./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.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_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/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_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/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_75676f10-63b7-4838-b2db-081b5bd58046/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 07a8b8b198dffd8285677bd0bfdd16b4d1f780e3a9696ef3e27a077e8ff12a49 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 03:21:25,052 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 03:21:25,178 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 03:21:25,187 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 03:21:25,187 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 03:21:25,233 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 03:21:25,234 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 03:21:25,234 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 03:21:25,234 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 03:21:25,235 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 03:21:25,235 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 03:21:25,235 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 03:21:25,235 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 03:21:25,235 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 03:21:25,236 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 03:21:25,236 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 03:21:25,236 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 03:21:25,236 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 03:21:25,237 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 03:21:25,238 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 03:21:25,238 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 03:21:25,238 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 03:21:25,238 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 03:21:25,238 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 03:21:25,239 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 03:21:25,239 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 03:21:25,239 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 03:21:25,239 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 03:21:25,239 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 03:21:25,239 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 03:21:25,239 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 03:21:25,239 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 03:21:25,239 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 03:21:25,239 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 03:21:25,240 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 03:21:25,240 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 03:21:25,240 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 03:21:25,240 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 03:21:25,240 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:21:25,241 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 03:21:25,241 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 03:21:25,241 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 03:21:25,242 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 03:21:25,242 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 03:21:25,242 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 03:21:25,242 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 03:21:25,242 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 03:21:25,243 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_75676f10-63b7-4838-b2db-081b5bd58046/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 -> 07a8b8b198dffd8285677bd0bfdd16b4d1f780e3a9696ef3e27a077e8ff12a49 [2024-11-14 03:21:25,671 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 03:21:25,685 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 03:21:25,689 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 03:21:25,691 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 03:21:25,691 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 03:21:25,695 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c Unable to find full path for "g++" [2024-11-14 03:21:28,133 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 03:21:28,539 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 03:21:28,540 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c [2024-11-14 03:21:28,577 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/data/c2fd734df/8d3fe057c24642af81a21cd6bea5965f/FLAG436ac4ebe [2024-11-14 03:21:28,637 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/data/c2fd734df/8d3fe057c24642af81a21cd6bea5965f [2024-11-14 03:21:28,641 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 03:21:28,643 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 03:21:28,644 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 03:21:28,644 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 03:21:28,650 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 03:21:28,651 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:21:28" (1/1) ... [2024-11-14 03:21:28,652 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4daf2be5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:21:28, skipping insertion in model container [2024-11-14 03:21:28,653 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:21:28" (1/1) ... [2024-11-14 03:21:28,672 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 03:21:28,882 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_75676f10-63b7-4838-b2db-081b5bd58046/sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c[342,355] [2024-11-14 03:21:28,937 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:21:28,950 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 03:21:28,967 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_75676f10-63b7-4838-b2db-081b5bd58046/sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c[342,355] [2024-11-14 03:21:28,997 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:21:29,020 INFO L204 MainTranslator]: Completed translation [2024-11-14 03:21:29,021 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:21:29 WrapperNode [2024-11-14 03:21:29,021 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 03:21:29,023 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 03:21:29,023 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 03:21:29,023 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 03:21:29,037 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:21:29" (1/1) ... [2024-11-14 03:21:29,051 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:21:29" (1/1) ... [2024-11-14 03:21:29,091 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 127 [2024-11-14 03:21:29,094 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 03:21:29,095 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 03:21:29,095 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 03:21:29,096 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 03:21:29,105 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:21:29" (1/1) ... [2024-11-14 03:21:29,106 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:21:29" (1/1) ... [2024-11-14 03:21:29,109 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:21:29" (1/1) ... [2024-11-14 03:21:29,109 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:21:29" (1/1) ... [2024-11-14 03:21:29,122 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:21:29" (1/1) ... [2024-11-14 03:21:29,131 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:21:29" (1/1) ... [2024-11-14 03:21:29,133 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:21:29" (1/1) ... [2024-11-14 03:21:29,137 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:21:29" (1/1) ... [2024-11-14 03:21:29,139 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 03:21:29,144 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 03:21:29,144 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 03:21:29,144 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 03:21:29,146 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:21:29" (1/1) ... [2024-11-14 03:21:29,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:21:29,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:21:29,200 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 03:21:29,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 03:21:29,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 03:21:29,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 03:21:29,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-14 03:21:29,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-14 03:21:29,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 03:21:29,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 03:21:29,240 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-14 03:21:29,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 03:21:29,372 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 03:21:29,374 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 03:21:29,705 INFO L? ?]: Removed 34 outVars from TransFormulas that were not future-live. [2024-11-14 03:21:29,705 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 03:21:29,842 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 03:21:29,842 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-14 03:21:29,842 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:21:29 BoogieIcfgContainer [2024-11-14 03:21:29,843 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 03:21:29,848 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 03:21:29,848 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 03:21:29,857 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 03:21:29,857 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 03:21:28" (1/3) ... [2024-11-14 03:21:29,859 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78e733f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:21:29, skipping insertion in model