./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/nested3-1_abstracted.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_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/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_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/nested3-1_abstracted.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/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_0aea75d7-556f-4b98-8305-f0f19d35764b/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 898ef25fdb2ae04f56304d500631f410c196b9a77fbfba6f83248dcfc33b301f --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 05:46:09,209 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 05:46:09,280 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 05:46:09,286 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 05:46:09,287 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 05:46:09,327 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 05:46:09,328 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 05:46:09,328 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 05:46:09,329 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 05:46:09,329 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 05:46:09,330 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 05:46:09,330 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 05:46:09,331 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 05:46:09,331 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 05:46:09,331 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 05:46:09,331 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 05:46:09,332 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 05:46:09,332 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 05:46:09,332 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 05:46:09,332 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 05:46:09,332 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 05:46:09,333 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 05:46:09,333 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 05:46:09,333 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 05:46:09,334 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 05:46:09,334 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 05:46:09,334 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 05:46:09,334 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 05:46:09,334 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 05:46:09,335 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 05:46:09,335 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 05:46:09,335 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 05:46:09,335 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 05:46:09,335 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 05:46:09,335 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 05:46:09,336 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 05:46:09,336 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 05:46:09,336 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 05:46:09,336 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 05:46:09,336 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 05:46:09,336 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 05:46:09,336 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 05:46:09,336 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 05:46:09,336 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 05:46:09,337 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 05:46:09,337 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 05:46:09,338 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 05:46:09,338 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_0aea75d7-556f-4b98-8305-f0f19d35764b/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 -> 898ef25fdb2ae04f56304d500631f410c196b9a77fbfba6f83248dcfc33b301f [2024-11-14 05:46:09,846 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 05:46:09,861 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 05:46:09,864 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 05:46:09,865 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 05:46:09,866 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 05:46:09,870 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/loops-crafted-1/nested3-1_abstracted.c Unable to find full path for "g++" [2024-11-14 05:46:12,178 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 05:46:12,525 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 05:46:12,529 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/sv-benchmarks/c/loops-crafted-1/nested3-1_abstracted.c [2024-11-14 05:46:12,560 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/data/658605f58/5e36c9586e654054bdb6ec2bd085e5ee/FLAG895a8efe2 [2024-11-14 05:46:12,788 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/data/658605f58/5e36c9586e654054bdb6ec2bd085e5ee [2024-11-14 05:46:12,791 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 05:46:12,792 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 05:46:12,794 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 05:46:12,794 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 05:46:12,800 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 05:46:12,801 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 05:46:12" (1/1) ... [2024-11-14 05:46:12,802 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6450dc5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:46:12, skipping insertion in model container [2024-11-14 05:46:12,802 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 05:46:12" (1/1) ... [2024-11-14 05:46:12,819 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 05:46:13,052 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_0aea75d7-556f-4b98-8305-f0f19d35764b/sv-benchmarks/c/loops-crafted-1/nested3-1_abstracted.c[739,752] [2024-11-14 05:46:13,080 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 05:46:13,095 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 05:46:13,112 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_0aea75d7-556f-4b98-8305-f0f19d35764b/sv-benchmarks/c/loops-crafted-1/nested3-1_abstracted.c[739,752] [2024-11-14 05:46:13,126 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 05:46:13,154 INFO L204 MainTranslator]: Completed translation [2024-11-14 05:46:13,155 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:46:13 WrapperNode [2024-11-14 05:46:13,155 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 05:46:13,156 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 05:46:13,157 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 05:46:13,157 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 05:46:13,165 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:46:13" (1/1) ... [2024-11-14 05:46:13,172 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:46:13" (1/1) ... [2024-11-14 05:46:13,196 INFO L138 Inliner]: procedures = 20, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 44 [2024-11-14 05:46:13,198 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 05:46:13,199 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 05:46:13,199 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 05:46:13,199 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 05:46:13,210 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:46:13" (1/1) ... [2024-11-14 05:46:13,211 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:46:13" (1/1) ... [2024-11-14 05:46:13,212 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:46:13" (1/1) ... [2024-11-14 05:46:13,213 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:46:13" (1/1) ... [2024-11-14 05:46:13,217 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:46:13" (1/1) ... [2024-11-14 05:46:13,225 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:46:13" (1/1) ... [2024-11-14 05:46:13,230 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:46:13" (1/1) ... [2024-11-14 05:46:13,231 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:46:13" (1/1) ... [2024-11-14 05:46:13,232 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 05:46:13,236 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 05:46:13,236 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 05:46:13,236 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 05:46:13,238 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:46:13" (1/1) ... [2024-11-14 05:46:13,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 05:46:13,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:46:13,287 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 05:46:13,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 05:46:13,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 05:46:13,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 05:46:13,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 05:46:13,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 05:46:13,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-14 05:46:13,317 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-14 05:46:13,386 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 05:46:13,388 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 05:46:13,552 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-11-14 05:46:13,552 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 05:46:13,640 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 05:46:13,641 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-14 05:46:13,641 