./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.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_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/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_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/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_90c491da-b510-467b-babb-1c1df7904e90/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 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 05:36:16,963 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 05:36:17,045 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 05:36:17,054 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 05:36:17,054 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 05:36:17,093 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 05:36:17,094 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 05:36:17,094 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 05:36:17,094 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 05:36:17,094 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 05:36:17,094 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 05:36:17,094 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 05:36:17,094 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 05:36:17,095 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 05:36:17,095 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 05:36:17,095 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 05:36:17,095 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 05:36:17,095 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 05:36:17,095 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 05:36:17,095 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 05:36:17,095 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 05:36:17,095 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 05:36:17,099 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 05:36:17,099 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 05:36:17,099 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 05:36:17,099 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 05:36:17,099 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 05:36:17,100 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 05:36:17,100 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 05:36:17,100 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 05:36:17,100 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 05:36:17,100 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 05:36:17,100 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 05:36:17,100 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 05:36:17,100 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 05:36:17,100 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 05:36:17,100 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 05:36:17,100 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 05:36:17,100 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 05:36:17,101 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 05:36:17,101 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 05:36:17,101 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 05:36:17,101 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 05:36:17,101 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 05:36:17,101 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 05:36:17,101 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 05:36:17,101 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 05:36:17,101 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_90c491da-b510-467b-babb-1c1df7904e90/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 -> 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 [2024-11-14 05:36:17,421 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 05:36:17,429 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 05:36:17,431 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 05:36:17,433 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 05:36:17,433 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 05:36:17,434 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c Unable to find full path for "g++" [2024-11-14 05:36:19,282 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 05:36:19,559 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 05:36:19,560 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2024-11-14 05:36:19,568 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/data/e282fb351/9d91089b4fc647dd901b6a3b512b8264/FLAG2004f2bab [2024-11-14 05:36:19,584 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/data/e282fb351/9d91089b4fc647dd901b6a3b512b8264 [2024-11-14 05:36:19,586 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 05:36:19,588 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 05:36:19,589 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 05:36:19,589 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 05:36:19,600 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 05:36:19,601 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 05:36:19" (1/1) ... [2024-11-14 05:36:19,602 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50defa1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:36:19, skipping insertion in model container [2024-11-14 05:36:19,602 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 05:36:19" (1/1) ... [2024-11-14 05:36:19,627 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 05:36:19,803 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_90c491da-b510-467b-babb-1c1df7904e90/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c[728,741] [2024-11-14 05:36:19,861 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 05:36:19,873 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 05:36:19,885 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_90c491da-b510-467b-babb-1c1df7904e90/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c[728,741] [2024-11-14 05:36:19,936 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 05:36:19,954 INFO L204 MainTranslator]: Completed translation [2024-11-14 05:36:19,956 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:36:19 WrapperNode [2024-11-14 05:36:19,956 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 05:36:19,958 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 05:36:19,959 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 05:36:19,959 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 05:36:19,966 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:36:19" (1/1) ... [2024-11-14 05:36:19,973 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:36:19" (1/1) ... [2024-11-14 05:36:19,992 INFO L138 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 147 [2024-11-14 05:36:19,992 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 05:36:19,992 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 05:36:19,993 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 05:36:19,993 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 05:36:19,999 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:36:19" (1/1) ... [2024-11-14 05:36:19,999 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:36:19" (1/1) ... [2024-11-14 05:36:20,001 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:36:19" (1/1) ... [2024-11-14 05:36:20,001 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:36:19" (1/1) ... [2024-11-14 05:36:20,005 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:36:19" (1/1) ... [2024-11-14 05:36:20,009 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:36:19" (1/1) ... [2024-11-14 05:36:20,010 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:36:19" (1/1) ... [2024-11-14 05:36:20,011 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:36:19" (1/1) ... [2024-11-14 05:36:20,013 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 05:36:20,014 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 05:36:20,014 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 05:36:20,014 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 05:36:20,015 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:36:19" (1/1) ... [2024-11-14 05:36:20,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 05:36:20,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:36:20,046 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 05:36:20,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 05:36:20,075 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 05:36:20,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 05:36:20,075 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-11-14 05:36:20,075 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-11-14 05:36:20,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 05:36:20,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 05:36:20,076 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-14 05:36:20,076 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-14 05:36:20,162 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 05:36:20,164 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 05:36:20,572 INFO L? ?]: Removed 66 outVars from TransFormulas that were not future-live. [2024-11-14 05:36:20,573 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 05:36:20,809 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 05:36:20,811 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-14 05:36:20,811 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 05:36:20 BoogieIcfgContainer [2024-11-14 05:36:20,812 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 05:36:20,814 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 05:36:20,816 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 05:36:20,820 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 05:36:20,821 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 05:36:19" (1/3) ... [2024-11-14 05:36:20,822 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f4b681c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 05:36:20, skipping insertion in model container [2024-11-14 05:36:20,822 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:36:19" (2/3) ... [2024-11-14 05:36:20,823 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f4b681c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 05:36:20, skipping insertion in model container [2024-11-14 05:36:20,823 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 05:36:20" (3/3) ... [2024-11-14 05:36:20,825 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_3a.c.cil.c [2024-11-14 05:36:20,842 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 05:36:20,843 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG soft_float_3a.c.cil.c that has 3 procedures, 39 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-14 05:36:20,911 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 05:36:20,932 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;@415531ef, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 05:36:20,934 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 05:36:20,939 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 32 states have internal predecessors, (47), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-14 05:36:20,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-14 05:36:20,951 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:36:20,951 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:36:20,952 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:36:20,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:36:20,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1494095182, now seen corresponding path program 1 times [2024-11-14 05:36:20,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:36:20,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702874824] [2024-11-14 05:36:20,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:36:20,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:36:21,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:36:21,494 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 05:36:21,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:36:21,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702874824] [2024-11-14 05:36:21,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702874824] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:36:21,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607046632] [2024-11-14 05:36:21,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:36:21,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:36:21,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:36:21,500 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:36:21,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 05:36:21,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:36:21,620 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 05:36:21,627 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:36:21,687 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 05:36:21,687 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:36:21,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607046632] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:36:21,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:36:21,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-14 05:36:21,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016812383] [2024-11-14 05:36:21,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:36:21,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 05:36:21,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:36:21,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 05:36:21,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:36:21,718 INFO L87 Difference]: Start difference. First operand has 39 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 32 states have internal predecessors, (47), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 05:36:21,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:36:21,926 INFO L93 Difference]: Finished difference Result 88 states and 138 transitions. [2024-11-14 05:36:21,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 05:36:21,929 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2024-11-14 05:36:21,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:36:21,936 INFO L225 Difference]: With dead ends: 88 [2024-11-14 05:36:21,936 INFO L226 Difference]: Without dead ends: 47 [2024-11-14 05:36:21,940 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-14 05:36:21,942 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 11 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:36:21,943 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 86 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:36:21,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-14 05:36:21,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2024-11-14 05:36:21,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-14 05:36:21,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 54 transitions. [2024-11-14 05:36:21,983 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 54 transitions. Word has length 32 [2024-11-14 05:36:21,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:36:21,984 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 54 transitions. [2024-11-14 05:36:21,984 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 05:36:21,984 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 54 transitions. [2024-11-14 05:36:21,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-14 05:36:21,987 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:36:21,987 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 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 05:36:22,009 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 05:36:22,188 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-14 05:36:22,188 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:36:22,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:36:22,189 INFO L85 PathProgramCache]: Analyzing trace with hash -324059656, now seen corresponding path program 1 times [2024-11-14 05:36:22,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:36:22,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762982898] [2024-11-14 05:36:22,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:36:22,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:36:22,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:36:22,475 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 05:36:22,476 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:36:22,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762982898] [2024-11-14 05:36:22,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762982898] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:36:22,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068859093] [2024-11-14 05:36:22,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:36:22,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:36:22,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:36:22,482 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:36:22,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 05:36:22,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:36:22,574 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:36:22,576 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:36:22,627 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 05:36:22,627 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:36:22,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068859093] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:36:22,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:36:22,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-14 05:36:22,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109190428] [2024-11-14 