./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursified_nla-digbench/recursified_fermat1-ll.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_ee79503f-e1bf-491b-a233-14860f2fc90c/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/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_ee79503f-e1bf-491b-a233-14860f2fc90c/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_fermat1-ll.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/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_ee79503f-e1bf-491b-a233-14860f2fc90c/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 82b98e74657ce84706a43470df686c21fc227d1db1df507636ad5f146dee0144 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 03:40:12,135 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 03:40:12,221 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 03:40:12,228 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 03:40:12,228 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 03:40:12,261 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 03:40:12,262 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 03:40:12,262 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 03:40:12,262 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 03:40:12,262 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 03:40:12,262 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 03:40:12,262 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 03:40:12,262 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 03:40:12,263 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 03:40:12,263 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 03:40:12,263 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 03:40:12,263 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 03:40:12,265 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 03:40:12,265 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 03:40:12,265 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 03:40:12,265 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 03:40:12,266 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 03:40:12,266 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 03:40:12,266 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 03:40:12,266 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 03:40:12,266 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 03:40:12,266 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 03:40:12,266 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 03:40:12,266 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 03:40:12,267 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 03:40:12,267 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 03:40:12,267 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 03:40:12,267 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 03:40:12,267 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 03:40:12,267 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 03:40:12,267 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 03:40:12,267 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 03:40:12,267 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 03:40:12,267 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:40:12,268 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 03:40:12,268 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 03:40:12,268 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 03:40:12,268 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 03:40:12,268 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 03:40:12,268 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 03:40:12,268 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 03:40:12,268 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 03:40:12,268 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_ee79503f-e1bf-491b-a233-14860f2fc90c/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 -> 82b98e74657ce84706a43470df686c21fc227d1db1df507636ad5f146dee0144 [2024-11-14 03:40:12,573 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 03:40:12,583 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 03:40:12,589 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 03:40:12,591 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 03:40:12,591 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 03:40:12,593 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/recursified_nla-digbench/recursified_fermat1-ll.c Unable to find full path for "g++" [2024-11-14 03:40:14,445 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 03:40:14,719 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 03:40:14,722 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/sv-benchmarks/c/recursified_nla-digbench/recursified_fermat1-ll.c [2024-11-14 03:40:14,733 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/bin/utaipan-verify-sOmjnqqW8E/data/5b7cc98f3/c81a9cc928de4eb486df8a10dde8210b/FLAG549262370 [2024-11-14 03:40:15,015 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/bin/utaipan-verify-sOmjnqqW8E/data/5b7cc98f3/c81a9cc928de4eb486df8a10dde8210b [2024-11-14 03:40:15,020 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 03:40:15,022 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 03:40:15,023 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 03:40:15,023 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 03:40:15,029 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 03:40:15,030 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:40:15" (1/1) ... [2024-11-14 03:40:15,031 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@320f6587 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:40:15, skipping insertion in model container [2024-11-14 03:40:15,033 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:40:15" (1/1) ... [2024-11-14 03:40:15,052 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 03:40:15,221 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_ee79503f-e1bf-491b-a233-14860f2fc90c/sv-benchmarks/c/recursified_nla-digbench/recursified_fermat1-ll.c[1101,1114] [2024-11-14 03:40:15,254 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:40:15,264 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 03:40:15,274 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_ee79503f-e1bf-491b-a233-14860f2fc90c/sv-benchmarks/c/recursified_nla-digbench/recursified_fermat1-ll.c[1101,1114] [2024-11-14 03:40:15,290 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:40:15,310 INFO L204 MainTranslator]: Completed translation [2024-11-14 03:40:15,310 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:40:15 WrapperNode [2024-11-14 03:40:15,311 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 03:40:15,312 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 03:40:15,312 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 03:40:15,312 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 03:40:15,325 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:40:15" (1/1) ... [2024-11-14 03:40:15,333 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:40:15" (1/1) ... [2024-11-14 03:40:15,354 INFO L138 Inliner]: procedures = 18, calls = 82, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2024-11-14 03:40:15,354 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 03:40:15,355 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 03:40:15,355 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 03:40:15,355 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 03:40:15,361 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:40:15" (1/1) ... [2024-11-14 03:40:15,361 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:40:15" (1/1) ... [2024-11-14 03:40:15,364 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:40:15" (1/1) ... [2024-11-14 03:40:15,364 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:40:15" (1/1) ... [2024-11-14 03:40:15,371 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:40:15" (1/1) ... [2024-11-14 03:40:15,373 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:40:15" (1/1) ... [2024-11-14 03:40:15,375 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:40:15" (1/1) ... [2024-11-14 03:40:15,376 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:40:15" (1/1) ... [2024-11-14 03:40:15,378 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 03:40:15,379 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 03:40:15,379 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 03:40:15,379 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 03:40:15,380 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:40:15" (1/1) ... [2024-11-14 03:40:15,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:40:15,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:40:15,416 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 