container [2024-11-14 03:21:29,859 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:21:29" (2/3) ... [2024-11-14 03:21:29,860 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78e733f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:21:29, skipping insertion in model container [2024-11-14 03:21:29,860 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:21:29" (3/3) ... [2024-11-14 03:21:29,862 INFO L112 eAbstractionObserver]: Analyzing ICFG check_removal_from_set_after_insertion.c [2024-11-14 03:21:29,882 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 03:21:29,884 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG check_removal_from_set_after_insertion.c that has 1 procedures, 17 locations, 1 initial locations, 6 loop locations, and 1 error locations. [2024-11-14 03:21:29,966 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 03:21:29,990 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;@2238c737, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 03:21:29,990 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 03:21:29,995 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:21:30,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-14 03:21:30,004 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:21:30,005 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:21:30,006 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:21:30,014 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:21:30,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1987070851, now seen corresponding path program 1 times [2024-11-14 03:21:30,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:21:30,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787286199] [2024-11-14 03:21:30,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:21:30,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:21:30,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:21:30,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:21:30,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:21:30,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787286199] [2024-11-14 03:21:30,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787286199] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:21:30,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:21:30,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:21:30,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463878023] [2024-11-14 03:21:30,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:21:30,417 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:21:30,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:21:30,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:21:30,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:21:30,450 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:21:30,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:21:30,567 INFO L93 Difference]: Finished difference Result 33 states and 51 transitions. [2024-11-14 03:21:30,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:21:30,572 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-14 03:21:30,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:21:30,584 INFO L225 Difference]: With dead ends: 33 [2024-11-14 03:21:30,584 INFO L226 Difference]: Without dead ends: 16 [2024-11-14 03:21:30,588 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:21:30,594 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:21:30,597 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:21:30,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-11-14 03:21:30,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-11-14 03:21:30,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:21:30,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 23 transitions. [2024-11-14 03:21:30,641 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 23 transitions. Word has length 9 [2024-11-14 03:21:30,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:21:30,643 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 23 transitions. [2024-11-14 03:21:30,644 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:21:30,644 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 23 transitions. [2024-11-14 03:21:30,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-14 03:21:30,645 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:21:30,645 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:21:30,646 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 03:21:30,647 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:21:30,648 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:21:30,648 INFO L85 PathProgramCache]: Analyzing trace with hash 69199769, now seen corresponding path program 1 times [2024-11-14 03:21:30,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:21:30,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051770618] [2024-11-14 03:21:30,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:21:30,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:21:30,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:21:30,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:21:30,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:21:30,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051770618] [2024-11-14 03:21:30,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051770618] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:21:30,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:21:30,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:21:30,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537304944] [2024-11-14 03:21:30,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:21:30,958 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:21:30,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:21:30,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:21:30,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:21:30,960 INFO L87 Difference]: Start difference. First operand 16 states and 23 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:21:31,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:21:31,045 INFO L93 Difference]: Finished difference Result 29 states and 42 transitions. [2024-11-14 03:21:31,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:21:31,047 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-14 03:21:31,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:21:31,047 INFO L225 Difference]: With dead ends: 29 [2024-11-14 03:21:31,047 INFO L226 Difference]: Without dead ends: 20 [2024-11-14 03:21:31,048 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:21:31,049 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 25 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:21:31,049 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 20 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:21:31,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-14 03:21:31,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2024-11-14 03:21:31,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:21:31,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 24 transitions. [2024-11-14 03:21:31,062 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 24 transitions. Word has length 10 [2024-11-14 03:21:31,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:21:31,062 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 24 transitions. [2024-11-14 03:21:31,062 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:21:31,062 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 24 transitions. [2024-11-14 03:21:31,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-14 03:21:31,063 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:21:31,063 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:21:31,065 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 03:21:31,065 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:21:31,066 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:21:31,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1891736093, now seen corresponding path program 1 times [2024-11-14 03:21:31,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:21:31,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303656721] [2024-11-14 03:21:31,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:21:31,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:21:31,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:21:31,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:21:31,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:21:31,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303656721] [2024-11-14 03:21:31,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303656721] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:21:31,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:21:31,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:21:31,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374312801] [2024-11-14 03:21:31,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:21:31,236 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:21:31,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:21:31,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:21:31,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:21:31,238 INFO L87 Difference]: Start difference. First operand 17 states and 24 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:21:31,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:21:31,305 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2024-11-14 03:21:31,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:21:31,307 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-14 03:21:31,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:21:31,308 INFO L225 Difference]: With dead ends: 27 [2024-11-14 03:21:31,308 INFO L226 Difference]: Without dead ends: 18 [2024-11-14 03:21:31,308 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 03:21:31,309 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 10 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:21:31,310 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:21:31,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-14 