05:36:22,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:36:22,628 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 05:36:22,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:36:22,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 05:36:22,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:36:22,629 INFO L87 Difference]: Start difference. First operand 39 states and 54 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 05:36:22,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:36:22,743 INFO L93 Difference]: Finished difference Result 77 states and 108 transitions. [2024-11-14 05:36:22,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 05:36:22,743 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2024-11-14 05:36:22,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:36:22,745 INFO L225 Difference]: With dead ends: 77 [2024-11-14 05:36:22,746 INFO L226 Difference]: Without dead ends: 44 [2024-11-14 05:36:22,747 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:36:22,747 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:36:22,749 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 86 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:36:22,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-14 05:36:22,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2024-11-14 05:36:22,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 35 states have internal predecessors, (47), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-14 05:36:22,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 60 transitions. [2024-11-14 05:36:22,764 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 60 transitions. Word has length 35 [2024-11-14 05:36:22,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:36:22,764 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 60 transitions. [2024-11-14 05:36:22,765 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 05:36:22,765 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 60 transitions. [2024-11-14 05:36:22,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-14 05:36:22,766 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:36:22,766 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 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 05:36:22,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-14 05:36:22,966 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:36:22,967 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:36:22,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:36:22,967 INFO L85 PathProgramCache]: Analyzing trace with hash 731200642, now seen corresponding path program 1 times [2024-11-14 05:36:22,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:36:22,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333365595] [2024-11-14 05:36:22,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:36:22,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:36:22,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:36:23,158 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 05:36:23,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:36:23,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333365595] [2024-11-14 05:36:23,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333365595] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:36:23,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965551739] [2024-11-14 05:36:23,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:36:23,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:36:23,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:36:23,163 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:36:23,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 05:36:23,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:36:23,258 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:36:23,261 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:36:23,301 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 05:36:23,301 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:36:23,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965551739] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:36:23,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:36:23,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-14 05:36:23,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72751298] [2024-11-14 05:36:23,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:36:23,302 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 05:36:23,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:36:23,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 05:36:23,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:36:23,306 INFO L87 Difference]: Start difference. First operand 43 states and 60 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 05:36:23,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:36:23,405 INFO L93 Difference]: Finished difference Result 86 states and 122 transitions. [2024-11-14 05:36:23,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 05:36:23,407 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2024-11-14 05:36:23,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:36:23,408 INFO L225 Difference]: With dead ends: 86 [2024-11-14 05:36:23,408 INFO L226 Difference]: Without dead ends: 49 [2024-11-14 05:36:23,409 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:36:23,409 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 7 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:36:23,410 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 86 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:36:23,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-14 05:36:23,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2024-11-14 05:36:23,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 37 states have (on average 1.4054054054054055) internal successors, (52), 38 states have internal predecessors, (52), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-14 05:36:23,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 65 transitions. [2024-11-14 05:36:23,422 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 65 transitions. Word has length 36 [2024-11-14 05:36:23,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:36:23,423 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 65 transitions. [2024-11-14 05:36:23,424 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 05:36:23,424 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 65 transitions. [2024-11-14 05:36:23,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-14 05:36:23,426 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:36:23,426 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 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 05:36:23,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-14 05:36:23,627 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:36:23,627 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:36:23,627 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:36:23,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1991138772, now seen corresponding path program 1 times [2024-11-14 05:36:23,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:36:23,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114694803] [2024-11-14 05:36:23,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:36:23,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:36:23,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:36:23,869 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 05:36:23,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:36:23,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114694803] [2024-11-14 05:36:23,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114694803] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:36:23,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780824535] [2024-11-14 05:36:23,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:36:23,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:36:23,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:36:23,873 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:36:23,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 05:36:23,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:36:23,963 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 05:36:23,965 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:36:24,050 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 05:36:24,055 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:36:24,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780824535] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:36:24,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:36:24,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2024-11-14 05:36:24,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079917848] [2024-11-14 05:36:24,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:36:24,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 05:36:24,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:36:24,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 05:36:24,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-14 05:36:24,056 INFO L87 Difference]: Start difference. First operand 46 states and 65 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 05:36:24,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:36:24,211 INFO L93 Difference]: Finished difference Result 91 states and 130 transitions. [2024-11-14 05:36:24,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 05:36:24,212 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2024-11-14 05:36:24,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:36:24,213 INFO L225 Difference]: With dead ends: 91 [2024-11-14 05:36:24,213 INFO L226 Difference]: Without dead ends: 51 [2024-11-14 05:36:24,214 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-11-14 05:36:24,214 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 11 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:36:24,215 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 90 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:36:24,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-14 05:36:24,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2024-11-14 05:36:24,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 38 states have (on average 1.394736842105263) internal successors, (53), 39 states have internal predecessors, (53), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-14 05:36:24,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 66 transitions. [2024-11-14 05:36:24,227 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 66 transitions. Word has length 36 [2024-11-14 05:36:24,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:36:24,227 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 66 transitions. [2024-11-14 05:36:24,227 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 05:36:24,227 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 66 transitions. [2024-11-14 05:36:24,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-14 05:36:24,228 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:36:24,228 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 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 05:36:24,248 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 05:36:24,428 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:36:24,429 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:36:24,430 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:36:24,430 INFO L85 PathProgramCache]: Analyzing trace with hash 879800158, now seen corresponding path program 1 times [2024-11-14 05:36:24,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:36:24,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351980888] [2024-11-14 05:36:24,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:36:24,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:36:24,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:36:24,963 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 05:36:24,963 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:36:24,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351980888] [2024-11-14 05:36:24,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351980888] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:36:24,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172072316] [2024-11-14 05:36:24,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:36:24,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:36:24,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:36:24,971 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:36:24,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 05:36:25,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:36:25,067 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-14 05:36:25,070 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:36:25,153 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 05:36:25,153 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:36:25,538 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 05:36:25,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172072316] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:36:25,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1290785873] [2024-11-14 05:36:25,570 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-14 05:36:25,571 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:36:25,574 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:36:25,580 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:36:25,580 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:36:26,041 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 43 for LOIs [2024-11-14 05:36:26,389 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:36:27,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1290785873] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:36:27,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:36:27,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11, 11, 11] total 27 [2024-11-14 05:36:27,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036044503] [2024-11-14 05:36:27,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:36:27,503 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-14 05:36:27,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:36:27,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-14 05:36:27,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2024-11-14 05:36:27,504 INFO L87 Difference]: Start difference. First operand 47 states and 66 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 05:36:27,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:36:27,733 INFO L93 Difference]: Finished difference Result 104 states and 146 transitions. [2024-11-14 05:36:27,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 05:36:27,735 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 37 [2024-11-14 05:36:27,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:36:27,736 INFO L225 Difference]: With dead ends: 104 [2024-11-14 05:36:27,736 INFO L226 Difference]: Without dead ends: 63 [2024-11-14 05:36:27,737 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2024-11-14 05:36:27,738 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 30 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:36:27,738 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 114 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:36:27,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-14 05:36:27,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 53. [2024-11-14 05:36:27,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 44 states have internal predecessors, (59), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-14 05:36:27,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2024-11-14 05:36:27,756 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 37 [2024-11-14 05:36:27,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:36:27,757 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2024-11-14 05:36:27,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 05:36:27,757 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2024-11-14 05:36:27,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-14 05:36:27,758 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:36:27,758 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 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] [2024-11-14 05:36:27,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 05:36:27,958 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:36:27,958 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:36:27,959 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:36:27,959 INFO L85 PathProgramCache]: Analyzing trace with hash -454781783, now seen corresponding path program 1 times [2024-11-14 05:36:27,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:36:27,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726103071] [2024-11-14 05:36:27,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:36:27,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:36:27,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:36:28,383 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 05:36:28,384 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:36:28,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726103071] [2024-11-14 05:36:28,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726103071] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:36:28,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376602322] [2024-11-14 05:36:28,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:36:28,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:36:28,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:36:28,387 