03:40:15,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 03:40:15,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 03:40:15,445 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_33_to_36_0 [2024-11-14 03:40:15,445 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_33_to_36_0 [2024-11-14 03:40:15,445 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-14 03:40:15,446 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-14 03:40:15,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 03:40:15,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-14 03:40:15,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-14 03:40:15,446 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_38_to_43_0 [2024-11-14 03:40:15,446 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_38_to_43_0 [2024-11-14 03:40:15,446 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_46_to_51_0 [2024-11-14 03:40:15,446 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_46_to_51_0 [2024-11-14 03:40:15,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 03:40:15,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 03:40:15,447 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-14 03:40:15,447 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-14 03:40:15,447 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-14 03:40:15,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 03:40:15,563 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 03:40:15,565 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 03:40:15,833 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-11-14 03:40:15,833 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 03:40:15,865 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 03:40:15,867 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-14 03:40:15,867 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:40:15 BoogieIcfgContainer [2024-11-14 03:40:15,867 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 03:40:15,869 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 03:40:15,869 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 03:40:15,874 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 03:40:15,875 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 03:40:15" (1/3) ... [2024-11-14 03:40:15,875 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2070e24c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:40:15, skipping insertion in model container [2024-11-14 03:40:15,876 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:40:15" (2/3) ... [2024-11-14 03:40:15,876 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2070e24c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:40:15, skipping insertion in model container [2024-11-14 03:40:15,876 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:40:15" (3/3) ... [2024-11-14 03:40:15,877 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_fermat1-ll.c [2024-11-14 03:40:15,892 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 03:40:15,896 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG recursified_fermat1-ll.c that has 6 procedures, 44 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2024-11-14 03:40:15,958 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 03:40:15,972 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;@1be92756, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 03:40:15,974 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 03:40:15,978 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 25 states have (on average 1.32) internal successors, (33), 29 states have internal predecessors, (33), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-14 03:40:15,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-14 03:40:15,986 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:40:15,986 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:40:15,987 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:40:15,990 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:40:15,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1940751987, now seen corresponding path program 1 times [2024-11-14 03:40:16,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:40:16,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783581992] [2024-11-14 03:40:16,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:40:16,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:40:16,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:40:16,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2063080901] [2024-11-14 03:40:16,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:40:16,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:40:16,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:40:16,276 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:40:16,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 03:40:16,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:40:16,490 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-11-14 03:40:16,498 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:40:16,609 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-11-14 03:40:16,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2024-11-14 03:40:16,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-14 03:40:16,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:40:16,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:40:16,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 37 [2024-11-14 03:40:17,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 41 [2024-11-14 03:40:17,712 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 03:40:17,715 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:40:17,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:40:17,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783581992] [2024-11-14 03:40:17,716 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:40:17,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063080901] [2024-11-14 03:40:17,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063080901] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:40:17,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:40:17,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-14 03:40:17,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698379540] [2024-11-14 03:40:17,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:40:17,724 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-14 03:40:17,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:40:17,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-14 03:40:17,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-14 03:40:17,749 INFO L87 Difference]: Start difference. First operand has 44 states, 25 states have (on average 1.32) internal successors, (33), 29 states have internal predecessors, (33), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 9 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 03:40:18,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:40:18,749 INFO L93 Difference]: Finished difference Result 93 states and 133 transitions. [2024-11-14 03:40:18,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 03:40:18,752 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2024-11-14 03:40:18,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:40:18,759 INFO L225 Difference]: With dead ends: 93 [2024-11-14 03:40:18,759 INFO L226 Difference]: Without dead ends: 55 [2024-11-14 03:40:18,762 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-14 03:40:18,765 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 14 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:40:18,765 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 285 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 03:40:18,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-14 03:40:18,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2024-11-14 03:40:18,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 32 states have (on average 1.15625) internal successors, (37), 36 states have internal predecessors, (37), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2024-11-14 03:40:18,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2024-11-14 03:40:18,822 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 16 [2024-11-14 03:40:18,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:40:18,823 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2024-11-14 03:40:18,823 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 03:40:18,823 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2024-11-14 03:40:18,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-14 03:40:18,825 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:40:18,826 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:40:18,849 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 03:40:19,030 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:40:19,031 