select v_ArrVal_895 .cse4))) |c_ULTIMATE.start_main_~b~0#1.base|) .cse4 (select .cse5 .cse2)))) |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_902) |c_ULTIMATE.start_main_~b~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_346| 4) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_900)) |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_904) |c_ULTIMATE.start_main_~b~0#1.base|))) (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_904) |c_ULTIMATE.start_main_~b~0#1.base| (store .cse3 |c_ULTIMATE.start_main_~b~0#1.offset| |v_ULTIMATE.start_main_~tmp~0#1_116|)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse2 (select .cse3 .cse4))))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_906) |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse6 |c_ULTIMATE.start_main_~a~0#1.offset|) (select v_ArrVal_906 (+ .cse6 |c_ULTIMATE.start_main_~b~0#1.offset|))))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_907))) (= (select (select .cse0 |c_ULTIMATE.start_main_~a_copy~0#1.base|) (+ |c_ULTIMATE.start_main_~a_copy~0#1.offset| .cse1 (- 8))) (select (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) .cse2)))) (< |v_ULTIMATE.start_main_~i~0#1_346| 2))) is different from false [2024-11-14 04:18:36,787 INFO L349 Elim1Store]: treesize reduction 88, result has 40.9 percent of original size [2024-11-14 04:18:36,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 10880 treesize of output 8186 [2024-11-14 04:18:36,873 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:18:36,874 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 1548 treesize of output 1510 [2024-11-14 04:18:36,894 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 359 treesize of output 339 [2024-11-14 04:18:36,912 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 04:18:36,933 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 04:18:36,955 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 453 treesize of output 439 [2024-11-14 04:18:37,040 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:18:37,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 370 treesize of output 362 [2024-11-14 04:18:37,103 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:18:37,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 345 treesize of output 311 [2024-11-14 04:18:37,845 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:18:37,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 100 treesize of output 94 [2024-11-14 04:18:38,330 INFO L349 Elim1Store]: treesize reduction 8, result has 94.1 percent of original size [2024-11-14 04:18:38,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 189 treesize of output 253 [2024-11-14 04:18:39,876 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 17 not checked. [2024-11-14 04:18:39,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553772941] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:18:39,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [450335699] [2024-11-14 04:18:39,878 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 04:18:39,878 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:18:39,878 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:18:39,878 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:18:39,878 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:18:44,682 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:18:46,139 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2897#(and (not (= (select (select |#memory_int| |ULTIMATE.start_main_~a_copy~0#1.base|) (+ (* ~SIZE~0 4) |ULTIMATE.start_main_~a_copy~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (- 4)) (- 4))) (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))))) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= (+ |ULTIMATE.start_main_~i~0#1| 1) ~SIZE~0))' at error location [2024-11-14 04:18:46,139 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:18:46,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:18:46,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 19] total 53 [2024-11-14 04:18:46,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913058628] [2024-11-14 04:18:46,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:18:46,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-14 04:18:46,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:18:46,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-14 04:18:46,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=2221, Unknown=9, NotChecked=936, Total=3422 [2024-11-14 04:18:46,141 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 53 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 53 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:18:52,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:18:52,081 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2024-11-14 04:18:52,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-14 04:18:52,082 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 53 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-14 04:18:52,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:18:52,082 INFO L225 Difference]: With dead ends: 58 [2024-11-14 04:18:52,082 INFO L226 Difference]: Without dead ends: 56 [2024-11-14 04:18:52,084 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 1408 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=629, Invalid=4090, Unknown=9, NotChecked=1278, Total=6006 [2024-11-14 04:18:52,085 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 115 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 315 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-14 04:18:52,085 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 94 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 494 Invalid, 0 Unknown, 315 Unchecked, 1.8s Time] [2024-11-14 04:18:52,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-14 04:18:52,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2024-11-14 04:18:52,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 51 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:18:52,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2024-11-14 04:18:52,103 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 24 [2024-11-14 04:18:52,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:18:52,103 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2024-11-14 04:18:52,104 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 53 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:18:52,104 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2024-11-14 04:18:52,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-14 04:18:52,104 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:18:52,104 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:18:52,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-14 04:18:52,304 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-14 04:18:52,305 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:18:52,305 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:18:52,305 INFO L85 PathProgramCache]: Analyzing trace with hash -603304495, now seen corresponding path program 8 times [2024-11-14 04:18:52,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:18:52,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686659896] [2024-11-14 04:18:52,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:18:52,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:18:52,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:18:58,032 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:18:58,032 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:18:58,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686659896] [2024-11-14 04:18:58,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686659896] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:18:58,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550899865] [2024-11-14 04:18:58,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:18:58,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:18:58,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:18:58,034 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:18:58,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8827d36-1032-4859-9289-f1fbf80f87c6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 04:18:58,279 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 04:18:58,280 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:18:58,283 INFO L255 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-11-14 04:18:58,289 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:18:58,317 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-11-14 04:18:58,317 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 40 treesize of output 34 [2024-11-14 04:18:58,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2024-11-14 04:18:58,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-14 04:18:59,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 28 [2024-11-14 04:18:59,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2024-11-14 04:18:59,379 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:18:59,379 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 4 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 50 [2024-11-14 04:18:59,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2024-11-14 04:18:59,644 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:18:59,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 72 [2024-11-14 04:18:59,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 47 [2024-11-14 04:19:00,151 INFO L349 Elim1Store]: treesize reduction 72, result has 23.4 percent of original size [2024-11-14 04:19:00,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 9 case distinctions, treesize of input 79 treesize of output 99 [2024-11-14 04:19:00,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 64 [2024-11-14 04:19:00,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 104 [2024-11-14 04:19:00,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:19:00,963 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2024-11-14 04:19:00,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 120 treesize of output 124 [2024-11-14 04:19:01,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:19:01,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:19:01,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:19:01,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 110 [2024-11-14 04:19:01,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 37 [2024-11-14 04:19:01,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 40 [2024-11-14 04:19:01,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 27 treesize of output 20 [2024-11-14 04:19:01,503 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2024-11-14 04:19:01,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 40 [2024-11-14 04:19:01,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 61 [2024-11-14 04:19:01,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 38 [2024-11-14 04:19:01,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 27 treesize of output 20 [2024-11-14 04:19:02,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:19:02,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2024-11-14 04:19:02,351 INFO L349 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2024-11-14 04:19:02,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 24 [2024-11-14 04:19:02,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 38 [2024-11-14 04:19:02,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2024-11-14 04:19:02,938 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 24 treesize of output 20 [2024-11-14 04:19:03,007 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 45 [2024-11-14 04:19:03,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2024-11-14 04:19:03,035 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 9 treesize of output 7 [2024-11-14 04:19:03,305 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 45 [2024-11-14 04:19:03,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2024-11-14 04:19:03,331 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 9 treesize of output 7 [2024-11-14 04:19:03,568 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 45 [2024-11-14 04:19:03,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2024-11-14 04:19:03,596 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 9 treesize of output 7 [2024-11-14 04:19:04,154 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 04:19:04,154 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:20:06,843 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:20:06,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51596 treesize of output 26364