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:36:28,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 05:36:28,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:36:28,469 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-14 05:36:28,471 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:36:28,577 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-14 05:36:28,577 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:36:28,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376602322] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:36:28,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:36:28,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [11] total 15 [2024-11-14 05:36:28,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23180817] [2024-11-14 05:36:28,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:36:28,577 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-14 05:36:28,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:36:28,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-14 05:36:28,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2024-11-14 05:36:28,578 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 13 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 05:36:28,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:36:28,802 INFO L93 Difference]: Finished difference Result 89 states and 118 transitions. [2024-11-14 05:36:28,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 05:36:28,803 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2024-11-14 05:36:28,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:36:28,805 INFO L225 Difference]: With dead ends: 89 [2024-11-14 05:36:28,805 INFO L226 Difference]: Without dead ends: 69 [2024-11-14 05:36:28,805 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2024-11-14 05:36:28,806 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 16 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:36:28,806 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 482 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:36:28,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-14 05:36:28,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 61. [2024-11-14 05:36:28,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 50 states have (on average 1.32) internal successors, (66), 50 states have internal predecessors, (66), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-14 05:36:28,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 79 transitions. [2024-11-14 05:36:28,821 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 79 transitions. Word has length 40 [2024-11-14 05:36:28,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:36:28,821 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 79 transitions. [2024-11-14 05:36:28,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 05:36:28,821 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 79 transitions. [2024-11-14 05:36:28,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-14 05:36:28,822 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:36:28,822 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 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] [2024-11-14 05:36:28,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 05:36:29,027 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:36:29,027 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:36:29,029 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:36:29,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1211061753, now seen corresponding path program 1 times [2024-11-14 05:36:29,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:36:29,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330953979] [2024-11-14 05:36:29,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:36:29,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:36:29,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:36:29,341 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 05:36:29,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:36:29,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330953979] [2024-11-14 05:36:29,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330953979] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:36:29,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380104167] [2024-11-14 05:36:29,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:36:29,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:36:29,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:36:29,347 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:36:29,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 05:36:29,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:36:29,691 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-14 05:36:29,694 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:36:30,358 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 05:36:30,359 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:36:31,600 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 05:36:31,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380104167] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:36:31,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [23876833] [2024-11-14 05:36:31,604 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2024-11-14 05:36:31,606 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:36:31,607 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:36:31,607 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:36:31,607 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:36:31,981 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 75 for LOIs [2024-11-14 05:36:32,056 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 11 for LOIs [2024-11-14 05:36:32,176 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:36:34,654 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2231#(and (= (select |#length| 3) 12) (<= 1 |#StackHeapBarrier|) (= 22 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| 0) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (exists ((|v_ULTIMATE.start_main_~one~0#1_29| Int) (|v_ULTIMATE.start_mulflt_~b#1_38| Int) (|v_ULTIMATE.start_main_~a~0#1_34| Int) (|v_ULTIMATE.start_main_~b~0#1_32| Int) (|v_ULTIMATE.start_mulflt_~a#1_28| Int)) (and (<= 1 (mod |v_ULTIMATE.start_main_~a~0#1_34| 4294967296)) (= |v_ULTIMATE.start_main_~b~0#1_32| |v_ULTIMATE.start_mulflt_~b#1_38|) (= (mod |v_ULTIMATE.start_main_~b~0#1_32| 4294967296) (mod |v_ULTIMATE.start_main_~one~0#1_29| 4294967296)) (= (mod |v_ULTIMATE.start_mulflt_~b#1_38| 4294967296) 0) (= |v_ULTIMATE.start_main_~a~0#1_34| |v_ULTIMATE.start_mulflt_~a#1_28|))) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0))' at error location [2024-11-14 05:36:34,654 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:36:34,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:36:34,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 19, 17] total 39 [2024-11-14 05:36:34,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12551651] [2024-11-14 05:36:34,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:36:34,655 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-14 05:36:34,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:36:34,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-14 05:36:34,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=2770, Unknown=0, NotChecked=0, Total=2970 [2024-11-14 05:36:34,658 INFO L87 Difference]: Start difference. First operand 61 states and 79 transitions. Second operand has 39 states, 32 states have (on average 2.25) internal successors, (72), 33 states have internal predecessors, (72), 5 states have call successors, (10), 3 states have call predecessors, (10), 7 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) [2024-11-14 05:36:37,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:36:37,024 INFO L93 Difference]: Finished difference Result 206 states and 321 transitions. [2024-11-14 05:36:37,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-14 05:36:37,025 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 32 states have (on average 2.25) internal successors, (72), 33 states have internal predecessors, (72), 5 states have call successors, (10), 3 states have call predecessors, (10), 7 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) Word has length 44 [2024-11-14 05:36:37,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:36:37,028 INFO L225 Difference]: With dead ends: 206 [2024-11-14 05:36:37,028 INFO L226 Difference]: Without dead ends: 160 [2024-11-14 05:36:37,032 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1846 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=532, Invalid=6608, Unknown=0, NotChecked=0, Total=7140 [2024-11-14 05:36:37,033 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 112 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 1297 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 1344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:36:37,033 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 609 Invalid, 1344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1297 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 05:36:37,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-11-14 05:36:37,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 80. [2024-11-14 05:36:37,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 66 states have (on average 1.3181818181818181) internal successors, (87), 66 states have internal predecessors, (87), 8 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) [2024-11-14 05:36:37,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 107 transitions. [2024-11-14 05:36:37,054 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 107 transitions. Word has length 44 [2024-11-14 05:36:37,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:36:37,055 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 107 transitions. [2024-11-14 05:36:37,055 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 32 states have (on average 2.25) internal successors, (72), 33 states have internal predecessors, (72), 5 states have call successors, (10), 3 states have call predecessors, (10), 7 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) [2024-11-14 05:36:37,055 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 107 transitions. [2024-11-14 05:36:37,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-14 05:36:37,056 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:36:37,056 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 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 05:36:37,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 05:36:37,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-14 05:36:37,257 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:36:37,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:36:37,257 INFO L85 PathProgramCache]: Analyzing trace with hash 702585395, now seen corresponding path program 1 times [2024-11-14 05:36:37,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:36:37,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979545727] [2024-11-14 05:36:37,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:36:37,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:36:37,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:36:37,408 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 05:36:37,409 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:36:37,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979545727] [2024-11-14 05:36:37,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979545727] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:36:37,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846926990] [2024-11-14 05:36:37,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:36:37,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:36:37,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:36:37,411 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:36:37,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 05:36:37,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:36:37,482 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 05:36:37,484 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:36:37,557 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 05:36:37,558 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:36:37,713 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 05:36:37,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846926990] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:36:37,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [121076203] [2024-11-14 05:36:37,715 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2024-11-14 05:36:37,715 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:36:37,715 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:36:37,715 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:36:37,715 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:36:38,163 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 62 for LOIs [2024-11-14 05:36:38,213 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 46 for LOIs [2024-11-14 05:36:38,323 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:36:40,106 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2982#(and (exists ((|v_ULTIMATE.start_main_~eb~2#1_BEFORE_CALL_28| Int) (|v_ULTIMATE.start_mulflt_~b#1_41| Int) (|v_ULTIMATE.start_mulflt_~a#1_31| Int) (|v_ULTIMATE.start_main_~b~0#1_34| Int) (|v_ULTIMATE.start_main_~a~0#1_36| Int)) (and (= |v_ULTIMATE.start_main_~b~0#1_34| |v_ULTIMATE.start_mulflt_~b#1_41|) (<= |v_ULTIMATE.start_main_~eb~2#1_BEFORE_CALL_28| 127) (= |v_ULTIMATE.start_main_~a~0#1_36| |v_ULTIMATE.start_mulflt_~a#1_31|) (= |v_ULTIMATE.start_main_~b~0#1_34| 0) (<= |v_ULTIMATE.start_main_~a~0#1_36| 4294967295) (<= 1 |v_ULTIMATE.start_main_~a~0#1_36|) (<= 0 (+ 128 |v_ULTIMATE.start_main_~eb~2#1_BEFORE_CALL_28|)))) (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 05:36:40,106 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:36:40,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:36:40,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-14 05:36:40,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000005135] [2024-11-14 05:36:40,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:36:40,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-14 05:36:40,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:36:40,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-14 05:36:40,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1340, Unknown=0, NotChecked=0, Total=1560 [2024-11-14 05:36:40,108 INFO L87 Difference]: Start difference. First operand 80 states and 107 transitions. Second operand has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-14 05:36:40,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:36:40,266 INFO L93 Difference]: Finished difference Result 178 states and 255 transitions. [2024-11-14 05:36:40,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 05:36:40,266 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 48 [2024-11-14 05:36:40,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:36:40,268 INFO L225 Difference]: With dead ends: 178 [2024-11-14 05:36:40,268 INFO L226 Difference]: Without dead ends: 135 [2024-11-14 05:36:40,269 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=238, Invalid=1402, Unknown=0, NotChecked=0, Total=1640 [2024-11-14 05:36:40,270 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 67 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:36:40,270 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 172 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:36:40,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-11-14 05:36:40,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 88. [2024-11-14 05:36:40,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 74 states have (on average 1.2837837837837838) internal successors, (95), 74 states have internal predecessors, (95), 8 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) [2024-11-14 05:36:40,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 115 transitions. [2024-11-14 05:36:40,289 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 115 transitions. Word has length 48 [2024-11-14 05:36:40,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:36:40,289 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 115 transitions. [2024-11-14 05:36:40,290 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-14 05:36:40,290 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 115 transitions. [2024-11-14 05:36:40,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-14 05:36:40,290 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:36:40,291 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 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] [2024-11-14 05:36:40,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-14 05:36:40,495 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:36:40,495 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:36:40,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:36:40,495 INFO L85 PathProgramCache]: Analyzing trace with hash 706139489, now seen corresponding path program 1 times [2024-11-14 05:36:40,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:36:40,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631077853] [2024-11-14 05:36:40,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:36:40,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:36:40,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:36:40,819 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 05:36:40,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:36:40,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631077853] [2024-11-14 