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:40:19,031 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:40:19,031 INFO L85 PathProgramCache]: Analyzing trace with hash -971249846, now seen corresponding path program 1 times [2024-11-14 03:40:19,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:40:19,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546982570] [2024-11-14 03:40:19,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:40:19,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:40:19,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:40:19,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2022412348] [2024-11-14 03:40:19,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:40:19,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:40:19,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:40:19,177 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:40:19,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 03:40:19,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:40:19,397 WARN L253 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 117 conjuncts are in the unsatisfiable core [2024-11-14 03:40:19,405 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:40:19,438 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-11-14 03:40:19,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2024-11-14 03:40:19,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-14 03:40:19,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:40:19,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:40:19,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 37 [2024-11-14 03:40:21,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 45 [2024-11-14 03:40:21,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:40:21,322 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:40:51,418 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:40:51,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546982570] [2024-11-14 03:40:51,418 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:40:51,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022412348] [2024-11-14 03:40:51,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022412348] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:40:51,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1431391096] [2024-11-14 03:40:51,443 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-14 03:40:51,443 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:40:51,447 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:40:51,452 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:40:51,453 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:40:52,240 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 172 for LOIs [2024-11-14 03:40:52,349 INFO L197 IcfgInterpreter]: Interpreting procedure func_to_recursive_line_33_to_36_0 with input of size 122 for LOIs [2024-11-14 03:40:53,170 INFO L197 IcfgInterpreter]: Interpreting procedure func_to_recursive_line_38_to_43_0 with input of size 141 for LOIs [2024-11-14 03:40:53,428 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 230 for LOIs [2024-11-14 03:40:54,542 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:42:27,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1431391096] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:42:27,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:42:27,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [12] total 31 [2024-11-14 03:42:27,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986446878] [2024-11-14 03:42:27,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:42:27,985 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-14 03:42:27,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:42:27,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-14 03:42:27,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1370, Unknown=25, NotChecked=0, Total=1560 [2024-11-14 03:42:27,987 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 6 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 03:42:39,250 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 03:42:47,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 03:42:50,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 03:42:52,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:42:52,560 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2024-11-14 03:42:52,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-14 03:42:52,562 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 6 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2024-11-14 03:42:52,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:42:52,563 INFO L225 Difference]: With dead ends: 69 [2024-11-14 03:42:52,564 INFO L226 Difference]: Without dead ends: 67 [2024-11-14 03:42:52,565 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 123.9s TimeCoverageRelationStatistics Valid=165, Invalid=1370, Unknown=25, NotChecked=0, Total=1560 [2024-11-14 03:42:52,565 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 9 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 3 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:42:52,566 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 216 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 459 Invalid, 6 Unknown, 0 Unchecked, 24.5s Time] [2024-11-14 03:42:52,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-14 03:42:52,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2024-11-14 03:42:52,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 40 states have (on average 1.15) internal successors, (46), 45 states have internal predecessors, (46), 15 states have call successors, (15), 9 states have call predecessors, (15), 9 states have return successors, (16), 13 states have call predecessors, (16), 14 states have call successors, (16) [2024-11-14 03:42:52,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2024-11-14 03:42:52,591 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 26 [2024-11-14 03:42:52,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:42:52,592 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2024-11-14 03:42:52,592 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 6 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 03:42:52,592 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2024-11-14 03:42:52,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-14 03:42:52,592 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:42:52,593 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:42:52,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-14 03:42:52,793 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:42:52,793 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:42:52,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:42:52,794 INFO L85 PathProgramCache]: Analyzing trace with hash -169293736, now seen corresponding path program 1 times [2024-11-14 03:42:52,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:42:52,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703436326] [2024-11-14 03:42:52,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:42:52,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:42:52,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:42:52,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [25035410] [2024-11-14 03:42:52,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:42:52,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:42:52,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:42:52,862 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:42:52,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 03:42:53,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:42:53,012 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-14 03:42:53,016 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:42:53,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-14 03:42:53,059 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-11-14 03:42:53,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2024-11-14 03:42:53,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:42:53,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:42:53,688 INFO L349 Elim1Store]: treesize reduction 78, result has 24.3 percent of original size [2024-11-14 03:42:53,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 125 treesize of output 89 [2024-11-14 03:42:55,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 57 [2024-11-14 03:42:56,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:42:56,612 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:42:56,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:42:56,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703436326] [2024-11-14 03:42:56,613 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:42:56,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25035410] [2024-11-14 