03:21:31,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-11-14 03:21:31,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:21:31,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2024-11-14 03:21:31,320 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 13 [2024-11-14 03:21:31,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:21:31,321 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2024-11-14 03:21:31,321 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:21:31,321 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2024-11-14 03:21:31,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-14 03:21:31,321 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:21:31,322 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:21:31,322 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 03:21:31,323 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:21:31,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:21:31,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1137087264, now seen corresponding path program 1 times [2024-11-14 03:21:31,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:21:31,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797350780] [2024-11-14 03:21:31,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:21:31,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:21:31,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:21:31,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:21:31,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:21:31,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797350780] [2024-11-14 03:21:31,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797350780] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:21:31,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485372895] [2024-11-14 03:21:31,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:21:31,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:21:31,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:21:31,766 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:21:31,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 03:21:31,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:21:31,924 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 03:21:31,930 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:21:32,045 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:21:32,045 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:21:32,110 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:21:32,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485372895] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:21:32,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1878597255] [2024-11-14 03:21:32,143 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 03:21:32,143 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:21:32,147 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:21:32,153 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:21:32,153 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:21:35,525 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:21:37,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1878597255] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:21:37,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:21:37,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 3, 3] total 13 [2024-11-14 03:21:37,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118611641] [2024-11-14 03:21:37,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:21:37,064 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 03:21:37,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:21:37,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 03:21:37,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=129, Unknown=1, NotChecked=0, Total=182 [2024-11-14 03:21:37,067 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:21:37,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:21:37,727 INFO L93 Difference]: Finished difference Result 35 states and 48 transitions. [2024-11-14 03:21:37,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 03:21:37,728 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-14 03:21:37,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:21:37,729 INFO L225 Difference]: With dead ends: 35 [2024-11-14 03:21:37,729 INFO L226 Difference]: Without dead ends: 25 [2024-11-14 03:21:37,731 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=58, Invalid=150, Unknown=2, NotChecked=0, Total=210 [2024-11-14 03:21:37,732 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 9 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:21:37,735 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 21 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:21:37,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-14 03:21:37,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2024-11-14 03:21:37,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:21:37,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 27 transitions. [2024-11-14 03:21:37,751 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 27 transitions. Word has length 15 [2024-11-14 03:21:37,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:21:37,752 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 27 transitions. [2024-11-14 03:21:37,752 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:21:37,752 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 27 transitions. [2024-11-14 03:21:37,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-14 03:21:37,753 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:21:37,753 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:21:37,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-14 03:21:37,957 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-14 03:21:37,961 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:21:37,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:21:37,962 INFO L85 PathProgramCache]: Analyzing trace with hash -719029011, now seen corresponding path program 1 times [2024-11-14 03:21:37,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:21:37,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178501668] [2024-11-14 03:21:37,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:21:37,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:21:37,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:21:38,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:21:38,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:21:38,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178501668] [2024-11-14 03:21:38,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178501668] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:21:38,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:21:38,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:21:38,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788939128] [2024-11-14 03:21:38,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:21:38,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:21:38,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:21:38,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:21:38,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:21:38,179 INFO L87 Difference]: Start difference. First operand 20 states and 27 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:21:38,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:21:38,258 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2024-11-14 03:21:38,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:21:38,259 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-14 03:21:38,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:21:38,260 INFO L225 Difference]: With dead ends: 37 [2024-11-14 03:21:38,260 INFO L226 Difference]: Without dead ends: 23 [2024-11-14 03:21:38,261 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:21:38,263 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:21:38,264 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 33 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:21:38,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-14 03:21:38,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2024-11-14 03:21:38,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:21:38,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2024-11-14 03:21:38,283 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 16 [2024-11-14 03:21:38,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:21:38,285 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2024-11-14 03:21:38,285 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:21:38,285 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2024-11-14 03:21:38,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-14 03:21:38,286 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:21:38,286 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:21:38,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-14 03:21:38,286 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:21:38,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:21:38,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1384539209, now seen corresponding path program 1 times [2024-11-14 03:21:38,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:21:38,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638092380] [2024-11-14 03:21:38,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:21:38,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:21:38,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:21:38,601 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 03:21:38,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:21:38,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638092380] [2024-11-14 03:21:38,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638092380] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:21:38,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885660709] [2024-11-14 