05:36:40,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631077853] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:36:40,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481973873] [2024-11-14 05:36:40,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:36:40,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:36:40,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:36:40,822 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:36:40,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 05:36:40,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:36:40,966 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-14 05:36:40,968 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:36:41,060 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-14 05:36:41,060 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:36:41,230 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-14 05:36:41,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481973873] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:36:41,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1566406762] [2024-11-14 05:36:41,233 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2024-11-14 05:36:41,233 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:36:41,233 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:36:41,233 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:36:41,233 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:36:41,681 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2024-11-14 05:36:41,694 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 11 for LOIs [2024-11-14 05:36:41,800 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:36:45,794 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3654#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~a~0#1_38| Int)) (<= (mod |v_ULTIMATE.start_main_~a~0#1_38| 4294967296) 4294967294)) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 05:36:45,794 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:36:45,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:36:45,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2024-11-14 05:36:45,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221738192] [2024-11-14 05:36:45,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:36:45,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-14 05:36:45,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:36:45,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-14 05:36:45,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1011, Unknown=1, NotChecked=0, Total=1122 [2024-11-14 05:36:45,797 INFO L87 Difference]: Start difference. First operand 88 states and 115 transitions. Second operand has 17 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-14 05:36:46,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:36:46,577 INFO L93 Difference]: Finished difference Result 164 states and 241 transitions. [2024-11-14 05:36:46,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-14 05:36:46,578 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 48 [2024-11-14 05:36:46,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:36:46,579 INFO L225 Difference]: With dead ends: 164 [2024-11-14 05:36:46,579 INFO L226 Difference]: Without dead ends: 116 [2024-11-14 05:36:46,580 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=209, Invalid=2046, Unknown=1, NotChecked=0, Total=2256 [2024-11-14 05:36:46,580 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 49 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:36:46,581 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 309 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 05:36:46,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-11-14 05:36:46,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 82. [2024-11-14 05:36:46,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 69 states have (on average 1.2753623188405796) internal successors, (88), 70 states have internal predecessors, (88), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-14 05:36:46,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 104 transitions. [2024-11-14 05:36:46,599 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 104 transitions. Word has length 48 [2024-11-14 05:36:46,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:36:46,600 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 104 transitions. [2024-11-14 05:36:46,600 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-14 05:36:46,600 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 104 transitions. [2024-11-14 05:36:46,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-14 05:36:46,601 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:36:46,601 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 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] [2024-11-14 05:36:46,620 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-14 05:36:46,801 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:36:46,801 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:36:46,802 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:36:46,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1335864010, now seen corresponding path program 2 times [2024-11-14 05:36:46,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:36:46,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239829696] [2024-11-14 05:36:46,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:36:46,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:36:46,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:36:47,054 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-14 05:36:47,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:36:47,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239829696] [2024-11-14 05:36:47,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239829696] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:36:47,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:36:47,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 05:36:47,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504671991] [2024-11-14 05:36:47,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:36:47,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 05:36:47,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:36:47,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 05:36:47,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:36:47,056 INFO L87 Difference]: Start difference. First operand 82 states and 104 transitions. Second operand has 6 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-14 05:36:47,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:36:47,125 INFO L93 Difference]: Finished difference Result 99 states and 126 transitions. [2024-11-14 05:36:47,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 05:36:47,125 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2024-11-14 05:36:47,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:36:47,127 INFO L225 Difference]: With dead ends: 99 [2024-11-14 05:36:47,127 INFO L226 Difference]: Without dead ends: 84 [2024-11-14 05:36:47,127 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:36:47,128 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:36:47,128 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 205 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:36:47,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-14 05:36:47,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2024-11-14 05:36:47,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 69 states have (on average 1.2753623188405796) internal successors, (88), 70 states have internal predecessors, (88), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-14 05:36:47,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 103 transitions. [2024-11-14 05:36:47,143 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 103 transitions. Word has length 51 [2024-11-14 05:36:47,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:36:47,143 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 103 transitions. [2024-11-14 05:36:47,144 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-14 05:36:47,144 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 103 transitions. [2024-11-14 05:36:47,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-14 05:36:47,144 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:36:47,145 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2024-11-14 05:36:47,145 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-14 05:36:47,145 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:36:47,145 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:36:47,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1357646551, now seen corresponding path program 2 times [2024-11-14 05:36:47,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:36:47,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580046164] [2024-11-14 05:36:47,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:36:47,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:36:47,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:36:47,356 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-14 05:36:47,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:36:47,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580046164] [2024-11-14 05:36:47,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580046164] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:36:47,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:36:47,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-14 05:36:47,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176247935] [2024-11-14 05:36:47,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:36:47,358 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 05:36:47,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:36:47,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 05:36:47,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-14 05:36:47,358 INFO L87 Difference]: Start difference. First operand 82 states and 103 transitions. Second operand has 8 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 05:36:47,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:36:47,503 INFO L93 Difference]: Finished difference Result 109 states and 144 transitions. [2024-11-14 05:36:47,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 05:36:47,504 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2024-11-14 05:36:47,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:36:47,505 INFO L225 Difference]: With dead ends: 109 [2024-11-14 05:36:47,505 INFO L226 Difference]: Without dead ends: 102 [2024-11-14 05:36:47,506 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-14 05:36:47,506 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 17 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:36:47,507 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 305 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:36:47,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-14 05:36:47,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 90. [2024-11-14 05:36:47,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 74 states have (on average 1.2567567567567568) internal successors, (93), 75 states have internal predecessors, (93), 9 states have call successors, (9), 4 states have call predecessors, (9), 6 states have return successors, (17), 10 states have call predecessors, (17), 8 states have call successors, (17) [2024-11-14 05:36:47,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 119 transitions. [2024-11-14 05:36:47,527 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 119 transitions. Word has length 54 [2024-11-14 05:36:47,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:36:47,527 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 119 transitions. [2024-11-14 05:36:47,527 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 05:36:47,527 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 119 transitions. [2024-11-14 05:36:47,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-14 05:36:47,528 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:36:47,528 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 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] [2024-11-14 05:36:47,528 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-14 05:36:47,528 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:36:47,529 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:36:47,529 INFO L85 PathProgramCache]: Analyzing trace with hash 21760467, now seen corresponding path program 1 times [2024-11-14 05:36:47,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:36:47,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911561735] [2024-11-14 05:36:47,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:36:47,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:36:47,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:36:47,857 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 05:36:47,858 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:36:47,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911561735] [2024-11-14 05:36:47,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911561735] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:36:47,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100001081] [2024-11-14 05:36:47,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:36:47,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:36:47,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:36:47,861 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:36:47,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 05:36:48,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:36:48,062 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-14 05:36:48,065 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:36:48,706 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-14 05:36:48,706 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:36:50,083 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-14 05:36:50,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100001081] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:36:50,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [856205508] [2024-11-14 05:36:50,085 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2024-11-14 05:36:50,085 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:36:50,086 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:36:50,086 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:36:50,086 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:36:50,377 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 75 for LOIs [2024-11-14 05:36:50,418 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 11 for LOIs [2024-11-14 05:36:50,511 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:36:52,904 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4902#(and (= (select |#length| 3) 12) (<= 1 |#StackHeapBarrier|) (= 22 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (exists ((|v_ULTIMATE.start_main_~a~0#1_40| Int) (|v_ULTIMATE.start_main_~b~0#1_39| Int) (|v_ULTIMATE.start_mulflt_~a#1_37| Int) (|v_ULTIMATE.start_main_~one~0#1_35| Int) (|v_ULTIMATE.start_mulflt_~b#1_49| Int)) (and (= 0 (mod |v_ULTIMATE.start_mulflt_~b#1_49| 4294967296)) (= |v_ULTIMATE.start_main_~b~0#1_39| |v_ULTIMATE.start_mulflt_~b#1_49|) (= (mod |v_ULTIMATE.start_main_~b~0#1_39| 4294967296) (mod |v_ULTIMATE.start_main_~one~0#1_35| 4294967296)) (= |v_ULTIMATE.start_main_~a~0#1_40| |v_ULTIMATE.start_mulflt_~a#1_37|) (<= 1 (mod |v_ULTIMATE.start_main_~a~0#1_40| 4294967296)))) (= |__VERIFIER_assert_#in~cond| 0) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0))' at error location [2024-11-14 05:36:52,904 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:36:52,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:36:52,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 18, 20] total 43 [2024-11-14 05:36:52,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196264052] [2024-11-14 05:36:52,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:36:52,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-14 05:36:52,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:36:52,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-14 05:36:52,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=3287, Unknown=0, NotChecked=0, Total=3540 [2024-11-14 05:36:52,907 INFO L87 Difference]: Start difference. First operand 90 states and 119 transitions. Second operand has 43 states, 37 states have (on average 2.4324324324324325) internal successors, (90), 38 states have internal predecessors, (90), 6 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) [2024-11-14 05:36:56,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:36:56,957 INFO L93 Difference]: Finished difference Result 261 states and 417 transitions. [2024-11-14 05:36:56,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-14 05:36:56,958 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 37 states have (on average 2.4324324324324325) internal successors, (90), 38 states have internal predecessors, (90), 6 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) Word has length 54 [2024-11-14 05:36:56,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:36:56,960 INFO L225 Difference]: With dead ends: 261 [2024-11-14 05:36:56,960 INFO L226 Difference]: Without dead ends: 215 [2024-11-14 05:36:56,963 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2506 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=884, Invalid=9016, Unknown=0, NotChecked=0, Total=9900 [2024-11-14 05:36:56,964 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 303 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 1437 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 1541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:36:56,964 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 561 Invalid, 1541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1437 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-14 05:36:56,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2024-11-14 05:36:57,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 99. [2024-11-14 05:36:57,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 81 states have (on average 1.2592592592592593) internal successors, (102), 83 states have internal predecessors, (102), 10 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (20), 11 states have call predecessors, (20), 9 states have call successors, (20) [2024-11-14 05:36:57,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 132 transitions. [2024-11-14 05:36:57,008 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 132 transitions. Word has length 54 [2024-11-14 05:36:57,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:36:57,008 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 132 transitions. [2024-11-14 05:36:57,008 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 37 states have (on average 2.4324324324324325) internal successors, (90), 38 states have internal predecessors, (90), 6 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) [2024-11-14 05:36:57,008 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 132 transitions. [2024-11-14 05:36:57,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-14 05:36:57,009 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:36:57,009 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 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] [2024-11-14 05:36:57,022 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-14 05:36:57,211 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-14 05:36:57,211 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:36:57,211 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:36:57,211 INFO L85 PathProgramCache]: Analyzing trace with hash 626959075, now seen corresponding path program 1 times [2024-11-14 05:36:57,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:36:57,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137998396] [2024-11-14 05:36:57,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:36:57,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:36:57,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:36:58,002 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 7 proven. 