03:42:56,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25035410] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:42:56,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:42:56,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2024-11-14 03:42:56,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350040286] [2024-11-14 03:42:56,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:42:56,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-14 03:42:56,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:42:56,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-14 03:42:56,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=260, Unknown=1, NotChecked=0, Total=306 [2024-11-14 03:42:56,615 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand has 18 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-14 03:43:00,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 03:43:08,523 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.53s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 03:43:12,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 03:43:14,863 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 03:43:19,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 03:43:22,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 03:43:25,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 03:43:28,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 03:43:30,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:43:30,371 INFO L93 Difference]: Finished difference Result 81 states and 99 transitions. [2024-11-14 03:43:30,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-14 03:43:30,371 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 26 [2024-11-14 03:43:30,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:43:30,373 INFO L225 Difference]: With dead ends: 81 [2024-11-14 03:43:30,373 INFO L226 Difference]: Without dead ends: 71 [2024-11-14 03:43:30,373 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=111, Invalid=753, Unknown=6, NotChecked=0, Total=870 [2024-11-14 03:43:30,374 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 33 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 28 mSolverCounterUnsat, 27 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 27 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:43:30,374 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 219 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 559 Invalid, 27 Unknown, 0 Unchecked, 29.9s Time] [2024-11-14 03:43:30,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-14 03:43:30,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2024-11-14 03:43:30,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 42 states have (on average 1.119047619047619) internal successors, (47), 46 states have internal predecessors, (47), 17 states have call successors, (17), 9 states have call predecessors, (17), 11 states have return successors, (24), 16 states have call predecessors, (24), 16 states have call successors, (24) [2024-11-14 03:43:30,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2024-11-14 03:43:30,403 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 26 [2024-11-14 03:43:30,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:43:30,403 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2024-11-14 03:43:30,403 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-14 03:43:30,403 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2024-11-14 03:43:30,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-14 03:43:30,404 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:43:30,404 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:43:30,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-14 03:43:30,605 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:43:30,605 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:43:30,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:43:30,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1614725153, now seen corresponding path program 1 times [2024-11-14 03:43:30,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:43:30,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196667288] [2024-11-14 03:43:30,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:43:30,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:43:30,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:43:30,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [371832738] [2024-11-14 03:43:30,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:43:30,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:43:30,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:43:30,766 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:43:30,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 03:43:31,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:43:31,012 WARN L253 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 163 conjuncts are in the unsatisfiable core [2024-11-14 03:43:31,017 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:43:31,039 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-11-14 03:43:31,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2024-11-14 03:43:31,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-14 03:43:31,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:43:31,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:43:31,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 48 [2024-11-14 03:43:34,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:43:34,847 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2024-11-14 03:43:34,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 135 treesize of output 82 [2024-11-14 03:43:35,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 50 [2024-11-14 03:43:35,787 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:43:35,788 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:44:29,997 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:44:29,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196667288] [2024-11-14 03:44:29,998 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:44:29,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371832738] [2024-11-14 03:44:29,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371832738] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:44:29,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2122922186] [2024-11-14 03:44:30,000 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-14 03:44:30,000 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:44:30,001 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:276) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-14 03:44:30,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:44:30,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-11-14 03:44:30,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231456866] [2024-11-14 03:44:30,004 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-14 03:44:30,004 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-14 03:44:30,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:44:30,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-14 03:44:30,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=991, Unknown=18, NotChecked=0, Total=1122 [2024-11-14 03:44:30,006 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 21 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 8 states have call successors, (8), 8 states have call predecessors, (8), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-14 03:44:37,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 03:44:40,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 03:44:42,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 03:44:56,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 03:44:58,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-11-14 03:45:00,987 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 03:45:07,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 03:45:09,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 03:45:12,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-11-14 03:45:14,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 03:45:16,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 03:45:18,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 03:45:21,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 03:45:22,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 03:45:24,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 03:45:26,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 03:45:28,417 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 03:45:30,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 03:45:33,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 03:45:34,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 03:45:36,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 03:45:40,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 03:45:42,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 03:45:44,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 03:45:47,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 03:45:50,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 03:45:50,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:45:50,381 INFO L93 Difference]: Finished difference Result 160 states and 208 transitions. [2024-11-14 03:45:50,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-14 03:45:50,382 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 8 states have call successors, (8), 8 states have call predecessors, (8), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2024-11-14 03:45:50,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:45:50,384 INFO L225 Difference]: With dead ends: 160 [2024-11-14 03:45:50,384 INFO L226 Difference]: Without dead ends: 156 [2024-11-14 03:45:50,385 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 78.6s TimeCoverageRelationStatistics Valid=223, Invalid=1827, Unknown=20, NotChecked=0, Total=2070 [2024-11-14 03:45:50,386 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 117 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 30 mSolverCounterUnsat, 20 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 57.