03:21:38,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:21:38,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:21:38,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:21:38,605 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:21:38,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 03:21:38,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:21:38,738 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 03:21:38,740 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:21:38,780 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 03:21:38,781 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:21:38,820 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 03:21:38,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885660709] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:21:38,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [476860028] [2024-11-14 03:21:38,823 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:21:38,824 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:21:38,824 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:21:38,825 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:21:38,825 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:21:40,426 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:21:41,627 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '625#(and (<= 2 ~SIZE~0) (= |ULTIMATE.start_main_~i~1#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) |ULTIMATE.start_main_~#set~0#1.offset|) |ULTIMATE.start_main_~element~0#1|))' at error location [2024-11-14 03:21:41,627 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:21:41,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:21:41,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2024-11-14 03:21:41,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002393976] [2024-11-14 03:21:41,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:21:41,628 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-14 03:21:41,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:21:41,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-14 03:21:41,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2024-11-14 03:21:41,629 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:21:41,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:21:41,873 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2024-11-14 03:21:41,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 03:21:41,874 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-14 03:21:41,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:21:41,875 INFO L225 Difference]: With dead ends: 53 [2024-11-14 03:21:41,875 INFO L226 Difference]: Without dead ends: 34 [2024-11-14 03:21:41,875 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2024-11-14 03:21:41,876 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 8 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:21:41,876 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 20 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:21:41,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-14 03:21:41,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2024-11-14 03:21:41,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:21:41,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2024-11-14 03:21:41,888 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 19 [2024-11-14 03:21:41,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:21:41,888 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2024-11-14 03:21:41,888 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:21:41,888 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2024-11-14 03:21:41,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-14 03:21:41,889 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:21:41,889 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:21:41,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-14 03:21:42,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-14 03:21:42,090 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:21:42,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:21:42,091 INFO L85 PathProgramCache]: Analyzing trace with hash 2057739484, now seen corresponding path program 2 times [2024-11-14 03:21:42,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:21:42,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222232935] [2024-11-14 03:21:42,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:21:42,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:21:42,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:21:42,325 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 03:21:42,325 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:21:42,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222232935] [2024-11-14 03:21:42,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222232935] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:21:42,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090987143] [2024-11-14 03:21:42,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:21:42,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:21:42,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:21:42,329 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:21:42,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 03:21:42,458 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 03:21:42,458 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:21:42,460 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 03:21:42,462 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:21:42,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2024-11-14 03:21:42,696 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 03:21:42,696 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:21:42,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 26 [2024-11-14 03:21:42,902 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 03:21:42,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090987143] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:21:42,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [210933288] [2024-11-14 03:21:42,905 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:21:42,906 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:21:42,906 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:21:42,906 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:21:42,906 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:21:44,988 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:21:46,009 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '927#(and (<= 2 ~SIZE~0) (= |ULTIMATE.start_main_~i~1#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) |ULTIMATE.start_main_~#set~0#1.offset|) |ULTIMATE.start_main_~element~0#1|))' at error location [2024-11-14 03:21:46,010 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:21:46,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:21:46,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-11-14 03:21:46,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171241794] [2024-11-14 03:21:46,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:21:46,011 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-14 03:21:46,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:21:46,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-14 03:21:46,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2024-11-14 03:21:46,013 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:21:46,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:21:46,892 INFO L93 Difference]: Finished difference Result 120 states and 162 transitions. [2024-11-14 03:21:46,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-14 03:21:46,893 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-11-14 03:21:46,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:21:46,896 INFO L225 Difference]: With dead ends: 120 [2024-11-14 03:21:46,896 INFO L226 Difference]: Without dead ends: 96 [2024-11-14 03:21:46,897 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=502, Invalid=1850, Unknown=0, NotChecked=0, Total=2352 [2024-11-14 03:21:46,899 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 126 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:21:46,899 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 46 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:21:46,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-14 03:21:46,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 43. [2024-11-14 03:21:46,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 42 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:21:46,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 57 transitions. [2024-11-14 03:21:46,919 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 57 transitions. Word has length 23 [2024-11-14 03:21:46,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:21:46,919 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 57 transitions. [2024-11-14 03:21:46,919 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:21:46,920 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 57 transitions. [2024-11-14 03:21:46,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-14 03:21:46,920 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:21:46,921 INFO L215 NwaCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:21:46,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 03:21:47,121 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-14 03:21:47,121 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:21:47,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:21:47,122 INFO L85 PathProgramCache]: Analyzing trace with hash -615682208, now seen corresponding path program 1 times [2024-11-14 03:21:47,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:21:47,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197718356] [2024-11-14 03:21:47,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:21:47,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:21:47,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:21:47,497 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 03:21:47,497 