53 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 05:36:58,002 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:36:58,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137998396] [2024-11-14 05:36:58,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137998396] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:36:58,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902045537] [2024-11-14 05:36:58,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:36:58,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:36:58,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:36:58,005 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:36:58,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 05:36:58,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:36:58,159 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-14 05:36:58,162 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:36:58,825 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 7 proven. 53 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 05:36:58,825 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:37:00,058 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 3 proven. 53 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 05:37:00,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902045537] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:37:00,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [789012473] [2024-11-14 05:37:00,061 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2024-11-14 05:37:00,061 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:37:00,061 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:37:00,061 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:37:00,061 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:37:01,312 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 123 for LOIs [2024-11-14 05:37:01,497 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 46 for LOIs [2024-11-14 05:37:01,633 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:37:22,876 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5851#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_mulflt_~b#1_53| Int) (|v_ULTIMATE.start_main_~mb~2#1_BEFORE_CALL_15| Int) (|v_ULTIMATE.start_main_~a~0#1_43| Int) (|v_ULTIMATE.start_main_~eb~2#1_BEFORE_CALL_67| Int) (|v_ULTIMATE.start_main_~b~0#1_42| Int) (|v_ULTIMATE.start_main_~one~0#1_38| Int) (|v_ULTIMATE.start_mulflt_~a#1_40| Int)) (and (<= 1 (mod |v_ULTIMATE.start_main_~a~0#1_43| 4294967296)) (<= 0 (+ 128 |v_ULTIMATE.start_main_~eb~2#1_BEFORE_CALL_67|)) (= (mod |v_ULTIMATE.start_mulflt_~b#1_53| 4294967296) 0) (= |v_ULTIMATE.start_main_~b~0#1_42| |v_ULTIMATE.start_mulflt_~b#1_53|) (= (mod |v_ULTIMATE.start_main_~one~0#1_38| 4294967296) (mod |v_ULTIMATE.start_main_~b~0#1_42| 4294967296)) (= |v_ULTIMATE.start_main_~a~0#1_43| |v_ULTIMATE.start_mulflt_~a#1_40|) (<= |v_ULTIMATE.start_main_~eb~2#1_BEFORE_CALL_67| 127) (or (exists ((v_base2flt_~e_221 Int) (v_base2flt_~m_50 Int) (v_base2flt_~m_253 Int)) (and (= |v_ULTIMATE.start_main_~b~0#1_42| (* 16777216 (mod (+ v_base2flt_~e_221 128) 4294967296))) (or (and (<= 16777216 (mod v_base2flt_~m_253 4294967296)) (= v_base2flt_~e_221 |v_ULTIMATE.start_main_~eb~2#1_BEFORE_CALL_67|) (<= (mod v_base2flt_~m_253 4294967296) 33554431) (= v_base2flt_~m_253 |v_ULTIMATE.start_main_~mb~2#1_BEFORE_CALL_15|)) (and (exists ((v_base2flt_~m_252 Int)) (= v_base2flt_~m_253 (* (mod v_base2flt_~m_252 4294967296) 2))) (<= 0 (+ v_base2flt_~e_221 128)) (<= 16777216 (mod v_base2flt_~m_253 4294967296)))) (= (mod v_base2flt_~m_50 4294967296) 0))) (and (= (mod |v_ULTIMATE.start_main_~mb~2#1_BEFORE_CALL_15| 4294967296) 0) (= |v_ULTIMATE.start_main_~b~0#1_42| 0))))) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 05:37:22,876 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:37:22,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:37:22,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 20] total 48 [2024-11-14 05:37:22,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693130928] [2024-11-14 05:37:22,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:37:22,877 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-14 05:37:22,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:37:22,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-14 05:37:22,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=4095, Unknown=5, NotChecked=0, Total=4422 [2024-11-14 05:37:22,879 INFO L87 Difference]: Start difference. First operand 99 states and 132 transitions. Second operand has 48 states, 43 states have (on average 2.372093023255814) internal successors, (102), 43 states have internal predecessors, (102), 5 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-14 05:37:26,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:37:26,357 INFO L93 Difference]: Finished difference Result 274 states and 441 transitions. [2024-11-14 05:37:26,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-14 05:37:26,358 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 43 states have (on average 2.372093023255814) internal successors, (102), 43 states have internal predecessors, (102), 5 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 3 states have call successors, (8) Word has length 56 [2024-11-14 05:37:26,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:37:26,360 INFO L225 Difference]: With dead ends: 274 [2024-11-14 05:37:26,361 INFO L226 Difference]: Without dead ends: 257 [2024-11-14 05:37:26,365 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 122 SyntacticMatches, 3 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2237 ImplicationChecksByTransitivity, 24.3s TimeCoverageRelationStatistics Valid=823, Invalid=7004, Unknown=5, NotChecked=0, Total=7832 [2024-11-14 05:37:26,367 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 234 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 1070 SdHoareTripleChecker+Invalid, 1391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-14 05:37:26,367 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 1070 Invalid, 1391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1255 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-14 05:37:26,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2024-11-14 05:37:26,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 104. [2024-11-14 05:37:26,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 89 states have (on average 1.3258426966292134) internal successors, (118), 90 states have internal predecessors, (118), 8 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (15), 9 states have call predecessors, (15), 7 states have call successors, (15) [2024-11-14 05:37:26,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 141 transitions. [2024-11-14 05:37:26,406 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 141 transitions. Word has length 56 [2024-11-14 05:37:26,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:37:26,407 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 141 transitions. [2024-11-14 05:37:26,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 43 states have (on average 2.372093023255814) internal successors, (102), 43 states have internal predecessors, (102), 5 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-14 05:37:26,408 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 141 transitions. [2024-11-14 05:37:26,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-14 05:37:26,408 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:37:26,409 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2024-11-14 05:37:26,422 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-14 05:37:26,613 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-14 05:37:26,613 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:37:26,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:37:26,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1907166321, now seen corresponding path program 3 times [2024-11-14 05:37:26,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:37:26,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481823111] [2024-11-14 05:37:26,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:37:26,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:37:26,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:37:27,028 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-14 05:37:27,029 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:37:27,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481823111] [2024-11-14 05:37:27,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481823111] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:37:27,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219917740] [2024-11-14 05:37:27,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:37:27,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:37:27,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:37:27,031 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:37:27,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 05:37:27,118 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:37:27,118 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:37:27,119 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-14 05:37:27,121 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:37:27,232 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-14 05:37:27,232 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:37:27,568 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-14 05:37:27,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219917740] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:37:27,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [188931262] [2024-11-14 05:37:27,570 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2024-11-14 05:37:27,572 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:37:27,573 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:37:27,573 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:37:27,573 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:37:27,961 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2024-11-14 05:37:27,967 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 11 for LOIs [2024-11-14 05:37:28,035 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:37:32,570 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6774#(and (exists ((|v_ULTIMATE.start_main_~a~0#1_46| Int)) (<= (mod |v_ULTIMATE.start_main_~a~0#1_46| 4294967296) 4294967294)) (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 05:37:32,570 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:37:32,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:37:32,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2024-11-14 05:37:32,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774815290] [2024-11-14 05:37:32,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:37:32,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-14 05:37:32,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:37:32,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-14 05:37:32,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1294, Unknown=1, NotChecked=0, Total=1406 [2024-11-14 05:37:32,572 INFO L87 Difference]: Start difference. First operand 104 states and 141 transitions. Second operand has 21 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-14 05:37:32,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:37:32,809 INFO L93 Difference]: Finished difference Result 127 states and 171 transitions. [2024-11-14 05:37:32,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-14 05:37:32,809 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 58 [2024-11-14 05:37:32,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:37:32,810 INFO L225 Difference]: With dead ends: 127 [2024-11-14 05:37:32,810 INFO L226 Difference]: Without dead ends: 120 [2024-11-14 05:37:32,811 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 145 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=117, Invalid=1364, Unknown=1, NotChecked=0, Total=1482 [2024-11-14 05:37:32,812 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 13 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:37:32,812 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 603 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:37:32,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-14 05:37:32,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 115. [2024-11-14 05:37:32,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 99 states have (on average 1.3232323232323233) internal successors, (131), 98 states have internal predecessors, (131), 9 states have call successors, (9), 4 states have call predecessors, (9), 6 states have return successors, (17), 12 states have call predecessors, (17), 8 states have call successors, (17) [2024-11-14 05:37:32,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 157 transitions. [2024-11-14 05:37:32,833 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 157 transitions. Word has length 58 [2024-11-14 05:37:32,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:37:32,833 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 157 transitions. [2024-11-14 05:37:32,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-14 05:37:32,834 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 157 transitions. [2024-11-14 05:37:32,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-14 05:37:32,834 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:37:32,834 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2024-11-14 05:37:32,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-14 05:37:33,035 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-14 05:37:33,035 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:37:33,035 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:37:33,035 INFO L85 PathProgramCache]: Analyzing trace with hash 156780935, now seen corresponding path program 1 times [2024-11-14 05:37:33,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:37:33,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162171415] [2024-11-14 05:37:33,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:37:33,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:37:33,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:37:33,388 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 05:37:33,388 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:37:33,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162171415] [2024-11-14 05:37:33,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162171415] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:37:33,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837031222] [2024-11-14 05:37:33,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:37:33,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:37:33,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:37:33,391 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:37:33,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 05:37:33,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:37:33,679 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-14 05:37:33,681 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:37:36,662 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 7 proven. 