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 20 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 58.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:45:50,386 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 423 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 710 Invalid, 20 Unknown, 0 Unchecked, 58.1s Time] [2024-11-14 03:45:50,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2024-11-14 03:45:50,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 151. [2024-11-14 03:45:50,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 90 states have (on average 1.1444444444444444) internal successors, (103), 98 states have internal predecessors, (103), 36 states have call successors, (36), 19 states have call predecessors, (36), 24 states have return successors, (58), 35 states have call predecessors, (58), 34 states have call successors, (58) [2024-11-14 03:45:50,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 197 transitions. [2024-11-14 03:45:50,461 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 197 transitions. Word has length 36 [2024-11-14 03:45:50,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:45:50,462 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 197 transitions. [2024-11-14 03:45:50,462 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 8 states have call successors, (8), 8 states have call predecessors, (8), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-14 03:45:50,462 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 197 transitions. [2024-11-14 03:45:50,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-14 03:45:50,463 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:45:50,463 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:45:50,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 03:45:50,663 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:45:50,664 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:45:50,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:45:50,664 INFO L85 PathProgramCache]: Analyzing trace with hash -730228997, now seen corresponding path program 1 times [2024-11-14 03:45:50,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:45:50,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280244901] [2024-11-14 03:45:50,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:45:50,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:45:50,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:45:50,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1633530615] [2024-11-14 03:45:50,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:45:50,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:45:50,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:45:50,777 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:45:50,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 03:45:51,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:45:51,013 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 124 conjuncts are in the unsatisfiable core [2024-11-14 03:45:51,017 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:45:51,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-14 03:45:51,032 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-11-14 03:45:51,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2024-11-14 03:45:51,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:45:51,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:45:51,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 37 [2024-11-14 03:45:52,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 45 [2024-11-14 03:45:52,556 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:45:52,556 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:45:58,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:45:58,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280244901] [2024-11-14 03:45:58,181 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:45:58,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633530615] [2024-11-14 03:45:58,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633530615] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:45:58,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [999881358] [2024-11-14 03:45:58,184 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2024-11-14 03:45:58,184 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:45:58,184 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:45:58,185 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:45:58,185 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:45:58,632 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 172 for LOIs [2024-11-14 03:45:58,697 INFO L197 IcfgInterpreter]: Interpreting procedure func_to_recursive_line_33_to_36_0 with input of size 122 for LOIs [2024-11-14 03:45:59,726 INFO L197 IcfgInterpreter]: Interpreting procedure func_to_recursive_line_46_to_51_0 with input of size 157 for LOIs [2024-11-14 03:46:00,037 INFO L197 IcfgInterpreter]: Interpreting procedure func_to_recursive_line_38_to_43_0 with input of size 141 for LOIs [2024-11-14 03:46:00,568 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-14 03:46:00,576 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:47:11,799 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1939#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 03:47:11,799 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:47:11,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:47:11,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2024-11-14 03:47:11,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773227382] [2024-11-14 03:47:11,799 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-14 03:47:11,800 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-14 03:47:11,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:47:11,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-14 03:47:11,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1682, Unknown=13, NotChecked=0, Total=1892 [2024-11-14 03:47:11,801 INFO L87 Difference]: Start difference. First operand 151 states and 197 transitions. Second operand has 14 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (8), 6 states have call predecessors, (8), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-14 03:47:33,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 03:47:36,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-11-14 03:47:39,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 03:47:41,628 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-11-14 03:47:42,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:47:42,307 INFO L93 Difference]: Finished difference Result 159 states and 203 transitions. [2024-11-14 03:47:42,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-14 03:47:42,307 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (8), 6 states have call predecessors, (8), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2024-11-14 03:47:42,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:47:42,310 INFO L225 Difference]: With dead ends: 159 [2024-11-14 03:47:42,310 INFO L226 Difference]: Without dead ends: 157 [2024-11-14 03:47:42,311 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 98.0s TimeCoverageRelationStatistics Valid=292, Invalid=2445, Unknown=19, NotChecked=0, Total=2756 [2024-11-14 03:47:42,312 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 60 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 40 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:47:42,314 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 171 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 