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 05:46:13 BoogieIcfgContainer [2024-11-14 05:46:13,641 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 05:46:13,650 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 05:46:13,650 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 05:46:13,655 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 05:46:13,656 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 05:46:12" (1/3) ... [2024-11-14 05:46:13,656 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13ec4a76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 05:46:13, skipping insertion in model container [2024-11-14 05:46:13,657 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:46:13" (2/3) ... [2024-11-14 05:46:13,657 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13ec4a76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 05:46:13, skipping insertion in model container [2024-11-14 05:46:13,657 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 05:46:13" (3/3) ... [2024-11-14 05:46:13,658 INFO L112 eAbstractionObserver]: Analyzing ICFG nested3-1_abstracted.c [2024-11-14 05:46:13,678 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 05:46:13,680 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG nested3-1_abstracted.c that has 2 procedures, 16 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-14 05:46:13,765 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 05:46:13,781 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;@d61fcbf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 05:46:13,782 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 05:46:13,787 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 05:46:13,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-14 05:46:13,797 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:46:13,798 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-14 05:46:13,798 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:46:13,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:46:13,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1150916419, now seen corresponding path program 1 times [2024-11-14 05:46:13,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:46:13,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101661654] [2024-11-14 05:46:13,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:46:13,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:46:13,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:46:14,064 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 05:46:14,065 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:46:14,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101661654] [2024-11-14 05:46:14,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101661654] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:46:14,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:46:14,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 05:46:14,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029332274] [2024-11-14 05:46:14,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:46:14,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:46:14,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:46:14,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:46:14,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:46:14,108 INFO L87 Difference]: Start difference. First operand has 16 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:46:14,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:46:14,202 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2024-11-14 05:46:14,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:46:14,207 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-14 05:46:14,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:46:14,216 INFO L225 Difference]: With dead ends: 37 [2024-11-14 05:46:14,217 INFO L226 Difference]: Without dead ends: 20 [2024-11-14 05:46:14,225 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 05:46:14,230 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 4 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:46:14,230 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 24 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:46:14,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-14 05:46:14,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 15. [2024-11-14 05:46:14,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 05:46:14,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2024-11-14 05:46:14,285 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 6 [2024-11-14 05:46:14,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:46:14,286 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2024-11-14 05:46:14,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:46:14,286 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2024-11-14 05:46:14,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-14 05:46:14,289 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:46:14,289 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:46:14,289 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 05:46:14,289 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:46:14,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:46:14,291 INFO L85 PathProgramCache]: Analyzing trace with hash 842364463, now seen corresponding path program 1 times [2024-11-14 05:46:14,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:46:14,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861838871] [2024-11-14 05:46:14,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:46:14,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:46:14,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:46:14,660 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 05:46:14,660 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:46:14,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861838871] [2024-11-14 05:46:14,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861838871] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:46:14,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:46:14,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 05:46:14,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355400606] [2024-11-14 05:46:14,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:46:14,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 05:46:14,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:46:14,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 05:46:14,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:46:14,664 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:46:14,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:46:14,787 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2024-11-14 05:46:14,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 05:46:14,788 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-14 05:46:14,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:46:14,789 INFO L225 Difference]: With dead ends: 26 [2024-11-14 05:46:14,789 INFO L226 Difference]: Without dead ends: 24 [2024-11-14 05:46:14,790 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:46:14,791 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 8 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:46:14,791 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 51 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:46:14,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-14 05:46:14,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2024-11-14 05:46:14,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 05:46:14,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2024-11-14 05:46:14,799 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 7 [2024-11-14 05:46:14,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:46:14,799 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2024-11-14 05:46:14,799 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:46:14,799 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2024-11-14 05:46:14,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-14 05:46:14,800 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:46:14,800 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:46:14,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 05:46:14,801 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:46:14,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:46:14,802 INFO L85 PathProgramCache]: Analyzing trace with hash 834112356, now seen corresponding path program 1 times [2024-11-14 05:46:14,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:46:14,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180273648] [2024-11-14 05:46:14,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:46:14,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:46:14,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:46:14,899 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 05:46:14,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:46:14,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180273648] [2024-11-14 05:46:14,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180273648] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:46:14,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:46:14,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 05:46:14,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499932958] [2024-11-14 05:46:14,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:46:14,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:46:14,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:46:14,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:46:14,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:46:14,902 