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:21:47,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197718356] [2024-11-14 03:21:47,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197718356] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:21:47,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952973512] [2024-11-14 03:21:47,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:21:47,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:21:47,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:21:47,501 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:21:47,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 03:21:47,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:21:47,669 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-14 03:21:47,673 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:21:47,818 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 03:21:47,818 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:21:48,014 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 03:21:48,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952973512] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:21:48,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [187050304] [2024-11-14 03:21:48,019 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:21:48,020 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:21:48,020 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:21:48,023 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:21:48,024 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:21:48,747 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:21:49,061 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1433#(and (<= 2 ~SIZE~0) (= |ULTIMATE.start_main_~i~1#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) |ULTIMATE.start_main_~#set~0#1.offset|) |ULTIMATE.start_main_~element~0#1|))' at error location [2024-11-14 03:21:49,061 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:21:49,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:21:49,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2024-11-14 03:21:49,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094788632] [2024-11-14 03:21:49,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:21:49,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-14 03:21:49,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:21:49,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-14 03:21:49,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=864, Unknown=0, NotChecked=0, Total=1190 [2024-11-14 03:21:49,065 INFO L87 Difference]: Start difference. First operand 43 states and 57 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:21:49,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:21:49,197 INFO L93 Difference]: Finished difference Result 89 states and 126 transitions. [2024-11-14 03:21:49,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-14 03:21:49,198 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-11-14 03:21:49,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:21:49,199 INFO L225 Difference]: With dead ends: 89 [2024-11-14 03:21:49,199 INFO L226 Difference]: Without dead ends: 55 [2024-11-14 03:21:49,200 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=326, Invalid=864, Unknown=0, NotChecked=0, Total=1190 [2024-11-14 03:21:49,201 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 3 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:21:49,201 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 32 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:21:49,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-14 03:21:49,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2024-11-14 03:21:49,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 51 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:21:49,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2024-11-14 03:21:49,218 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 28 [2024-11-14 03:21:49,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:21:49,219 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2024-11-14 03:21:49,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:21:49,219 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2024-11-14 03:21:49,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-14 03:21:49,220 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:21:49,220 INFO L215 NwaCegarLoop]: trace histogram [16, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:21:49,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 03:21:49,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-14 03:21:49,421 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:21:49,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:21:49,422 INFO L85 PathProgramCache]: Analyzing trace with hash -601806198, now seen corresponding path program 2 times [2024-11-14 03:21:49,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:21:49,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195129290] [2024-11-14 03:21:49,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:21:49,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:21:49,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:21:50,339 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 03:21:50,339 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:21:50,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195129290] [2024-11-14 03:21:50,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195129290] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:21:50,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264525861] [2024-11-14 03:21:50,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:21:50,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:21:50,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:21:50,342 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:21:50,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 03:21:50,541 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 03:21:50,542 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:21:50,544 INFO L255 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 03:21:50,546 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:21:50,722 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2024-11-14 03:21:50,722 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:21:50,853 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2024-11-14 03:21:50,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264525861] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:21:50,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1115356212] [2024-11-14 03:21:50,857 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:21:50,857 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:21:50,857 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:21:50,857 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:21:50,857 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:21:52,547 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:21:53,491 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1932#(and (<= 2 ~SIZE~0) (= |ULTIMATE.start_main_~i~1#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) |ULTIMATE.start_main_~#set~0#1.offset|) |ULTIMATE.start_main_~element~0#1|))' at error location [2024-11-14 03:21:53,491 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:21:53,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:21:53,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 5, 5] total 26 [2024-11-14 03:21:53,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109225359] [2024-11-14 03:21:53,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:21:53,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-14 03:21:53,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:21:53,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-14 03:21:53,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1094, Unknown=0, NotChecked=0, Total=1332 [2024-11-14 03:21:53,495 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:21:54,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:21:54,404 INFO L93 Difference]: Finished difference Result 211 states and 264 transitions. [2024-11-14 03:21:54,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-14 03:21:54,405 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2024-11-14 03:21:54,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:21:54,406 INFO L225 Difference]: With dead ends: 211 [2024-11-14 03:21:54,410 INFO L226 Difference]: Without dead ends: 177 [2024-11-14 03:21:54,412 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=625, Invalid=2567, Unknown=0, NotChecked=0, Total=3192 [2024-11-14 03:21:54,413 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 321 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:21:54,413 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 101 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:21:54,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-11-14 03:21:54,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 81. [2024-11-14 03:21:54,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.3375) internal successors, (107), 80 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:21:54,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 107 transitions. [2024-11-14 03:21:54,469 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 107 transitions. Word has length 37 [2024-11-14 03:21:54,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:21:54,470 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 107 transitions. [2024-11-14 03:21:54,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:21:54,470 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 107 transitions. [2024-11-14 03:21:54,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-14 03:21:54,471 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:21:54,472 INFO L215 NwaCegarLoop]: trace histogram [17, 6, 6, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:21:54,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 03:21:54,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-14 