39 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-14 05:37:36,662 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:37:40,402 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 7 proven. 39 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-14 05:37:40,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837031222] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:37:40,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1628201326] [2024-11-14 05:37:40,404 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2024-11-14 05:37:40,404 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:37:40,404 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:37:40,404 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:37:40,405 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:37:40,744 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2024-11-14 05:37:40,755 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 11 for LOIs [2024-11-14 05:37:40,863 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:37:45,731 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7502#(and (exists ((|v_ULTIMATE.start_main_~a~0#1_49| Int)) (<= (mod |v_ULTIMATE.start_main_~a~0#1_49| 4294967296) 4294967294)) (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 05:37:45,731 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:37:45,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:37:45,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 21, 26] total 53 [2024-11-14 05:37:45,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226962108] [2024-11-14 05:37:45,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:37:45,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-14 05:37:45,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:37:45,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-14 05:37:45,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=4638, Unknown=0, NotChecked=0, Total=4970 [2024-11-14 05:37:45,735 INFO L87 Difference]: Start difference. First operand 115 states and 157 transitions. Second operand has 53 states, 46 states have (on average 2.217391304347826) internal successors, (102), 47 states have internal predecessors, (102), 6 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) [2024-11-14 05:38:03,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:38:03,023 INFO L93 Difference]: Finished difference Result 331 states and 530 transitions. [2024-11-14 05:38:03,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2024-11-14 05:38:03,024 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 46 states have (on average 2.217391304347826) internal successors, (102), 47 states have internal predecessors, (102), 6 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) Word has length 58 [2024-11-14 05:38:03,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:38:03,026 INFO L225 Difference]: With dead ends: 331 [2024-11-14 05:38:03,026 INFO L226 Difference]: Without dead ends: 279 [2024-11-14 05:38:03,031 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4638 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=1595, Invalid=16494, Unknown=1, NotChecked=0, Total=18090 [2024-11-14 05:38:03,031 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 401 mSDsluCounter, 844 mSDsCounter, 0 mSdLazyCounter, 2318 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 2489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 2318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2024-11-14 05:38:03,031 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [429 Valid, 874 Invalid, 2489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 2318 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2024-11-14 05:38:03,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2024-11-14 05:38:03,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 128. [2024-11-14 05:38:03,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 106 states have (on average 1.2924528301886793) internal successors, (137), 107 states have internal predecessors, (137), 13 states have call successors, (13), 4 states have call predecessors, (13), 8 states have return successors, (28), 16 states have call predecessors, (28), 12 states have call successors, (28) [2024-11-14 05:38:03,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 178 transitions. [2024-11-14 05:38:03,074 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 178 transitions. Word has length 58 [2024-11-14 05:38:03,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:38:03,075 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 178 transitions. [2024-11-14 05:38:03,075 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 46 states have (on average 2.217391304347826) internal successors, (102), 47 states have internal predecessors, (102), 6 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) [2024-11-14 05:38:03,075 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 178 transitions. [2024-11-14 05:38:03,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-14 05:38:03,076 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:38:03,076 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 3, 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] [2024-11-14 05:38:03,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-14 05:38:03,276 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:38:03,276 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:38:03,277 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:38:03,277 INFO L85 PathProgramCache]: Analyzing trace with hash 749580722, now seen corresponding path program 1 times [2024-11-14 05:38:03,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:38:03,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111181659] [2024-11-14 05:38:03,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:38:03,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:38:03,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:38:03,679 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 3 proven. 55 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-14 05:38:03,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:38:03,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111181659] [2024-11-14 05:38:03,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111181659] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:38:03,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645023925] [2024-11-14 05:38:03,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:38:03,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:38:03,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:38:03,682 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:38:03,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-14 05:38:04,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:38:04,035 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-14 05:38:04,038 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:38:05,206 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 23 proven. 45 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 05:38:05,206 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:38:07,667 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 3 proven. 55 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-14 05:38:07,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645023925] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:38:07,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1894530649] [2024-11-14 05:38:07,669 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2024-11-14 05:38:07,669 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:38:07,669 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:38:07,669 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:38:07,669 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:38:08,808 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 50 for LOIs [2024-11-14 05:38:08,825 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 46 for LOIs [2024-11-14 05:38:08,958 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:38:26,458 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8638#(and (= |__VERIFIER_assert_#in~cond| 0) (exists ((|v_ULTIMATE.start_main_~a~0#1_51| Int)) (<= (mod |v_ULTIMATE.start_main_~a~0#1_51| 4294967296) 4294967294)) (exists ((|v_ULTIMATE.start_main_~b~0#1_49| Int) (|v_ULTIMATE.start_main_~ea~2#1_BEFORE_CALL_106| Int) (|v_ULTIMATE.start_main_~one~0#1_44| Int) (|v_ULTIMATE.start_main_~eb~2#1_BEFORE_CALL_106| Int)) (and (<= 0 (+ |v_ULTIMATE.start_main_~eb~2#1_BEFORE_CALL_106| 128)) (<= 1 |#StackHeapBarrier|) (<= 0 (+ |v_ULTIMATE.start_main_~ea~2#1_BEFORE_CALL_106| 128)) (= (mod |v_ULTIMATE.start_main_~one~0#1_44| 4294967296) (mod |v_ULTIMATE.start_main_~b~0#1_49| 4294967296)) (<= |v_ULTIMATE.start_main_~ea~2#1_BEFORE_CALL_106| 127) (<= |v_ULTIMATE.start_main_~eb~2#1_BEFORE_CALL_106| 127))))' at error location [2024-11-14 05:38:26,458 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:38:26,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:38:26,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 16] total 39 [2024-11-14 05:38:26,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059978075] [2024-11-14 05:38:26,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:38:26,459 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-14 05:38:26,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:38:26,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-14 05:38:26,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=2735, Unknown=4, NotChecked=0, Total=3306 [2024-11-14 05:38:26,461 INFO L87 Difference]: Start difference. First operand 128 states and 178 transitions. Second operand has 39 states, 39 states have (on average 2.4358974358974357) internal successors, (95), 39 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:38:29,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-14 05:38:37,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:38:37,079 INFO L93 Difference]: Finished difference Result 262 states and 389 transitions. [2024-11-14 05:38:37,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-14 05:38:37,080 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.4358974358974357) internal successors, (95), 39 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 61 [2024-11-14 05:38:37,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:38:37,082 INFO L225 Difference]: With dead ends: 262 [2024-11-14 05:38:37,082 INFO L226 Difference]: Without dead ends: 205 [2024-11-14 05:38:37,083 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 142 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2097 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=1067, Invalid=4185, Unknown=4, NotChecked=0, Total=5256 [2024-11-14 05:38:37,083 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 174 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 41 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2024-11-14 05:38:37,084 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 462 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 895 Invalid, 1 Unknown, 0 Unchecked, 6.7s Time] [2024-11-14 05:38:37,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-11-14 05:38:37,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 110. [2024-11-14 05:38:37,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 95 states have internal predecessors, (118), 8 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (16), 10 states have call predecessors, (16), 7 states have call successors, (16) [2024-11-14 05:38:37,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 142 transitions. [2024-11-14 05:38:37,126 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 142 transitions. Word has length 61 [2024-11-14 05:38:37,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:38:37,126 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 142 transitions. [2024-11-14 05:38:37,126 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.4358974358974357) internal successors, (95), 39 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:38:37,126 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 142 transitions. [2024-11-14 05:38:37,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-14 05:38:37,127 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:38:37,127 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 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 05:38:37,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-14 05:38:37,330 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-14 05:38:37,330 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:38:37,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:38:37,330 INFO L85 PathProgramCache]: Analyzing trace with hash 550301768, now seen corresponding path program 2 times [2024-11-14 05:38:37,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:38:37,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952661818] [2024-11-14 05:38:37,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:38:37,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:38:37,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:38:37,575 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 3 proven. 107 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 05:38:37,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:38:37,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952661818] [2024-11-14 05:38:37,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952661818] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:38:37,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588807781] [2024-11-14 05:38:37,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:38:37,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:38:37,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:38:37,578 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:38:37,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-14 05:38:37,671 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-11-14 05:38:37,671 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:38:37,673 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-14 05:38:37,674 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:38:37,871 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 20 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 05:38:37,871 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:38:38,302 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 3 proven. 107 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 05:38:38,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588807781] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:38:38,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [345901319] [2024-11-14 05:38:38,304 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2024-11-14 05:38:38,304 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:38:38,304 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:38:38,305 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:38:38,305 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:38:38,566 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 62 for LOIs [2024-11-14 05:38:38,601 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 46 for LOIs [2024-11-14 05:38:38,682 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:38:41,013 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9590#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~eb~2#1_BEFORE_CALL_119| Int) (|v_ULTIMATE.start_main_~a~0#1_53| Int) (|v_ULTIMATE.start_main_~b~0#1_51| Int) (|v_ULTIMATE.start_mulflt_~a#1_52| Int) (|v_ULTIMATE.start_mulflt_~b#1_65| Int)) (and (<= |v_ULTIMATE.start_main_~a~0#1_53| 4294967295) (= |v_ULTIMATE.start_main_~b~0#1_51| 0) (= |v_ULTIMATE.start_main_~a~0#1_53| |v_ULTIMATE.start_mulflt_~a#1_52|) (<= 1 |v_ULTIMATE.start_main_~a~0#1_53|) (<= 0 (+ |v_ULTIMATE.start_main_~eb~2#1_BEFORE_CALL_119| 128)) (<= |v_ULTIMATE.start_main_~eb~2#1_BEFORE_CALL_119| 127) (= |v_ULTIMATE.start_main_~b~0#1_51| |v_ULTIMATE.start_mulflt_~b#1_65|))) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 05:38:41,013 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:38:41,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:38:41,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2024-11-14 05:38:41,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836145885] [2024-11-14 05:38:41,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:38:41,014 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-14 05:38:41,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:38:41,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-14 05:38:41,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=2440, Unknown=0, NotChecked=0, Total=2970 [2024-11-14 05:38:41,015 INFO L87 Difference]: Start difference. First operand 110 states and 142 transitions. Second operand has 32 states, 32 states have (on average 3.65625) internal successors, (117), 32 states have internal predecessors, (117), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-14 05:38:41,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:38:41,340 INFO L93 Difference]: Finished difference Result 263 states and 370 transitions. [2024-11-14 05:38:41,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-14 05:38:41,341 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.65625) internal successors, (117), 32 states have internal predecessors, (117), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 63 [2024-11-14 05:38:41,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:38:41,342 INFO L225 Difference]: With dead ends: 263 [2024-11-14 05:38:41,343 INFO L226 Difference]: Without dead ends: 211 [2024-11-14 05:38:41,343 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1641 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=563, Invalid=2517, Unknown=0, NotChecked=0, Total=3080 [2024-11-14 05:38:41,344 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 104 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:38:41,344 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 287 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:38:41,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2024-11-14 05:38:41,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 124. [2024-11-14 05:38:41,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 109 states have (on average 1.201834862385321) internal successors, (131), 109 states have internal predecessors, (131), 8 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (16), 10 states have call predecessors, (16), 7 states have call successors, (16) [2024-11-14 05:38:41,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 155 transitions. [2024-11-14 05:38:41,379 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 155 transitions. Word has length 63 [2024-11-14 05:38:41,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:38:41,380 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 155 transitions. [2024-11-14 05:38:41,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.65625) internal successors, (117), 32 states have internal predecessors, (117), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-14 05:38:41,380 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 155 transitions. [2024-11-14 05:38:41,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-14 05:38:41,381 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:38:41,381 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 13, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:38:41,401 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-14 05:38:41,582 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-14 05:38:41,582 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:38:41,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:38:41,583 INFO L85 PathProgramCache]: Analyzing trace with hash 432215353, now seen corresponding path program 3 times [2024-11-14 05:38:41,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:38:41,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92805597] [2024-11-14 05:38:41,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:38:41,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:38:41,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:38:42,411 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 3 proven. 