370 Invalid, 10 Unknown, 0 Unchecked, 9.6s Time] [2024-11-14 03:47:42,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-11-14 03:47:42,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 155. [2024-11-14 03:47:42,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 93 states have (on average 1.1397849462365592) internal successors, (106), 101 states have internal predecessors, (106), 36 states have call successors, (36), 20 states have call predecessors, (36), 25 states have return successors, (58), 35 states have call predecessors, (58), 34 states have call successors, (58) [2024-11-14 03:47:42,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 200 transitions. [2024-11-14 03:47:42,378 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 200 transitions. Word has length 38 [2024-11-14 03:47:42,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:47:42,378 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 200 transitions. [2024-11-14 03:47:42,378 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (8), 6 states have call predecessors, (8), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-14 03:47:42,378 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 200 transitions. [2024-11-14 03:47:42,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-14 03:47:42,379 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:47:42,380 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:47:42,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-14 03:47:42,580 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:47:42,580 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:47:42,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:47:42,581 INFO L85 PathProgramCache]: Analyzing trace with hash 986036280, now seen corresponding path program 2 times [2024-11-14 03:47:42,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:47:42,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329793172] [2024-11-14 03:47:42,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:47:42,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:47:42,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:47:42,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1215379388] [2024-11-14 03:47:42,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:47:42,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:47:42,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:47:42,709 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:47:42,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 03:47:44,253 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-14 03:47:44,253 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:47:44,258 WARN L253 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 203 conjuncts are in the unsatisfiable core [2024-11-14 03:47:44,264 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:47:44,278 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-14 03:47:44,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2024-11-14 03:47:44,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 43 [2024-11-14 03:47:44,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:47:44,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2024-11-14 03:47:44,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-14 03:47:45,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:47:45,818 INFO L349 Elim1Store]: treesize reduction 67, result has 31.6 percent of original size [2024-11-14 03:47:45,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 96 treesize of output 85 [2024-11-14 03:47:47,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:47:47,173 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-14 03:47:47,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 51 [2024-11-14 03:47:47,985 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:47:47,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 42 [2024-11-14 03:47:48,382 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 03:47:48,383 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:48:02,881 WARN L851 $PredicateComparison]: unable to prove that (forall ((|func_to_recursive_line_38_to_43_0_#in~r.offset| Int)) (let ((.cse13 (select |c_#memory_int| |c_func_to_recursive_line_38_to_43_0_#in~r.base|))) (let ((.cse1 (select (select |c_#memory_int| |c_func_to_recursive_line_38_to_43_0_#in~v.base|) |c_func_to_recursive_line_38_to_43_0_#in~v.offset|)) (.cse0 (select .cse13 |func_to_recursive_line_38_to_43_0_#in~r.offset|))) (or (not (let ((.cse2 (select (select |c_#memory_int| |c_func_to_recursive_line_38_to_43_0_#in~u.base|) |c_func_to_recursive_line_38_to_43_0_#in~u.offset|))) (= (+ (* (select (select |c_#memory_int| |c_func_to_recursive_line_38_to_43_0_#in~A.base|) |c_func_to_recursive_line_38_to_43_0_#in~A.offset|) 4) (* .cse0 4) (* .cse1 .cse1) (* 2 .cse2)) (+ (* .cse2 .cse2) (* .cse1 2))))) (let ((.cse11 (store |c_#memory_int| |c_func_to_recursive_line_38_to_43_0_#in~r.base| (store .cse13 |func_to_recursive_line_38_to_43_0_#in~r.offset| (+ (* (- 1) .cse1) .cse0))))) (let ((.cse12 (select .cse11 |c_func_to_recursive_line_38_to_43_0_#in~v.base|))) (let ((.cse10 (select .cse12 |c_func_to_recursive_line_38_to_43_0_#in~v.offset|))) (let ((.cse8 (store .cse12 |c_func_to_recursive_line_38_to_43_0_#in~v.offset| (+ .cse10 2)))) (let ((.cse6 (let ((.cse9 (select (store .cse11 |c_func_to_recursive_line_38_to_43_0_#in~v.base| .cse8) |c_func_to_recursive_line_38_to_43_0_#in~r.base|))) (store .cse9 |func_to_recursive_line_38_to_43_0_#in~r.offset| (+ (- 2) (* (- 1) .cse10) (select .cse9 |func_to_recursive_line_38_to_43_0_#in~r.offset|)))))) (let ((.cse7 (select (store (store |c_#memory_int| |c_func_to_recursive_line_38_to_43_0_#in~v.base| .cse8) |c_func_to_recursive_line_38_to_43_0_#in~r.base| .cse6) |c_func_to_recursive_line_38_to_43_0_#in~v.base|))) (let ((.cse3 (select .cse7 |c_func_to_recursive_line_38_to_43_0_#in~v.offset|))) (let ((.cse4 (store (store |c_#memory_int| |c_func_to_recursive_line_38_to_43_0_#in~r.base| .cse6) |c_func_to_recursive_line_38_to_43_0_#in~v.base| (store .cse7 |c_func_to_recursive_line_38_to_43_0_#in~v.offset| (+ 2 .cse3))))) (let ((.cse5 (select (select .cse4 |c_func_to_recursive_line_38_to_43_0_#in~u.base|) |c_func_to_recursive_line_38_to_43_0_#in~u.offset|))) (= (+ (* 2 .cse3) (* 4 (select (select .cse4 |c_func_to_recursive_line_38_to_43_0_#in~A.base|) |c_func_to_recursive_line_38_to_43_0_#in~A.offset|)) (* (select (select .cse4 |c_func_to_recursive_line_38_to_43_0_#in~r.base|) |func_to_recursive_line_38_to_43_0_#in~r.offset|) 4) (* 2 .cse5) (* .cse3 .cse3)) (* .cse5 .cse5))))))))))))))) is different from false [2024-11-14 03:48:04,886 WARN L873 $PredicateComparison]: unable to prove that (forall ((|func_to_recursive_line_38_to_43_0_#in~r.offset| Int)) (let ((.cse13 (select |c_#memory_int| |c_func_to_recursive_line_38_to_43_0_#in~r.base|))) (let ((.cse1 (select (select |c_#memory_int| |c_func_to_recursive_line_38_to_43_0_#in~v.base|) |c_func_to_recursive_line_38_to_43_0_#in~v.offset|)) (.cse0 (select .cse13 |func_to_recursive_line_38_to_43_0_#in~r.offset|))) (or (not (let ((.cse2 (select (select |c_#memory_int| |c_func_to_recursive_line_38_to_43_0_#in~u.base|) |c_func_to_recursive_line_38_to_43_0_#in~u.offset|))) (= (+ (* (select (select |c_#memory_int| |c_func_to_recursive_line_38_to_43_0_#in~A.base|) |c_func_to_recursive_line_38_to_43_0_#in~A.offset|) 4) (* .cse0 4) (* .cse1 .cse1) (* 2 .cse2)) (+ (* .cse2 .cse2) (* .cse1 2))))) (let ((.cse11 (store |c_#memory_int| |c_func_to_recursive_line_38_to_43_0_#in~r.base| (store .cse13 |func_to_recursive_line_38_to_43_0_#in~r.offset| (+ (* (- 1) .cse1) .cse0))))) (let ((.cse12 (select .cse11 |c_func_to_recursive_line_38_to_43_0_#in~v.base|))) (let ((.cse10 (select .cse12 |c_func_to_recursive_line_38_to_43_0_#in~v.offset|))) (let ((.cse8 (store .cse12 |c_func_to_recursive_line_38_to_43_0_#in~v.offset| (+ .cse10 2)))) (let ((.cse6 (let ((.cse9 (select (store .cse11 |c_func_to_recursive_line_38_to_43_0_#in~v.base| .cse8) |c_func_to_recursive_line_38_to_43_0_#in~r.base|))) (store .cse9 |func_to_recursive_line_38_to_43_0_#in~r.offset| (+ (- 2) (* (- 1) .cse10) (select .cse9 |func_to_recursive_line_38_to_43_0_#in~r.offset|)))))) (let ((.cse7 (select (store (store |c_#memory_int| |c_func_to_recursive_line_38_to_43_0_#in~v.base| .cse8) |c_func_to_recursive_line_38_to_43_0_#in~r.base| .cse6) |c_func_to_recursive_line_38_to_43_0_#in~v.base|))) (let ((.cse3 (select .cse7 |c_func_to_recursive_line_38_to_43_0_#in~v.offset|))) (let ((.cse4 (store (store |c_#memory_int| |c_func_to_recursive_line_38_to_43_0_#in~r.base| .cse6) |c_func_to_recursive_line_38_to_43_0_#in~v.base| (store .cse7 |c_func_to_recursive_line_38_to_43_0_#in~v.offset| (+ 2 .cse3))))) (let ((.cse5 (select (select .cse4 |c_func_to_recursive_line_38_to_43_0_#in~u.base|) |c_func_to_recursive_line_38_to_43_0_#in~u.offset|))) (= (+ (* 2 .cse3) (* 4 (select (select .cse4 |c_func_to_recursive_line_38_to_43_0_#in~A.base|) |c_func_to_recursive_line_38_to_43_0_#in~A.offset|)) (* (select (select .cse4 |c_func_to_recursive_line_38_to_43_0_#in~r.base|) |func_to_recursive_line_38_to_43_0_#in~r.offset|) 4) (* 2 .cse5) (* .cse3 .cse3)) (* .cse5 .cse5))))))))))))))) is different from true [2024-11-14 03:48:38,144 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:48:38,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329793172] [2024-11-14 03:48:38,144 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:48:38,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215379388] [2024-11-14 03:48:38,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215379388] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:48:38,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1488645067] [2024-11-14 03:48:38,147 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-14 03:48:38,147 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:48:38,147 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:276) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-14 03:48:38,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:48:38,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-11-14 03:48:38,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350365575] [2024-11-14 03:48:38,148 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-14 03:48:38,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-14 03:48:38,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:48:38,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-14 03:48:38,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=872, Unknown=15, NotChecked=60, Total=1056 [2024-11-14 03:48:38,149 INFO L87 Difference]: Start difference. First operand 155 states and 200 transitions. Second operand has 21 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 16 states have internal predecessors, (30), 7 states have call successors, (10), 8 states have call predecessors, (10), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-14 03:48:46,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 03:48:54,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 03:48:57,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 03:48:59,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 03:49:01,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 03:49:03,061 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 03:49:08,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:49:08,418 INFO L93 Difference]: Finished difference Result 209 states and 267 transitions. [2024-11-14 03:49:08,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-14 03:49:08,419 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 16 states have internal predecessors, (30), 7 states have call successors, (10), 8 states have call predecessors, (10), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 46 [2024-11-14 03:49:08,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:49:08,422 INFO L225 Difference]: With dead ends: 209 [2024-11-14 03:49:08,422 INFO L226 Difference]: Without dead ends: 207 [2024-11-14 03:49:08,423 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 63.3s TimeCoverageRelationStatistics Valid=205, Invalid=1503, Unknown=18, NotChecked=80, Total=1806 [2024-11-14 03:49:08,424 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 92 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 14 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:49:08,424 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 624 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 769 Invalid, 4 Unknown, 0 Unchecked, 16.9s Time] [2024-11-14 03:49:08,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2024-11-14 03:49:08,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 202. [2024-11-14 03:49:08,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 122 states have (on average 1.1475409836065573) internal successors, (140), 131 states have internal predecessors, (140), 46 states have call successors, (46), 26 states have call predecessors, (46), 33 states have return successors, (73), 47 states have call predecessors, (73), 43 states have call successors, (73) [2024-11-14 03:49:08,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 259 transitions. [2024-11-14 03:49:08,498 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 259 transitions. Word has length 46 [2024-11-14 03:49:08,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:49:08,499 INFO L471 AbstractCegarLoop]: Abstraction has 202 states and 259 transitions. [2024-11-14 03:49:08,499 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 16 states have internal predecessors, (30), 7 states have call successors, (10), 8 states have call predecessors, (10), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-14 03:49:08,499 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 259 transitions. [2024-11-14 03:49:08,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-14 03:49:08,500 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:49:08,500 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:49:08,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 03:49:08,700 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:49:08,701 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:49:08,701 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:49:08,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1408369266, now seen corresponding path program 1 times [2024-11-14 03:49:08,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:49:08,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183969754] [2024-11-14 03:49:08,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:49:08,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:49:08,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:49:08,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [113748140] [2024-11-14 03:49:08,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:49:08,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:49:08,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:49:08,806 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:49:08,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 03:49:09,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:49:09,207 WARN L253 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 187 conjuncts are in the unsatisfiable core [2024-11-14 03:49:09,213 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:49:09,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-14 03:49:09,235 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-11-14 03:49:09,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2024-11-14 03:49:09,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:49:09,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:49:09,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 37 [2024-11-14 03:49:12,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:49:12,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 67 [2024-11-14 03:49:13,079 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-14 03:49:13,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 57 [2024-11-14 03:49:13,302 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 03:49:13,302 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:49:26,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:49:26,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183969754] [2024-11-14 03:49:26,642 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:49:26,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113748140] [2024-11-14 03:49:26,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113748140] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:49:26,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [746181777] [2024-11-14 03:49:26,644 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2024-11-14 03:49:26,644 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:49:26,645 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:276) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-14 03:49:26,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:49:26,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-11-14 03:49:26,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050745132] [2024-11-14 03:49:26,646 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-14 03:49:26,646 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-14 03:49:26,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:49:26,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-14 03:49:26,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=718, Unknown=3, NotChecked=0, Total=812 [2024-11-14 03:49:26,647 INFO L87 Difference]: Start difference. First operand 202 states and 259 transitions. Second operand has 19 