03:21:54,673 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:21:54,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:21:54,673 INFO L85 PathProgramCache]: Analyzing trace with hash 288235808, now seen corresponding path program 3 times [2024-11-14 03:21:54,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:21:54,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146532007] [2024-11-14 03:21:54,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:21:54,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:21:54,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:21:55,605 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-14 03:21:55,605 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:21:55,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146532007] [2024-11-14 03:21:55,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146532007] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:21:55,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372010718] [2024-11-14 03:21:55,606 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:21:55,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:21:55,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:21:55,608 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:21:55,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 03:21:55,804 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:21:55,804 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:21:55,807 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-14 03:21:55,811 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:21:56,382 INFO L349 Elim1Store]: treesize reduction 106, result has 24.3 percent of original size [2024-11-14 03:21:56,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 56 treesize of output 68 [2024-11-14 03:22:02,899 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2024-11-14 03:22:02,899 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:22:05,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 57 [2024-11-14 03:22:05,389 INFO L349 Elim1Store]: treesize reduction 64, result has 28.1 percent of original size [2024-11-14 03:22:05,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 70 treesize of output 49 [2024-11-14 03:22:05,427 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2024-11-14 03:22:05,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372010718] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:22:05,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [651070405] [2024-11-14 03:22:05,430 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:22:05,430 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:22:05,430 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:22:05,431 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:22:05,431 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:22:07,167 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:22:07,617 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2766#(and (<= 2 ~SIZE~0) (= |ULTIMATE.start_main_~i~1#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) |ULTIMATE.start_main_~#set~0#1.offset|) |ULTIMATE.start_main_~element~0#1|))' at error location [2024-11-14 03:22:07,617 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:22:07,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:22:07,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 10] total 34 [2024-11-14 03:22:07,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892315616] [2024-11-14 03:22:07,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:22:07,618 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-14 03:22:07,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:22:07,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-14 03:22:07,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=1444, Unknown=4, NotChecked=0, Total=1722 [2024-11-14 03:22:07,620 INFO L87 Difference]: Start difference. First operand 81 states and 107 transitions. Second operand has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 34 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:22:09,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:22:11,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:22:16,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:22:20,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:22:22,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:22:24,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-14 03:22:28,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:22:30,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-14 03:22:36,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:22:42,863 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:22:44,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:22:49,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:22:57,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:22:59,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:23:02,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:23:04,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:23:06,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:23:08,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:23:08,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:23:08,228 INFO L93 Difference]: Finished difference Result 175 states and 232 transitions. [2024-11-14 03:23:08,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-14 03:23:08,229 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 34 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2024-11-14 03:23:08,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:23:08,230 INFO L225 Difference]: With dead ends: 175 [2024-11-14 03:23:08,230 INFO L226 Difference]: Without dead ends: 113 [2024-11-14 03:23:08,232 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 118 SyntacticMatches, 9 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 32.5s TimeCoverageRelationStatistics Valid=412, Invalid=2329, Unknown=15, NotChecked=0, Total=2756 [2024-11-14 03:23:08,232 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 73 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 33 mSolverCounterUnsat, 19 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 19 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:23:08,233 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 88 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 334 Invalid, 19 Unknown, 0 Unchecked, 37.6s Time] [2024-11-14 03:23:08,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-11-14 03:23:08,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 87. [2024-11-14 03:23:08,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.3255813953488371) internal successors, (114), 86 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:23:08,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 114 transitions. [2024-11-14 03:23:08,279 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 114 transitions. Word has length 50 [2024-11-14 03:23:08,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:23:08,279 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 114 transitions. [2024-11-14 03:23:08,280 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 34 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:23:08,280 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 114 transitions. [2024-11-14 03:23:08,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-14 03:23:08,281 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:23:08,282 INFO L215 NwaCegarLoop]: trace histogram [18, 6, 6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:23:08,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 03:23:08,482 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-14 03:23:08,482 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:23:08,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:23:08,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1963893348, now seen corresponding path program 1 times [2024-11-14 03:23:08,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:23:08,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177078102] [2024-11-14 03:23:08,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:23:08,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:23:08,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:23:09,501 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-14 03:23:09,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:23:09,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177078102] [2024-11-14 03:23:09,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177078102] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:23:09,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954061939] [2024-11-14 03:23:09,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:23:09,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:23:09,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:23:09,504 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:23:09,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 03:23:09,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:23:09,784 INFO L255 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-14 03:23:09,786 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:23:10,217 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-14 03:23:10,217 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:23:11,047 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-14 03:23:11,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954061939] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:23:11,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1076395784] [2024-11-14 03:23:11,050 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 03:23:11,050 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:23:11,050 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:23:11,050 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:23:11,050 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:23:12,869 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:23:13,070 WARN L873 