280 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 05:38:42,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:38:42,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92805597] [2024-11-14 05:38:42,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92805597] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:38:42,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851217215] [2024-11-14 05:38:42,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:38:42,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:38:42,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:38:42,414 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:38:42,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-14 05:38:42,945 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:38:42,945 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:38:42,946 INFO L255 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-14 05:38:42,949 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:38:45,285 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 5 proven. 282 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 05:38:45,285 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:38:50,195 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 7 proven. 280 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 05:38:50,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851217215] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:38:50,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1852985334] [2024-11-14 05:38:50,197 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2024-11-14 05:38:50,197 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:38:50,197 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:38:50,197 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:38:50,197 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:38:50,381 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 75 for LOIs [2024-11-14 05:38:50,425 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 11 for LOIs [2024-11-14 05:38:50,493 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:38:57,150 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10672#(and (= (select |#length| 3) 12) (exists ((|v_ULTIMATE.start_mulflt_~a#1_55| Int) (|v_ULTIMATE.start_main_~a~0#1_55| Int) (|v_ULTIMATE.start_main_~one~0#1_49| Int) (|v_ULTIMATE.start_main_~b~0#1_54| Int) (|v_ULTIMATE.start_mulflt_~b#1_69| Int)) (and (= |v_ULTIMATE.start_main_~b~0#1_54| |v_ULTIMATE.start_mulflt_~b#1_69|) (<= 1 (mod |v_ULTIMATE.start_main_~a~0#1_55| 4294967296)) (= (mod |v_ULTIMATE.start_main_~one~0#1_49| 4294967296) (mod |v_ULTIMATE.start_main_~b~0#1_54| 4294967296)) (= (mod |v_ULTIMATE.start_mulflt_~b#1_69| 4294967296) 0) (= |v_ULTIMATE.start_main_~a~0#1_55| |v_ULTIMATE.start_mulflt_~a#1_55|))) (<= 1 |#StackHeapBarrier|) (= 22 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| 0) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0))' at error location [2024-11-14 05:38:57,150 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:38:57,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:38:57,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 32, 34] total 81 [2024-11-14 05:38:57,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715790581] [2024-11-14 05:38:57,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:38:57,151 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2024-11-14 05:38:57,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:38:57,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2024-11-14 05:38:57,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=754, Invalid=8557, Unknown=1, NotChecked=0, Total=9312 [2024-11-14 05:38:57,154 INFO L87 Difference]: Start difference. First operand 124 states and 155 transitions. Second operand has 81 states, 75 states have (on average 2.3733333333333335) internal successors, (178), 76 states have internal predecessors, (178), 6 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) [2024-11-14 05:39:55,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:39:55,042 INFO L93 Difference]: Finished difference Result 467 states and 740 transitions. [2024-11-14 05:39:55,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2024-11-14 05:39:55,043 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 75 states have (on average 2.3733333333333335) internal successors, (178), 76 states have internal predecessors, (178), 6 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) Word has length 80 [2024-11-14 05:39:55,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:39:55,047 INFO L225 Difference]: With dead ends: 467 [2024-11-14 05:39:55,048 INFO L226 Difference]: Without dead ends: 412 [2024-11-14 05:39:55,053 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15799 ImplicationChecksByTransitivity, 59.9s TimeCoverageRelationStatistics Valid=8812, Invalid=46647, Unknown=1, NotChecked=0, Total=55460 [2024-11-14 05:39:55,054 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 1313 mSDsluCounter, 1582 mSDsCounter, 0 mSdLazyCounter, 6201 mSolverCounterSat, 580 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1337 SdHoareTripleChecker+Valid, 1618 SdHoareTripleChecker+Invalid, 6781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 580 IncrementalHoareTripleChecker+Valid, 6201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:39:55,055 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1337 Valid, 1618 Invalid, 6781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [580 Valid, 6201 Invalid, 0 Unknown, 0 Unchecked, 10.1s Time] [2024-11-14 05:39:55,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2024-11-14 05:39:55,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 165. [2024-11-14 05:39:55,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 147 states have (on average 1.2993197278911566) internal successors, (191), 148 states have internal predecessors, (191), 10 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (21), 12 states have call predecessors, (21), 9 states have call successors, (21) [2024-11-14 05:39:55,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 222 transitions. [2024-11-14 05:39:55,155 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 222 transitions. Word has length 80 [2024-11-14 05:39:55,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:39:55,156 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 222 transitions. [2024-11-14 05:39:55,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 75 states have (on average 2.3733333333333335) internal successors, (178), 76 states have internal predecessors, (178), 6 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) [2024-11-14 05:39:55,157 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 222 transitions. [2024-11-14 05:39:55,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-14 05:39:55,158 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:39:55,158 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 14, 4, 4, 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] [2024-11-14 05:39:55,180 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-14 05:39:55,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-14 05:39:55,362 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:39:55,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:39:55,362 INFO L85 PathProgramCache]: Analyzing trace with hash 984702008, now seen corresponding path program 2 times [2024-11-14 05:39:55,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:39:55,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380106611] [2024-11-14 05:39:55,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:39:55,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:39:55,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:39:56,923 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 3 proven. 323 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 05:39:56,923 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:39:56,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380106611] [2024-11-14 05:39:56,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380106611] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:39:56,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509536965] [2024-11-14 05:39:56,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:39:56,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:39:56,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:39:56,926 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:39:56,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-14 05:39:57,232 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2024-11-14 05:39:57,232 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:39:57,234 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-14 05:39:57,236 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:39:59,632 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 2 proven. 332 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 05:39:59,632 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:40:03,949 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 7 proven. 323 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 05:40:03,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509536965] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:40:03,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2089677701] [2024-11-14 05:40:03,950 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2024-11-14 05:40:03,950 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:40:03,951 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:40:03,951 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:40:03,951 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:40:04,961 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 123 for LOIs [2024-11-14 05:40:05,091 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 46 for LOIs [2024-11-14 05:40:05,180 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:40:35,430 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12364#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~one~0#1_52| Int) (|v_ULTIMATE.start_mulflt_~b#1_72| Int) (|v_ULTIMATE.start_main_~b~0#1_57| Int) (|v_ULTIMATE.start_mulflt_~a#1_58| Int) (|v_ULTIMATE.start_main_~mb~2#1_BEFORE_CALL_34| Int) (|v_ULTIMATE.start_main_~a~0#1_57| Int) (|v_ULTIMATE.start_main_~eb~2#1_BEFORE_CALL_145| Int)) (and (= |v_ULTIMATE.start_main_~a~0#1_57| |v_ULTIMATE.start_mulflt_~a#1_58|) (<= 0 (+ |v_ULTIMATE.start_main_~eb~2#1_BEFORE_CALL_145| 128)) (<= 1 (mod |v_ULTIMATE.start_main_~a~0#1_57| 4294967296)) (<= |v_ULTIMATE.start_main_~eb~2#1_BEFORE_CALL_145| 127) (= |v_ULTIMATE.start_main_~b~0#1_57| |v_ULTIMATE.start_mulflt_~b#1_72|) (= (mod |v_ULTIMATE.start_mulflt_~b#1_72| 4294967296) 0) (or (exists ((v_base2flt_~m_50 Int) (v_base2flt_~m_565 Int) (v_base2flt_~e_528 Int)) (and (= |v_ULTIMATE.start_main_~b~0#1_57| (* 16777216 (mod (+ v_base2flt_~e_528 128) 4294967296))) (or (and (<= 16777216 (mod v_base2flt_~m_565 4294967296)) (= v_base2flt_~e_528 |v_ULTIMATE.start_main_~eb~2#1_BEFORE_CALL_145|) (= v_base2flt_~m_565 |v_ULTIMATE.start_main_~mb~2#1_BEFORE_CALL_34|) (<= (mod v_base2flt_~m_565 4294967296) 33554431)) (and (<= 16777216 (mod v_base2flt_~m_565 4294967296)) (<= 0 (+ v_base2flt_~e_528 128)) (exists ((v_base2flt_~m_564 Int)) (= v_base2flt_~m_565 (* (mod v_base2flt_~m_564 4294967296) 2))))) (= (mod v_base2flt_~m_50 4294967296) 0))) (and (= |v_ULTIMATE.start_main_~b~0#1_57| 0) (= 0 (mod |v_ULTIMATE.start_main_~mb~2#1_BEFORE_CALL_34| 4294967296)))) (= (mod |v_ULTIMATE.start_main_~b~0#1_57| 4294967296) (mod |v_ULTIMATE.start_main_~one~0#1_52| 4294967296)))) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 05:40:35,430 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:40:35,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:40:35,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 31, 31] total 77 [2024-11-14 05:40:35,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652146236] [2024-11-14 05:40:35,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:40:35,431 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-11-14 05:40:35,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:40:35,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-11-14 05:40:35,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=687, Invalid=8428, Unknown=5, NotChecked=0, Total=9120 [2024-11-14 05:40:35,433 INFO L87 Difference]: Start difference. First operand 165 states and 222 transitions. Second operand has 77 states, 73 states have (on average 2.6027397260273974) internal successors, (190), 72 states have internal predecessors, (190), 4 states have call successors, (10), 3 states have call predecessors, (10), 7 states have return successors, (11), 8 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-14 05:40:57,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:40:57,001 INFO L93 Difference]: Finished difference Result 474 states and 722 transitions. [2024-11-14 05:40:57,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2024-11-14 05:40:57,002 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 73 states have (on average 2.6027397260273974) internal successors, (190), 72 states have internal predecessors, (190), 4 states have call successors, (10), 3 states have call predecessors, (10), 7 states have return successors, (11), 8 states have call predecessors, (11), 4 states have call successors, (11) Word has length 83 [2024-11-14 05:40:57,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:40:57,006 INFO L225 Difference]: With dead ends: 474 [2024-11-14 05:40:57,006 INFO L226 Difference]: Without dead ends: 421 [2024-11-14 05:40:57,009 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6404 ImplicationChecksByTransitivity, 50.2s TimeCoverageRelationStatistics Valid=4327, Invalid=25770, Unknown=5, NotChecked=0, Total=30102 [2024-11-14 05:40:57,010 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 1047 mSDsluCounter, 1735 mSDsCounter, 0 mSdLazyCounter, 4594 mSolverCounterSat, 728 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1055 SdHoareTripleChecker+Valid, 1774 SdHoareTripleChecker+Invalid, 5322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 728 IncrementalHoareTripleChecker+Valid, 4594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:40:57,010 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1055 Valid, 1774 Invalid, 5322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [728 Valid, 4594 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2024-11-14 05:40:57,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2024-11-14 05:40:57,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 180. [2024-11-14 05:40:57,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 158 states have (on average 1.2974683544303798) internal successors, (205), 160 states have internal predecessors, (205), 13 states have call successors, (13), 4 states have call predecessors, (13), 8 states have return successors, (28), 15 states have call predecessors, (28), 12 states have call successors, (28) [2024-11-14 05:40:57,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 246 transitions. [2024-11-14 05:40:57,072 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 246 transitions. Word has length 83 [2024-11-14 05:40:57,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:40:57,072 INFO L471 AbstractCegarLoop]: Abstraction has 180 states and 246 transitions. [2024-11-14 05:40:57,073 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 73 states have (on average 2.6027397260273974) internal successors, (190), 72 states have internal predecessors, (190), 4 states have call successors, (10), 3 states have call predecessors, (10), 7 states have return successors, (11), 8 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-14 05:40:57,073 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 246 transitions. [2024-11-14 05:40:57,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-14 05:40:57,074 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:40:57,074 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 15, 4, 4, 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] [2024-11-14 05:40:57,097 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-14 05:40:57,275 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:40:57,275 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:40:57,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:40:57,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1769958547, now seen corresponding path program 2 times [2024-11-14 05:40:57,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:40:57,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934643733] [2024-11-14 05:40:57,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:40:57,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:40:57,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:40:58,323 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 3 proven. 