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:46:14,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:46:14,953 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2024-11-14 05:46:14,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:46:14,954 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-14 05:46:14,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:46:14,955 INFO L225 Difference]: With dead ends: 39 [2024-11-14 05:46:14,955 INFO L226 Difference]: Without dead ends: 22 [2024-11-14 05:46:14,956 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 05:46:14,957 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:46:14,958 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 23 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:46:14,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-14 05:46:14,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2024-11-14 05:46:14,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 05:46:14,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2024-11-14 05:46:14,966 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 7 [2024-11-14 05:46:14,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:46:14,966 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2024-11-14 05:46:14,966 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:46:14,967 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2024-11-14 05:46:14,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-14 05:46:14,967 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:46:14,967 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:46:14,968 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 05:46:14,968 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:46:14,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:46:14,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1751306862, now seen corresponding path program 1 times [2024-11-14 05:46:14,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:46:14,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970366560] [2024-11-14 05:46:14,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:46:14,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:46:14,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:46:15,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:46:15,150 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:46:15,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970366560] [2024-11-14 05:46:15,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970366560] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:46:15,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852101573] [2024-11-14 05:46:15,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:46:15,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:46:15,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:46:15,155 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:46:15,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 05:46:15,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:46:15,251 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-14 05:46:15,256 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:46:15,366 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:46:15,366 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:46:15,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:46:15,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852101573] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:46:15,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [865234214] [2024-11-14 05:46:15,534 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-14 05:46:15,535 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:46:15,539 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:46:15,545 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:46:15,546 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:46:16,894 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 77 for LOIs [2024-11-14 05:46:17,643 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:46:21,723 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '361#(and (= |__VERIFIER_assert_#in~cond| 0) (exists ((|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_12| Int)) (and (<= 1 |#StackHeapBarrier|) (= (mod |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_12| 2) 0) (= |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_9| 0) (<= 1 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_12|) (<= 268435455 (mod |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_12| 4294967296)))))' at error location [2024-11-14 05:46:21,723 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:46:21,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:46:21,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 11 [2024-11-14 05:46:21,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743736701] [2024-11-14 05:46:21,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:46:21,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-14 05:46:21,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:46:21,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-14 05:46:21,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2024-11-14 05:46:21,727 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 05:46:21,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:46:21,943 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2024-11-14 05:46:21,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 05:46:21,944 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14 [2024-11-14 05:46:21,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:46:21,945 INFO L225 Difference]: With dead ends: 54 [2024-11-14 05:46:21,947 INFO L226 Difference]: Without dead ends: 36 [2024-11-14 05:46:21,948 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2024-11-14 05:46:21,949 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 10 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:46:21,951 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 129 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:46:21,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-14 05:46:21,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2024-11-14 05:46:21,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-14 05:46:21,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2024-11-14 05:46:21,967 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 14 [2024-11-14 05:46:21,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:46:21,967 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2024-11-14 05:46:21,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 05:46:21,968 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2024-11-14 05:46:21,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-14 05:46:21,971 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:46:21,971 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-14 05:46:21,997 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 05:46:22,175 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:46:22,176 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:46:22,176 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:46:22,177 INFO L85 PathProgramCache]: Analyzing trace with hash -308974556, now seen corresponding path program 2 times [2024-11-14 05:46:22,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:46:22,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70732037] [2024-11-14 05:46:22,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:46:22,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:46:22,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:46:22,366 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 05:46:22,366 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:46:22,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70732037] [2024-11-14 05:46:22,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70732037] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:46:22,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415674851] [2024-11-14 05:46:22,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:46:22,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:46:22,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:46:22,371 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:46:22,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 05:46:22,453 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 05:46:22,453 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:46:22,454 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 05:46:22,456 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:46:22,497 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 05:46:22,497 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:46:22,592 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 05:46:22,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415674851] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:46:22,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1785536551] [2024-11-14 05:46:22,597 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-14 05:46:22,597 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:46:22,597 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:46:22,598 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:46:22,598 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:46:23,122 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 77 for LOIs [2024-11-14 05:46:23,487 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:46:25,835 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '635#(and (= |__VERIFIER_assert_#in~cond| 0) (exists ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_26| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_19| Int)) (and (<= 1 |#StackHeapBarrier|) (= (mod |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_26| 2) 0) (= |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_19| 0) (<= 1 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_26|) (<= 268435455 (mod |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_26| 4294967296)))))' at error location [2024-11-14 05:46:25,835 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:46:25,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:46:25,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-11-14 05:46:25,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849923517] [2024-11-14 05:46:25,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:46:25,836 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-14 05:46:25,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:46:25,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-14 05:46:25,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2024-11-14 05:46:25,841 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-14 05:46:26,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:46:26,009 INFO L93 Difference]: Finished difference Result 72 states and 90 transitions. [2024-11-14 05:46:26,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 05:46:26,010 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 21 [2024-11-14 05:46:26,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:46:26,012 INFO L225 Difference]: With dead ends: 72 [2024-11-14 05:46:26,013 INFO L226 Difference]: Without dead ends: 43 [2024-11-14 05:46:26,013 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2024-11-14 05:46:26,014 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:46:26,015 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 52 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:46:26,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-14 05:46:26,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-11-14 05:46:26,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 31 states have internal predecessors, (33), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-14 05:46:26,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2024-11-14 05:46:26,026 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 21 [2024-11-14 05:46:26,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:46:26,026 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2024-11-14 05:46:26,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-14 05:46:26,027 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2024-11-14 05:46:26,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-14 05:46:26,028 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:46:26,028 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2024-11-14 05:46:26,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-14 05:46:26,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:46:26,232 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:46:26,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:46:26,233 INFO L85 PathProgramCache]: Analyzing trace with hash -428589660, now seen corresponding path program 3 times [2024-11-14 05:46:26,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:46:26,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229333995] [2024-11-14 05:46:26,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:46:26,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:46:26,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:46:26,591 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 12 proven. 51 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-14 05:46:26,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:46:26,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229333995] [2024-11-14 05:46:26,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229333995] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:46:26,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498656065] [2024-11-14 05:46:26,592 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:46:26,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:46:26,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:46:26,594 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:46:26,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 05:46:26,678 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:46:26,679 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:46:26,680 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-14 05:46:26,682 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:46:26,752 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 12 proven. 51 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-14 05:46:26,753 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:46:27,062 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 12 proven. 51 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-14 05:46:27,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498656065] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:46:27,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [419804735] [2024-11-14 05:46:27,066 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-14 05:46:27,066 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:46:27,066 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:46:27,067 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:46:27,067 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:46:27,423 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 77 for LOIs [2024-11-14 05:46:27,673 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:46:30,437 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1137#(and (= |__VERIFIER_assert_#in~cond| 0) (exists ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_48| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_29| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 268435455 (mod |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_48| 4294967296)) (= (mod |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_48| 2) 0) (<= 1 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_48|) (= |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_29| 0))))' at error location [2024-11-14 05:46:30,438 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:46:30,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:46:30,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2024-11-14 05:46:30,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011652417] [2024-11-14 05:46:30,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:46:30,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-14 05:46:30,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:46:30,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-14 05:46:30,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2024-11-14 05:46:30,441 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 13 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-14 05:46:31,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:46:31,441 INFO L93 Difference]: Finished difference Result 108 states and 142 transitions. [2024-11-14 05:46:31,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-14 05:46:31,444 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 13 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 49 [2024-11-14 05:46:31,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:46:31,446 INFO L225 Difference]: With dead ends: 108 [2024-11-14 05:46:31,446 INFO L226 Difference]: Without dead ends: 67 [2024-11-14 05:46:31,447 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=223, Invalid=769, Unknown=0, NotChecked=0, Total=992 [2024-11-14 05:46:31,448 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:46:31,448 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 136 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:46:31,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-14 05:46:31,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-11-14 05:46:31,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 47 states have internal predecessors, (49), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-14 05:46:31,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 84 transitions. [2024-11-14 05:46:31,466 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 84 transitions. Word has length 49 [2024-11-14 05:46:31,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:46:31,466 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 84 transitions. [2024-11-14 05:46:31,467 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 13 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-14 05:46:31,467 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 84 transitions. [2024-11-14 05:46:31,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-11-14 05:46:31,470 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:46:31,470 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2024-11-14 05:46:31,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 05:46:31,671 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-14 05:46:31,671 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:46:31,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:46:31,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1410212004, now seen corresponding path program 4 times [2024-11-14 05:46:31,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:46:31,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006545855] [2024-11-14 05:46:31,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:46:31,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:46:31,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:46:32,519 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 28 proven. 