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_insert_#in~set#1.offset_68| Int) (|v_#memory_int_159| (Array Int (Array Int Int))) (|v_ULTIMATE.start_insert_~value#1_69| Int) (|v_ULTIMATE.start_main_~n~0#1_77| Int) (|v_ULTIMATE.start_insert_~size#1_69| Int) (|v_ULTIMATE.start_insert_~set#1.base_69| Int) (|v_ULTIMATE.start_elem_exists_#res#1_82| Int) (|v_ULTIMATE.start_insert_~set#1.offset_69| Int) (|v_ULTIMATE.start_elem_exists_~size#1_101| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_68| Int) (|v_ULTIMATE.start_main_#t~mem12#1_76| Int) (|v_ULTIMATE.start_insert_#in~size#1_68| Int) (|v_ULTIMATE.start_insert_#in~value#1_68| Int) (|v_ULTIMATE.start_main_#t~ret13#1_73| Int) (|v_ULTIMATE.start_insert_#res#1_68| Int) (|v_ULTIMATE.start_elem_exists_~i~0#1_107| Int)) (let ((.cse0 (= |v_ULTIMATE.start_elem_exists_#res#1_82| 1))) (and (or (= |v_ULTIMATE.start_elem_exists_#res#1_82| 0) (and (<= 1 |v_ULTIMATE.start_elem_exists_~size#1_101|) .cse0 (= |v_ULTIMATE.start_elem_exists_~i~0#1_107| 0))) (<= |v_ULTIMATE.start_elem_exists_#res#1_82| 2147483647) (or (and (not .cse0) (<= |c_ULTIMATE.start_main_~n~0#1| 2147483647) (= |c_#memory_int| (store |v_#memory_int_159| |c_ULTIMATE.start_main_~#set~0#1.base| (store (select |v_#memory_int_159| |c_ULTIMATE.start_main_~#set~0#1.base|) (+ |c_ULTIMATE.start_main_~#set~0#1.offset| (- 4) (* |c_ULTIMATE.start_main_~n~0#1| 4)) (select (select |v_#memory_int_159| |c_ULTIMATE.start_main_~#values~0#1.base|) (+ (* |c_ULTIMATE.start_main_~v~0#1| 4) (- 4) |c_ULTIMATE.start_main_~#values~0#1.offset|))))) (<= 0 (+ |c_ULTIMATE.start_main_~n~0#1| 2147483648)) (= |c_ULTIMATE.start_main_~n~0#1| (+ |v_ULTIMATE.start_main_~n~0#1_77| 1))) (and (= |c_ULTIMATE.start_insert_#in~value#1| |v_ULTIMATE.start_insert_#in~value#1_68|) (= |c_ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~n~0#1_77|) (= |v_ULTIMATE.start_insert_~set#1.base_69| |c_ULTIMATE.start_insert_~set#1.base|) (= |c_ULTIMATE.start_main_#t~ret13#1| |v_ULTIMATE.start_main_#t~ret13#1_73|) (= |c_ULTIMATE.start_main_#t~mem12#1| |v_ULTIMATE.start_main_#t~mem12#1_76|) (= |c_#memory_int| |v_#memory_int_159|) .cse0 (= |c_ULTIMATE.start_insert_~set#1.offset| |v_ULTIMATE.start_insert_~set#1.offset_69|) (= |c_ULTIMATE.start_insert_#in~size#1| |v_ULTIMATE.start_insert_#in~size#1_68|) (= |c_ULTIMATE.start_insert_#res#1| |v_ULTIMATE.start_insert_#res#1_68|) (= |c_ULTIMATE.start_insert_#in~set#1.offset| |v_ULTIMATE.start_insert_#in~set#1.offset_68|) (= |c_ULTIMATE.start_insert_~value#1| |v_ULTIMATE.start_insert_~value#1_69|) (= |v_ULTIMATE.start_insert_#in~set#1.base_68| |c_ULTIMATE.start_insert_#in~set#1.base|) (= |v_ULTIMATE.start_insert_~size#1_69| |c_ULTIMATE.start_insert_~size#1|))) (<= 0 (+ |v_ULTIMATE.start_elem_exists_#res#1_82| 2147483648))))) (and (<= |c_ULTIMATE.start_main_~element~0#1| 2147483647) (exists ((|v_ULTIMATE.start_main_~i~1#1_223| Int)) (let ((.cse1 (= 100000 c_~SIZE~0)) (.cse2 (= |c_ULTIMATE.start_main_~found~0#1| 0)) (.cse3 (= |c_ULTIMATE.start_main_~#values~0#1.offset| 0)) (.cse4 (= |c_ULTIMATE.start_main_~n~0#1| 0)) (.cse5 (= |c_ULTIMATE.start_main_~#set~0#1.offset| 0))) (and (or (and .cse1 .cse2 (= 1 |v_ULTIMATE.start_main_~i~1#1_223|) .cse3 .cse4 .cse5) (and .cse1 .cse2 .cse3 .cse4 .cse5)) (let ((.cse6 (<= 2 |c_ULTIMATE.start_main_~#values~0#1.base|)) (.cse7 (<= 2 |c_ULTIMATE.start_main_~#set~0#1.base|)) (.cse8 (<= 1 |c_#StackHeapBarrier|))) (or (and .cse1 .cse6 .cse7 .cse8 .cse2 (<= 0 |v_ULTIMATE.start_main_~i~1#1_223|) .cse3 .cse4 .cse5) (and .cse1 .cse6 .cse7 .cse8 .cse2 .cse3 .cse4 .cse5 (<= 1 |v_ULTIMATE.start_main_~i~1#1_223|)))) (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~1#1_223|)))) (<= 0 (+ |c_ULTIMATE.start_main_~element~0#1| 2147483648)) (= |c_ULTIMATE.start_main_~v~0#1| 0))) is different from true [2024-11-14 03:23:13,320 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3605#(and (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 2 ~SIZE~0))' at error location [2024-11-14 03:23:13,321 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:23:13,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:23:13,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 58 [2024-11-14 03:23:13,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138867883] [2024-11-14 03:23:13,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:23:13,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-11-14 03:23:13,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:23:13,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-11-14 03:23:13,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1570, Invalid=2989, Unknown=1, NotChecked=132, Total=4692 [2024-11-14 03:23:13,326 INFO L87 Difference]: Start difference. First operand 87 states and 114 transitions. Second operand has 59 states, 59 states have (on average 1.305084745762712) internal successors, (77), 58 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:23:13,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:23:13,622 INFO L93 Difference]: Finished difference Result 176 states and 250 transitions. [2024-11-14 03:23:13,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-14 03:23:13,622 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.305084745762712) internal successors, (77), 58 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2024-11-14 03:23:13,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:23:13,624 INFO L225 Difference]: With dead ends: 176 [2024-11-14 03:23:13,624 INFO L226 Difference]: Without dead ends: 109 [2024-11-14 03:23:13,629 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 107 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2347 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1570, Invalid=2989, Unknown=1, NotChecked=132, Total=4692 [2024-11-14 03:23:13,629 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 3 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:23:13,630 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 47 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:23:13,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-11-14 03:23:13,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2024-11-14 03:23:13,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.2641509433962264) internal successors, (134), 106 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:23:13,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 134 transitions. [2024-11-14 03:23:13,715 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 134 transitions. Word has length 54 [2024-11-14 03:23:13,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:23:13,716 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 134 transitions. [2024-11-14 03:23:13,716 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.305084745762712) internal successors, (77), 58 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:23:13,716 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 134 transitions. [2024-11-14 03:23:13,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-14 03:23:13,718 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:23:13,718 INFO L215 NwaCegarLoop]: trace histogram [38, 6, 6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:23:13,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 03:23:13,919 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-14 03:23:13,919 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:23:13,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:23:13,920 INFO L85 PathProgramCache]: Analyzing trace with hash 332325404, now seen corresponding path program 2 times [2024-11-14 03:23:13,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:23:13,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281111027] [2024-11-14 03:23:13,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:23:13,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:23:14,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:23:16,552 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-14 03:23:16,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:23:16,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281111027] [2024-11-14 03:23:16,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281111027] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:23:16,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376205333] [2024-11-14 03:23:16,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:23:16,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:23:16,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:23:16,557 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:23:16,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 03:23:16,823 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 03:23:16,823 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:23:16,824 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-14 03:23:16,827 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:23:16,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2024-11-14 03:23:17,045 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 794 trivial. 0 not checked. [2024-11-14 03:23:17,045 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:23:17,401 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 794 trivial. 