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 8 states have call successors, (10), 7 states have call predecessors, (10), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-14 03:49:36,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-11-14 03:49:39,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:49:39,172 INFO L93 Difference]: Finished difference Result 299 states and 381 transitions. [2024-11-14 03:49:39,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-14 03:49:39,173 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 8 states have call successors, (10), 7 states have call predecessors, (10), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 48 [2024-11-14 03:49:39,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:49:39,176 INFO L225 Difference]: With dead ends: 299 [2024-11-14 03:49:39,176 INFO L226 Difference]: Without dead ends: 297 [2024-11-14 03:49:39,178 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=280, Invalid=1697, Unknown=3, NotChecked=0, Total=1980 [2024-11-14 03:49:39,178 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 89 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 62 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:49:39,179 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 221 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 638 Invalid, 7 Unknown, 0 Unchecked, 8.3s Time] [2024-11-14 03:49:39,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2024-11-14 03:49:39,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 224. [2024-11-14 03:49:39,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 138 states have (on average 1.144927536231884) internal successors, (158), 148 states have internal predecessors, (158), 48 states have call successors, (48), 30 states have call predecessors, (48), 37 states have return successors, (75), 49 states have call predecessors, (75), 45 states have call successors, (75) [2024-11-14 03:49:39,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 281 transitions. [2024-11-14 03:49:39,291 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 281 transitions. Word has length 48 [2024-11-14 03:49:39,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:49:39,292 INFO L471 AbstractCegarLoop]: Abstraction has 224 states and 281 transitions. [2024-11-14 03:49:39,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 8 states have call successors, (10), 7 states have call predecessors, (10), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-14 03:49:39,292 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 281 transitions. [2024-11-14 03:49:39,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-14 03:49:39,293 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:49:39,293 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:49:39,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 03:49:39,494 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:49:39,494 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:49:39,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:49:39,494 INFO L85 PathProgramCache]: Analyzing trace with hash -438687373, now seen corresponding path program 1 times [2024-11-14 03:49:39,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:49:39,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723299466] [2024-11-14 03:49:39,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:49:39,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:49:39,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:49:41,027 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-14 03:49:41,028 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:49:41,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723299466] [2024-11-14 03:49:41,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723299466] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:49:41,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:49:41,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2024-11-14 03:49:41,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338331836] [2024-11-14 03:49:41,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:49:41,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-14 03:49:41,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:49:41,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-14 03:49:41,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2024-11-14 03:49:41,030 INFO L87 Difference]: Start difference. First operand 224 states and 281 transitions. Second operand has 15 states, 10 states have (on average 2.6) internal successors, (26), 13 states have internal predecessors, (26), 7 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-14 03:49:42,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:49:42,152 INFO L93 Difference]: Finished difference Result 372 states and 469 transitions. [2024-11-14 03:49:42,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-14 03:49:42,152 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 10 states have (on average 2.6) internal successors, (26), 13 states have internal predecessors, (26), 7 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 50 [2024-11-14 03:49:42,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:49:42,155 INFO L225 Difference]: With dead ends: 372 [2024-11-14 03:49:42,155 INFO L226 Difference]: Without dead ends: 201 [2024-11-14 03:49:42,157 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2024-11-14 03:49:42,157 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 18 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 03:49:42,158 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 107 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 03:49:42,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-11-14 03:49:42,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 199. [2024-11-14 03:49:42,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 124 states have (on average 1.1290322580645162) internal successors, (140), 132 states have internal predecessors, (140), 41 states have call successors, (41), 27 states have call predecessors, (41), 33 states have return successors, (59), 40 states have call predecessors, (59), 38 states have call successors, (59) [2024-11-14 03:49:42,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 240 transitions. [2024-11-14 03:49:42,223 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 240 transitions. Word has length 50 [2024-11-14 03:49:42,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:49:42,223 INFO L471 AbstractCegarLoop]: Abstraction has 199 states and 240 transitions. [2024-11-14 03:49:42,223 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 10 states have (on average 2.6) internal successors, (26), 13 states have internal predecessors, (26), 7 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-14 03:49:42,224 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 240 transitions. [2024-11-14 03:49:42,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-14 03:49:42,225 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:49:42,225 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:49:42,225 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-14 03:49:42,225 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:49:42,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:49:42,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1169705389, now seen corresponding path program 1 times [2024-11-14 03:49:42,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:49:42,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416215152] [2024-11-14 03:49:42,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:49:42,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:49:42,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:49:42,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [717624144] [2024-11-14 03:49:42,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:49:42,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:49:42,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:49:42,286 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:49:42,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee79503f-e1bf-491b-a233-14860f2fc90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 03:49:42,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:49:42,603 WARN L253 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 179 conjuncts are in the unsatisfiable core [2024-11-14 03:49:42,608 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:49:42,623 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-11-14 03:49:42,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2024-11-14 03:49:42,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-14 03:49:43,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:49:43,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:49:43,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 48