287 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-11-14 05:46:32,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:46:32,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006545855] [2024-11-14 05:46:32,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006545855] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:46:32,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086670471] [2024-11-14 05:46:32,519 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:46:32,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:46:32,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:46:32,525 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:46:32,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 05:46:32,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:46:32,650 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-14 05:46:32,655 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:46:32,792 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 28 proven. 287 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-11-14 05:46:32,792 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:46:33,658 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 28 proven. 287 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-11-14 05:46:33,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086670471] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:46:33,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [937431047] [2024-11-14 05:46:33,662 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-14 05:46:33,662 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:46:33,662 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:46:33,662 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:46:33,662 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:46:34,049 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 77 for LOIs [2024-11-14 05:46:34,310 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:46:38,761 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2099#(and (exists ((|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_39| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_86| Int)) (and (<= 1 |#StackHeapBarrier|) (= (mod |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_86| 2) 0) (<= 268435455 (mod |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_86| 4294967296)) (= |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_39| 0) (<= 1 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_86|))) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 05:46:38,761 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:46:38,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:46:38,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2024-11-14 05:46:38,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761424584] [2024-11-14 05:46:38,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:46:38,763 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-14 05:46:38,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:46:38,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-14 05:46:38,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=1377, Unknown=0, NotChecked=0, Total=1722 [2024-11-14 05:46:38,766 INFO L87 Difference]: Start difference. First operand 67 states and 84 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 29 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-11-14 05:46:56,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:46:56,061 INFO L93 Difference]: Finished difference Result 180 states and 246 transitions. [2024-11-14 05:46:56,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-14 05:46:56,062 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 29 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 105 [2024-11-14 05:46:56,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:46:56,065 INFO L225 Difference]: With dead ends: 180 [2024-11-14 05:46:56,065 INFO L226 Difference]: Without dead ends: 115 [2024-11-14 05:46:56,067 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=807, Invalid=2273, Unknown=0, NotChecked=0, Total=3080 [2024-11-14 05:46:56,068 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 17 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 05:46:56,068 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 400 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 05:46:56,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-11-14 05:46:56,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2024-11-14 05:46:56,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 77 states have (on average 1.051948051948052) internal successors, (81), 79 states have internal predecessors, (81), 34 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2024-11-14 05:46:56,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 148 transitions. [2024-11-14 05:46:56,098 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 148 transitions. Word has length 105 [2024-11-14 05:46:56,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:46:56,099 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 148 transitions. [2024-11-14 05:46:56,099 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 29 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-11-14 05:46:56,099 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 148 transitions. [2024-11-14 05:46:56,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2024-11-14 05:46:56,106 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:46:56,107 INFO L215 NwaCegarLoop]: trace histogram [31, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1] [2024-11-14 05:46:56,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-14 05:46:56,311 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-14 05:46:56,311 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:46:56,312 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:46:56,312 INFO L85 PathProgramCache]: Analyzing trace with hash -248322396, now seen corresponding path program 5 times [2024-11-14 05:46:56,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:46:56,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583232335] [2024-11-14 05:46:56,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:46:56,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:46:56,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:46:58,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3135 backedges. 60 proven. 1335 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2024-11-14 05:46:58,748 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:46:58,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583232335] [2024-11-14 05:46:58,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583232335] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:46:58,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501897244] [2024-11-14 05:46:58,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:46:58,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:46:58,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:46:58,751 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:46:58,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 05:46:59,034 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 05:46:59,034 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:46:59,036 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-14 05:46:59,042 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:46:59,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3135 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 2987 trivial. 0 not checked. [2024-11-14 05:46:59,597 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:46:59,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501897244] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:46:59,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:46:59,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [33] total 38 [2024-11-14 05:46:59,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510045855] [2024-11-14 05:46:59,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:46:59,598 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 05:46:59,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:46:59,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 05:46:59,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1242, Unknown=0, NotChecked=0, Total=1406 [2024-11-14 05:46:59,600 INFO L87 Difference]: Start difference. First operand 115 states and 148 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 05:46:59,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:46:59,925 INFO L93 Difference]: Finished difference Result 121 states and 153 transitions. [2024-11-14 05:46:59,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 05:46:59,926 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 217 [2024-11-14 05:46:59,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:46:59,928 INFO L225 Difference]: With dead ends: 121 [2024-11-14 05:46:59,928 INFO L226 Difference]: Without dead ends: 117 [2024-11-14 05:46:59,933 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=201, Invalid=1359, Unknown=0, NotChecked=0, Total=1560 [2024-11-14 05:46:59,934 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 8 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:46:59,935 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 57 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:46:59,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-11-14 05:46:59,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 109. [2024-11-14 05:46:59,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 32 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2024-11-14 05:46:59,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 139 transitions. [2024-11-14 05:46:59,995 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 139 transitions. Word has length 217 [2024-11-14 05:46:59,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:46:59,996 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 139 transitions. [2024-11-14 05:46:59,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 05:46:59,996 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 139 transitions. [2024-11-14 05:47:00,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2024-11-14 05:47:00,004 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:47:00,005 INFO L215 NwaCegarLoop]: trace histogram [32, 31, 31, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:47:00,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 05:47:00,207 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-14 05:47:00,208 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:47:00,208 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:47:00,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1291246789, now seen corresponding path program 1 times [2024-11-14 05:47:00,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:47:00,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530134757] [2024-11-14 05:47:00,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:00,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:47:00,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:47:02,293 INFO L134 CoverageAnalysis]: Checked inductivity of 3258 backedges. 63 proven. 1335 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2024-11-14 05:47:02,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:47:02,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530134757] [2024-11-14 05:47:02,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530134757] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:47:02,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478796184] [2024-11-14 05:47:02,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:02,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:47:02,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:47:02,296 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:47:02,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 05:47:02,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:47:02,492 INFO L255 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-14 05:47:02,504 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:47:02,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3258 backedges. 62 proven. 118 refuted. 0 times theorem prover too weak. 3078 trivial. 0 not checked. [2024-11-14 05:47:02,891 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:47:03,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3258 backedges. 178 proven. 2 refuted. 0 times theorem prover too weak. 3078 trivial. 0 not checked. [2024-11-14 05:47:03,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478796184] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:47:03,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [549518045] [2024-11-14 05:47:03,617 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 05:47:03,617 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:47:03,617 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:47:03,618 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:47:03,618 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:47:04,411 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-14 05:47:04,415 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:47:04,886 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5065#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-14 05:47:04,887 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:47:04,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:47:04,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 6, 6] total 41 [2024-11-14 05:47:04,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456562531] [2024-11-14 05:47:04,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:47:04,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-14 05:47:04,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:47:04,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-14 05:47:04,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2194, Unknown=0, NotChecked=0, Total=2352 [2024-11-14 05:47:04,891 INFO L87 Difference]: Start difference. First operand 109 states and 139 transitions. Second operand has 41 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 41 states have internal predecessors, (91), 35 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (37), 35 states have call predecessors, (37), 35 states have call successors, (37) [2024-11-14 05:47:13,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:47:13,409 INFO L93 Difference]: Finished difference Result 518 states and 689 transitions. [2024-11-14 05:47:13,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2024-11-14 05:47:13,410 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 41 states have internal predecessors, (91), 35 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (37), 35 states have call predecessors, (37), 35 states have call successors, (37) Word has length 224 [2024-11-14 05:47:13,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:47:13,416 INFO L225 Difference]: With dead ends: 518 [2024-11-14 05:47:13,416 INFO L226 Difference]: Without dead ends: 411 [2024-11-14 05:47:13,425 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 828 GetRequests, 657 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8583 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1723, Invalid=28033, Unknown=0, NotChecked=0, Total=29756 [2024-11-14 05:47:13,426 INFO L432 NwaCegarLoop]: 130 mSDtfsCounter, 271 mSDsluCounter, 974 mSDsCounter, 0 mSdLazyCounter, 6126 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 1104 SdHoareTripleChecker+Invalid, 6263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 6126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2024-11-14 05:47:13,426 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 1104 Invalid, 6263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 6126 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2024-11-14 05:47:13,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2024-11-14 05:47:13,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 403. [2024-11-14 05:47:13,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 271 states have (on average 1.018450184501845) internal successors, (276), 271 states have internal predecessors, (276), 129 states have call successors, (129), 3 states have call predecessors, (129), 2 states have return successors, (128), 128 states have call predecessors, (128), 128 states have call successors, (128) [2024-11-14 05:47:13,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 533 transitions. [2024-11-14 05:47:13,542 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 533 transitions. Word has length 224 [2024-11-14 05:47:13,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:47:13,543 INFO L471 AbstractCegarLoop]: Abstraction has 403 states and 533 transitions. [2024-11-14 05:47:13,543 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 41 states have internal predecessors, (91), 35 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (37), 35 states have call predecessors, (37), 35 states have call successors, (37) [2024-11-14 05:47:13,543 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 533 transitions. [2024-11-14 05:47:13,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 907 [2024-11-14 05:47:13,579 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:47:13,579 INFO L215 NwaCegarLoop]: trace histogram [129, 128, 128, 124, 124, 124, 124, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2024-11-14 05:47:13,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 05:47:13,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:47:13,780 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:47:13,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:47:13,781 INFO L85 PathProgramCache]: Analyzing trace with hash -757803587, now seen corresponding path program 2 times [2024-11-14 05:47:13,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:47:13,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892285848] [2024-11-14 05:47:13,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:13,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:47:15,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:47:21,063 INFO L134 CoverageAnalysis]: Checked inductivity of 56170 backedges. 9098 proven. 1426 refuted. 0 times theorem prover too weak. 45646 trivial. 