0 not checked. [2024-11-14 03:23:17,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376205333] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:23:17,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1294032123] [2024-11-14 03:23:17,403 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 03:23:17,403 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:23:17,403 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:23:17,403 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:23:17,403 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:23:18,995 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:23:19,346 WARN L873 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_insert_#in~set#1.offset_78| Int) (|v_ULTIMATE.start_main_~n~0#1_87| Int) (|v_ULTIMATE.start_elem_exists_#res#1_98| Int) (|v_ULTIMATE.start_insert_~value#1_79| Int) (|v_ULTIMATE.start_insert_~set#1.base_79| Int) (|v_ULTIMATE.start_insert_~size#1_79| Int) (|v_ULTIMATE.start_elem_exists_~i~0#1_126| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_78| Int) (|v_ULTIMATE.start_elem_exists_~size#1_120| Int) (|v_ULTIMATE.start_insert_#in~size#1_78| Int) (|v_ULTIMATE.start_main_#t~mem12#1_86| Int) (|v_ULTIMATE.start_insert_#in~value#1_78| Int) (|v_ULTIMATE.start_main_#t~ret13#1_83| Int) (|v_#memory_int_212| (Array Int (Array Int Int))) (|v_ULTIMATE.start_insert_#res#1_78| Int) (|v_ULTIMATE.start_insert_~set#1.offset_79| Int)) (let ((.cse0 (= |v_ULTIMATE.start_elem_exists_#res#1_98| 1))) (and (or (and .cse0 (<= 1 |v_ULTIMATE.start_elem_exists_~size#1_120|) (= |v_ULTIMATE.start_elem_exists_~i~0#1_126| 0)) (= |v_ULTIMATE.start_elem_exists_#res#1_98| 0)) (or (and (<= |c_ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |c_ULTIMATE.start_main_~n~0#1| 2147483648)) (= (store |v_#memory_int_212| |c_ULTIMATE.start_main_~#set~0#1.base| (store (select |v_#memory_int_212| |c_ULTIMATE.start_main_~#set~0#1.base|) (+ |c_ULTIMATE.start_main_~#set~0#1.offset| (- 4) (* |c_ULTIMATE.start_main_~n~0#1| 4)) (select (select |v_#memory_int_212| |c_ULTIMATE.start_main_~#values~0#1.base|) (+ (* |c_ULTIMATE.start_main_~v~0#1| 4) (- 4) |c_ULTIMATE.start_main_~#values~0#1.offset|)))) |c_#memory_int|) (not .cse0) (= |c_ULTIMATE.start_main_~n~0#1| (+ |v_ULTIMATE.start_main_~n~0#1_87| 1))) (and (= |v_ULTIMATE.start_insert_~size#1_79| |c_ULTIMATE.start_insert_~size#1|) (= |v_ULTIMATE.start_insert_#in~set#1.base_78| |c_ULTIMATE.start_insert_#in~set#1.base|) (= |c_ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~n~0#1_87|) (= |c_ULTIMATE.start_insert_~set#1.offset| |v_ULTIMATE.start_insert_~set#1.offset_79|) (= |c_ULTIMATE.start_insert_~value#1| |v_ULTIMATE.start_insert_~value#1_79|) .cse0 (= |c_#memory_int| |v_#memory_int_212|) (= |c_ULTIMATE.start_insert_#in~value#1| |v_ULTIMATE.start_insert_#in~value#1_78|) (= |c_ULTIMATE.start_main_#t~ret13#1| |v_ULTIMATE.start_main_#t~ret13#1_83|) (= |v_ULTIMATE.start_insert_~set#1.base_79| |c_ULTIMATE.start_insert_~set#1.base|) (= |c_ULTIMATE.start_insert_#in~size#1| |v_ULTIMATE.start_insert_#in~size#1_78|) (= |c_ULTIMATE.start_insert_#res#1| |v_ULTIMATE.start_insert_#res#1_78|) (= |c_ULTIMATE.start_main_#t~mem12#1| |v_ULTIMATE.start_main_#t~mem12#1_86|) (= |c_ULTIMATE.start_insert_#in~set#1.offset| |v_ULTIMATE.start_insert_#in~set#1.offset_78|))) (<= 0 (+ |v_ULTIMATE.start_elem_exists_#res#1_98| 2147483648)) (<= |v_ULTIMATE.start_elem_exists_#res#1_98| 2147483647)))) (and (<= |c_ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ |c_ULTIMATE.start_main_~element~0#1| 2147483648)) (exists ((|v_ULTIMATE.start_main_~i~1#1_287| Int)) (let ((.cse1 (= 100000 c_~SIZE~0)) (.cse2 (= |c_ULTIMATE.start_main_~found~0#1| 0)) (.cse3 (= |c_ULTIMATE.start_main_~#values~0#1.offset| 0)) (.cse4 (= |c_ULTIMATE.start_main_~n~0#1| 0)) (.cse5 (= |c_ULTIMATE.start_main_~#set~0#1.offset| 0))) (and (or (and .cse1 .cse2 .cse3 .cse4 .cse5 (= 1 |v_ULTIMATE.start_main_~i~1#1_287|)) (and .cse1 .cse2 .cse3 .cse4 .cse5)) (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~1#1_287|) (let ((.cse6 (<= 2 |c_ULTIMATE.start_main_~#values~0#1.base|)) (.cse7 (<= 2 |c_ULTIMATE.start_main_~#set~0#1.base|)) (.cse8 (<= 1 |c_#StackHeapBarrier|))) (or (and .cse1 .cse6 .cse7 .cse8 .cse2 (<= 0 |v_ULTIMATE.start_main_~i~1#1_287|) .cse3 .cse4 .cse5) (and .cse1 .cse6 .cse7 .cse8 .cse2 (<= 1 |v_ULTIMATE.start_main_~i~1#1_287|) .cse3 .cse4 .cse5)))))) (= |c_ULTIMATE.start_main_~v~0#1| 0))) is different from true [2024-11-14 03:23:19,666 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4595#(and (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 2 ~SIZE~0))' at error location [2024-11-14 03:23:19,666 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:23:19,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:23:19,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 7, 7] total 52 [2024-11-14 03:23:19,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178016105] [2024-11-14 03:23:19,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:23:19,667 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-14 03:23:19,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:23:19,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-14 03:23:19,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1224, Invalid=2561, Unknown=1, NotChecked=120, Total=3906 [2024-11-14 03:23:19,670 INFO L87 Difference]: Start difference. First operand 107 states and 134 transitions. Second operand has 53 states, 53 states have (on average 1.679245283018868) internal successors, (89), 52 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:23:28,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:23:28,585 INFO L93 Difference]: Finished difference Result 503 states and 671 transitions. [2024-11-14 03:23:28,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2024-11-14 03:23:28,586 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.679245283018868) internal successors, (89), 52 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2024-11-14 03:23:28,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:23:28,589 INFO L225 Difference]: With dead ends: 503 [2024-11-14 03:23:28,589 INFO L226 Difference]: Without dead ends: 436 [2024-11-14 03:23:28,595 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 195 SyntacticMatches, 4 SemanticMatches, 183 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 9553 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=9631, Invalid=24044, Unknown=1, NotChecked=364, Total=34040 [2024-11-14 03:23:28,596 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 1278 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1278 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 03:23:28,596 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1278 Valid, 163 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 03:23:28,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2024-11-14 03:23:28,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 223. [2024-11-14 03:23:28,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.2837837837837838) internal successors, (285), 222 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:23:28,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 285 transitions. [2024-11-14 03:23:28,772 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 285 transitions. Word has length 74 [2024-11-14 03:23:28,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:23:28,773 INFO L471 AbstractCegarLoop]: Abstraction has 223 states and 285 transitions. [2024-11-14 03:23:28,773 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.679245283018868) internal successors, (89), 52 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:23:28,773 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 285 transitions. [2024-11-14 03:23:28,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-14 03:23:28,775 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:23:28,775 INFO L215 NwaCegarLoop]: trace histogram [43, 6, 6, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:23:28,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-14 03:23:28,976 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-14 03:23:28,976 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:23:28,977 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:23:28,977 INFO L85 PathProgramCache]: Analyzing trace with hash 883892660, now seen corresponding path program 3 times [2024-11-14 03:23:28,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:23:28,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416023033] [2024-11-14 03:23:28,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:23:28,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:23:29,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:23:32,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-14 03:23:32,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:23:32,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416023033] [2024-11-14 03:23:32,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416023033] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:23:32,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15087003] [2024-11-14 03:23:32,252 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:23:32,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:23:32,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:23:32,254 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:23:32,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75676f10-63b7-4838-b2db-081b5bd58046/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 03:23:32,577 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:23:32,577 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:23:32,580 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-14 03:23:32,585 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:23:33,410 INFO L349 Elim1Store]: treesize reduction 106, result has 25.4 percent of original size [2024-11-14 03:23:33,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 58 treesize of output 70 [2024-11-14 03:23:34,336 INFO L349 Elim1Store]: treesize reduction 314, result has 43.4 percent of original size [2024-11-14 03:23:34,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 44 case distinctions, treesize of input 142 treesize of output 317 [2024-11-14 03:25:03,821 WARN L286 SmtUtils]: Spent 7.31s on a formula simplification. DAG size of input: 1058 DAG size of output: 1067 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-14 03:25:46,450 WARN L286 SmtUtils]: Spent 5.84s on a formula simplification that was a NOOP. DAG size: 1974 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-14 03:27:37,700 WARN L286 SmtUtils]: Spent 52.03s on a formula simplification. DAG size of input: 1980 DAG size of output: 1950 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 03:33:00,242 WARN L286 SmtUtils]: Spent 33.42s on a formula simplification that was a NOOP. DAG size: 1953 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)