0 not checked. [2024-11-14 05:47:21,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:47:21,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892285848] [2024-11-14 05:47:21,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892285848] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:47:21,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291343415] [2024-11-14 05:47:21,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:47:21,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:47:21,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:47:21,066 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:47:21,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 05:47:22,609 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2024-11-14 05:47:22,609 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:47:22,614 INFO L255 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-14 05:47:22,646 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:47:22,943 INFO L134 CoverageAnalysis]: Checked inductivity of 56170 backedges. 9610 proven. 1426 refuted. 0 times theorem prover too weak. 45134 trivial. 0 not checked. [2024-11-14 05:47:22,943 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:47:26,095 INFO L134 CoverageAnalysis]: Checked inductivity of 56170 backedges. 9104 proven. 1426 refuted. 0 times theorem prover too weak. 45640 trivial. 0 not checked. [2024-11-14 05:47:26,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291343415] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:47:26,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [82139647] [2024-11-14 05:47:26,098 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 05:47:26,098 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:47:26,098 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:47:26,099 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:47:26,099 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:47:26,806 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-14 05:47:26,810 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:47:27,425 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12346#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-14 05:47:27,425 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:47:27,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:47:27,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 67 [2024-11-14 05:47:27,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113910978] [2024-11-14 05:47:27,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:47:27,428 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-11-14 05:47:27,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:47:27,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-11-14 05:47:27,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1242, Invalid=4308, Unknown=0, NotChecked=0, Total=5550 [2024-11-14 05:47:27,433 INFO L87 Difference]: Start difference. First operand 403 states and 533 transitions. Second operand has 67 states, 67 states have (on average 2.2388059701492535) internal successors, (150), 67 states have internal predecessors, (150), 64 states have call successors, (68), 2 states have call predecessors, (68), 2 states have return successors, (67), 64 states have call predecessors, (67), 64 states have call successors, (67) [2024-11-14 05:47:35,081 WARN L286 SmtUtils]: Spent 5.26s on a formula simplification. DAG size of input: 130 DAG size of output: 10 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:47:43,796 WARN L286 SmtUtils]: Spent 6.45s on a formula simplification. DAG size of input: 126 DAG size of output: 10 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:48:07,178 WARN L286 SmtUtils]: Spent 7.81s on a formula simplification. DAG size of input: 118 DAG size of output: 10 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:48:22,847 WARN L286 SmtUtils]: Spent 7.19s on a formula simplification. DAG size of input: 114 DAG size of output: 14 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:54:01,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:54:01,167 INFO L93 Difference]: Finished difference Result 1106 states and 1598 transitions. [2024-11-14 05:54:01,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-11-14 05:54:01,168 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.2388059701492535) internal successors, (150), 67 states have internal predecessors, (150), 64 states have call successors, (68), 2 states have call predecessors, (68), 2 states have return successors, (67), 64 states have call predecessors, (67), 64 states have call successors, (67) Word has length 906 [2024-11-14 05:54:01,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:54:01,174 INFO L225 Difference]: With dead ends: 1106 [2024-11-14 05:54:01,174 INFO L226 Difference]: Without dead ends: 799 [2024-11-14 05:54:01,178 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2782 GetRequests, 2678 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 394.8s TimeCoverageRelationStatistics Valid=3262, Invalid=7811, Unknown=57, NotChecked=0, Total=11130 [2024-11-14 05:54:01,179 INFO L432 NwaCegarLoop]: 74 mSDtfsCounter, 35 mSDsluCounter, 1312 mSDsCounter, 0 mSdLazyCounter, 3343 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1386 SdHoareTripleChecker+Invalid, 3378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 3343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:54:01,179 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1386 Invalid, 3378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 3343 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-14 05:54:01,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2024-11-14 05:54:01,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 799. [2024-11-14 05:54:01,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 535 states have (on average 1.0093457943925233) internal successors, (540), 535 states have internal predecessors, (540), 261 states have call successors, (261), 3 states have call predecessors, (261), 2 states have return successors, (260), 260 states have call predecessors, (260), 260 states have call successors, (260) [2024-11-14 05:54:01,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1061 transitions. [2024-11-14 05:54:01,416 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1061 transitions. Word has length 906 [2024-11-14 05:54:01,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:54:01,418 INFO L471 AbstractCegarLoop]: Abstraction has 799 states and 1061 transitions. [2024-11-14 05:54:01,419 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.2388059701492535) internal successors, (150), 67 states have internal predecessors, (150), 64 states have call successors, (68), 2 states have call predecessors, (68), 2 states have return successors, (67), 64 states have call predecessors, (67), 64 states have call successors, (67) [2024-11-14 05:54:01,421 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1061 transitions. [2024-11-14 05:54:01,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1831 [2024-11-14 05:54:01,515 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:54:01,515 INFO L215 NwaCegarLoop]: trace histogram [261, 260, 260, 256, 256, 256, 256, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2024-11-14 05:54:01,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 05:54:01,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:54:01,716 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:54:01,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:54:01,717 INFO L85 PathProgramCache]: Analyzing trace with hash 921430965, now seen corresponding path program 3 times [2024-11-14 05:54:01,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:54:01,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606233361] [2024-11-14 05:54:01,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:54:01,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:54:04,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:54:21,381 INFO L134 CoverageAnalysis]: Checked inductivity of 234172 backedges. 37775 proven. 6112 refuted. 0 times theorem prover too weak. 190285 trivial. 0 not checked. [2024-11-14 05:54:21,381 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:54:21,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606233361] [2024-11-14 05:54:21,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606233361] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:54:21,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892740224] [2024-11-14 05:54:21,381 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:54:21,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:54:21,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:54:21,383 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:54:21,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 05:54:22,296 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:54:22,296 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:54:22,311 INFO L255 TraceCheckSpWp]: Trace formula consists of 3933 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-14 05:54:22,332 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:54:23,817 INFO L134 CoverageAnalysis]: Checked inductivity of 234172 backedges. 520 proven. 75326 refuted. 0 times theorem prover too weak. 158326 trivial. 0 not checked. [2024-11-14 05:54:23,817 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:54:27,130 INFO L134 CoverageAnalysis]: Checked inductivity of 234172 backedges. 1300 proven. 74546 refuted. 0 times theorem prover too weak. 158326 trivial. 0 not checked. [2024-11-14 05:54:27,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892740224] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:54:27,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [552364318] [2024-11-14 05:54:27,132 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 05:54:27,132 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:54:27,132 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:54:27,133 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:54:27,133 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:54:27,680 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-14 05:54:27,683 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:54:28,455 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26647#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-14 05:54:28,455 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:54:28,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:54:28,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 12, 12] total 87 [2024-11-14 05:54:28,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66578229] [2024-11-14 05:54:28,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:54:28,458 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2024-11-14 05:54:28,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:54:28,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2024-11-14 05:54:28,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=8550, Unknown=0, NotChecked=0, Total=8930 [2024-11-14 05:54:28,462 INFO L87 Difference]: Start difference. First operand 799 states and 1061 transitions. Second operand has 87 states, 87 states have (on average 2.3563218390804597) internal successors, (205), 87 states have internal predecessors, (205), 81 states have call successors, (91), 2 states have call predecessors, (91), 1 states have return successors, (90), 81 states have call predecessors, (90), 81 states have call successors, (90) [2024-11-14 05:55:38,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:55:38,571 INFO L93 Difference]: Finished difference Result 2629 states and 3520 transitions. [2024-11-14 05:55:38,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 666 states. [2024-11-14 05:55:38,572 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.3563218390804597) internal successors, (205), 87 states have internal predecessors, (205), 81 states have call successors, (91), 2 states have call predecessors, (91), 1 states have return successors, (90), 81 states have call predecessors, (90), 81 states have call successors, (90) Word has length 1830 [2024-11-14 05:55:38,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:55:38,584 INFO L225 Difference]: With dead ends: 2629 [2024-11-14 05:55:38,584 INFO L226 Difference]: Without dead ends: 2025 [2024-11-14 05:55:38,612 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6209 GetRequests, 5463 SyntacticMatches, 0 SemanticMatches, 746 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222032 ImplicationChecksByTransitivity, 45.7s TimeCoverageRelationStatistics Valid=16546, Invalid=542210, Unknown=0, NotChecked=0, Total=558756 [2024-11-14 05:55:38,613 INFO L432 NwaCegarLoop]: 656 mSDtfsCounter, 953 mSDsluCounter, 25150 mSDsCounter, 0 mSdLazyCounter, 72628 mSolverCounterSat, 487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 957 SdHoareTripleChecker+Valid, 25806 SdHoareTripleChecker+Invalid, 73115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 487 IncrementalHoareTripleChecker+Valid, 72628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:55:38,613 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [957 Valid, 25806 Invalid, 73115 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [487 Valid, 72628 Invalid, 0 Unknown, 0 Unchecked, 26.5s Time] [2024-11-14 05:55:38,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2025 states. [2024-11-14 05:55:38,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2025 to 2005. [2024-11-14 05:55:38,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2005 states, 1341 states have (on average 1.0082028337061895) internal successors, (1352), 1341 states have internal predecessors, (1352), 661 states have call successors, (661), 3 states have call predecessors, (661), 2 states have return successors, (660), 660 states have call predecessors, (660), 660 states have call successors, (660) [2024-11-14 05:55:38,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2005 states to 2005 states and 2673 transitions. [2024-11-14 05:55:38,978 INFO L78 Accepts]: Start accepts. Automaton has 2005 states and 2673 transitions. Word has length 1830 [2024-11-14 05:55:38,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:55:38,979 INFO L471 AbstractCegarLoop]: Abstraction has 2005 states and 2673 transitions. [2024-11-14 05:55:38,980 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.3563218390804597) internal successors, (205), 87 states have internal predecessors, (205), 81 states have call successors, (91), 2 states have call predecessors, (91), 1 states have return successors, (90), 81 states have call predecessors, (90), 81 states have call successors, (90) [2024-11-14 05:55:38,980 INFO L276 IsEmpty]: Start isEmpty. Operand 2005 states and 2673 transitions. [2024-11-14 05:55:39,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4637 [2024-11-14 05:55:39,117 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:55:39,118 INFO L215 NwaCegarLoop]: trace histogram [661, 660, 660, 650, 650, 650, 650, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2024-11-14 05:55:39,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 05:55:39,319 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:55:39,319 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:55:39,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:55:39,320 INFO L85 PathProgramCache]: Analyzing trace with hash -2047453123, now seen corresponding path program 4 times [2024-11-14 05:55:39,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:55:39,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662425545] [2024-11-14 05:55:39,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:55:39,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:55:50,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:56:49,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1510665 backedges. 116584 proven. 6305 refuted. 0 times theorem prover too weak. 1387776 trivial. 0 not checked. [2024-11-14 05:56:49,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:56:49,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662425545] [2024-11-14 05:56:49,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662425545] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:56:49,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159944131] [2024-11-14 05:56:49,568 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:56:49,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:56:49,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:56:49,570 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:56:49,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aea75d7-556f-4b98-8305-f0f19d35764b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 05:56:52,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:56:52,185 INFO L255 TraceCheckSpWp]: Trace formula consists of 9933 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-14 05:56:52,260 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:56:56,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1510665 backedges. 1320 proven. 578265 refuted. 0 times theorem prover too weak. 931080 trivial. 0 not checked. [2024-11-14 05:56:56,747 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:57:06,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1510665 backedges. 3025 proven. 576560 refuted. 0 times theorem prover too weak. 931080 trivial. 0 not checked. [2024-11-14 05:57:06,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159944131] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:57:06,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1068151302] [2024-11-14 05:57:06,711 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 05:57:06,711 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:57:06,711 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:57:06,711 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:57:06,712 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:57:07,209 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-14 05:57:07,212 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:57:08,237 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '63602#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-14 05:57:08,237 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:57:08,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:57:08,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 24, 24] total 112 [2024-11-14 05:57:08,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174760779] [2024-11-14 05:57:08,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:57:08,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2024-11-14 05:57:08,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:57:08,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2024-11-14 05:57:08,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=839, Invalid=13441, Unknown=0, NotChecked=0, Total=14280 [2024-11-14 05:57:08,248 INFO L87 Difference]: Start difference. First operand 2005 states and 2673 transitions. Second operand has 112 states, 112 states have (on average 2.5982142857142856) internal successors, (291), 112 states have internal predecessors, (291), 106 states have call successors, (128), 2 states have call predecessors, (128), 1 states have return successors, (127), 106 states have call predecessors, (127), 106 states have call successors, (127)