369 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 05:40:58,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:40:58,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934643733] [2024-11-14 05:40:58,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934643733] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:40:58,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136119633] [2024-11-14 05:40:58,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:40:58,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:40:58,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:40:58,326 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:40:58,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-14 05:40:58,403 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-14 05:40:58,403 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:40:58,404 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-14 05:40:58,406 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:40:58,796 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2024-11-14 05:40:58,796 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:40:58,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136119633] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:40:58,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:40:58,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [21] total 30 [2024-11-14 05:40:58,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676412536] [2024-11-14 05:40:58,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:40:58,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-14 05:40:58,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:40:58,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-14 05:40:58,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2024-11-14 05:40:58,797 INFO L87 Difference]: Start difference. First operand 180 states and 246 transitions. Second operand has 11 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-14 05:40:59,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:40:59,165 INFO L93 Difference]: Finished difference Result 193 states and 260 transitions. [2024-11-14 05:40:59,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-14 05:40:59,165 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 90 [2024-11-14 05:40:59,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:40:59,166 INFO L225 Difference]: With dead ends: 193 [2024-11-14 05:40:59,167 INFO L226 Difference]: Without dead ends: 186 [2024-11-14 05:40:59,167 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2024-11-14 05:40:59,167 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:40:59,167 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 377 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 05:40:59,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2024-11-14 05:40:59,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 182. [2024-11-14 05:40:59,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 160 states have (on average 1.29375) internal successors, (207), 161 states have internal predecessors, (207), 13 states have call successors, (13), 4 states have call predecessors, (13), 8 states have return successors, (28), 16 states have call predecessors, (28), 12 states have call successors, (28) [2024-11-14 05:40:59,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 248 transitions. [2024-11-14 05:40:59,240 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 248 transitions. Word has length 90 [2024-11-14 05:40:59,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:40:59,241 INFO L471 AbstractCegarLoop]: Abstraction has 182 states and 248 transitions. [2024-11-14 05:40:59,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-14 05:40:59,241 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 248 transitions. [2024-11-14 05:40:59,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-14 05:40:59,242 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:40:59,242 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 15, 4, 4, 3, 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] [2024-11-14 05:40:59,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-14 05:40:59,443 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2024-11-14 05:40:59,443 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:40:59,444 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:40:59,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1145601731, now seen corresponding path program 3 times [2024-11-14 05:40:59,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:40:59,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088091327] [2024-11-14 05:40:59,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:40:59,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:40:59,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:41:00,503 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 3 proven. 370 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-14 05:41:00,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:41:00,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088091327] [2024-11-14 05:41:00,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088091327] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:41:00,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406111003] [2024-11-14 05:41:00,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:41:00,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:41:00,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:41:00,505 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:41:00,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-14 05:41:00,657 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:41:00,657 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:41:00,658 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-14 05:41:00,661 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:41:02,989 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 3 proven. 370 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-14 05:41:02,990 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:41:07,232 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 3 proven. 370 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-14 05:41:07,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406111003] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:41:07,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [734896059] [2024-11-14 05:41:07,234 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2024-11-14 05:41:07,234 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:41:07,234 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:41:07,234 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:41:07,234 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:41:08,409 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 123 for LOIs [2024-11-14 05:41:08,518 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 46 for LOIs [2024-11-14 05:41:08,622 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:41:37,593 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14802#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (exists ((|v_ULTIMATE.start_main_~a~0#1_61| Int) (|v_ULTIMATE.start_main_~mb~2#1_BEFORE_CALL_38| Int) (|v_ULTIMATE.start_main_~eb~2#1_BEFORE_CALL_158| Int) (|v_ULTIMATE.start_mulflt_~a#1_61| Int) (|v_ULTIMATE.start_main_~b~0#1_60| Int) (|v_ULTIMATE.start_mulflt_~b#1_77| Int) (|v_ULTIMATE.start_main_~one~0#1_55| Int)) (and (= |v_ULTIMATE.start_main_~a~0#1_61| |v_ULTIMATE.start_mulflt_~a#1_61|) (<= |v_ULTIMATE.start_main_~eb~2#1_BEFORE_CALL_158| 127) (<= 0 (+ |v_ULTIMATE.start_main_~eb~2#1_BEFORE_CALL_158| 128)) (= |v_ULTIMATE.start_main_~b~0#1_60| |v_ULTIMATE.start_mulflt_~b#1_77|) (or (exists ((v_base2flt_~m_646 Int) (v_base2flt_~m_50 Int) (v_base2flt_~e_603 Int)) (and (or (and (= v_base2flt_~m_646 |v_ULTIMATE.start_main_~mb~2#1_BEFORE_CALL_38|) (<= (mod v_base2flt_~m_646 4294967296) 33554431) (<= 16777216 (mod v_base2flt_~m_646 4294967296)) (= v_base2flt_~e_603 |v_ULTIMATE.start_main_~eb~2#1_BEFORE_CALL_158|)) (and (<= 0 (+ v_base2flt_~e_603 128)) (<= 16777216 (mod v_base2flt_~m_646 4294967296)) (exists ((v_base2flt_~m_645 Int)) (= v_base2flt_~m_646 (* 2 (mod v_base2flt_~m_645 4294967296)))))) (= |v_ULTIMATE.start_main_~b~0#1_60| (* (mod (+ v_base2flt_~e_603 128) 4294967296) 16777216)) (= (mod v_base2flt_~m_50 4294967296) 0))) (and (= (mod |v_ULTIMATE.start_main_~mb~2#1_BEFORE_CALL_38| 4294967296) 0) (= |v_ULTIMATE.start_main_~b~0#1_60| 0))) (<= 1 (mod |v_ULTIMATE.start_main_~a~0#1_61| 4294967296)) (= (mod |v_ULTIMATE.start_main_~b~0#1_60| 4294967296) (mod |v_ULTIMATE.start_main_~one~0#1_55| 4294967296)) (= (mod |v_ULTIMATE.start_mulflt_~b#1_77| 4294967296) 0))))' at error location [2024-11-14 05:41:37,593 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:41:37,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:41:37,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 31, 31] total 76 [2024-11-14 05:41:37,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63095866] [2024-11-14 05:41:37,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:41:37,594 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2024-11-14 05:41:37,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:41:37,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2024-11-14 05:41:37,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=704, Invalid=8220, Unknown=6, NotChecked=0, Total=8930 [2024-11-14 05:41:37,596 INFO L87 Difference]: Start difference. First operand 182 states and 248 transitions. Second operand has 76 states, 73 states have (on average 2.6301369863013697) internal successors, (192), 73 states have internal predecessors, (192), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-14 05:42:29,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:42:29,417 INFO L93 Difference]: Finished difference Result 538 states and 875 transitions. [2024-11-14 05:42:29,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2024-11-14 05:42:29,418 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 73 states have (on average 2.6301369863013697) internal successors, (192), 73 states have internal predecessors, (192), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) Word has length 90 [2024-11-14 05:42:29,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:42:29,422 INFO L225 Difference]: With dead ends: 538 [2024-11-14 05:42:29,422 INFO L226 Difference]: Without dead ends: 482 [2024-11-14 05:42:29,425 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 212 SyntacticMatches, 3 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10538 ImplicationChecksByTransitivity, 73.3s TimeCoverageRelationStatistics Valid=5773, Invalid=37277, Unknown=6, NotChecked=0, Total=43056 [2024-11-14 05:42:29,426 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 1421 mSDsluCounter, 1753 mSDsCounter, 0 mSdLazyCounter, 6900 mSolverCounterSat, 594 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1421 SdHoareTripleChecker+Valid, 1793 SdHoareTripleChecker+Invalid, 7494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 594 IncrementalHoareTripleChecker+Valid, 6900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:42:29,426 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1421 Valid, 1793 Invalid, 7494 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [594 Valid, 6900 Invalid, 0 Unknown, 0 Unchecked, 12.0s Time] [2024-11-14 05:42:29,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2024-11-14 05:42:29,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 181. [2024-11-14 05:42:29,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 162 states have (on average 1.308641975308642) internal successors, (212), 162 states have internal predecessors, (212), 11 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (23), 14 states have call predecessors, (23), 10 states have call successors, (23) [2024-11-14 05:42:29,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 246 transitions. [2024-11-14 05:42:29,534 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 246 transitions. Word has length 90 [2024-11-14 05:42:29,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:42:29,534 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 246 transitions. [2024-11-14 05:42:29,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 73 states have (on average 2.6301369863013697) internal successors, (192), 73 states have internal predecessors, (192), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-14 05:42:29,534 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 246 transitions. [2024-11-14 05:42:29,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-14 05:42:29,535 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:42:29,535 INFO L215 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 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 05:42:29,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-14 05:42:29,735 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-14 05:42:29,736 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:42:29,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:42:29,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1915441384, now seen corresponding path program 3 times [2024-11-14 05:42:29,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:42:29,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312508550] [2024-11-14 05:42:29,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:42:29,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:42:29,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:42:30,333 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 3 proven. 502 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 05:42:30,333 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:42:30,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312508550] [2024-11-14 05:42:30,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312508550] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:42:30,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088026226] [2024-11-14 05:42:30,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:42:30,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:42:30,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:42:30,337 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:42:30,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-14 05:42:30,424 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:42:30,424 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:42:30,425 INFO L255 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-14 05:42:30,426 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:42:30,915 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 20 proven. 495 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 05:42:30,915 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:42:32,149 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 3 proven. 502 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 05:42:32,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088026226] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:42:32,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1402229156] [2024-11-14 05:42:32,150 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2024-11-14 05:42:32,150 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:42:32,150 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:42:32,150 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:42:32,150 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:42:32,360 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 62 for LOIs [2024-11-14 05:42:32,389 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 46 for LOIs [2024-11-14 05:42:32,487 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:42:35,212 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16610#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_mulflt_~a#1_64| Int) (|v_ULTIMATE.start_main_~eb~2#1_BEFORE_CALL_171| Int) (|v_ULTIMATE.start_main_~a~0#1_63| Int) (|v_ULTIMATE.start_mulflt_~b#1_80| Int) (|v_ULTIMATE.start_main_~b~0#1_62| Int)) (and (<= 1 |v_ULTIMATE.start_main_~a~0#1_63|) (<= 0 (+ |v_ULTIMATE.start_main_~eb~2#1_BEFORE_CALL_171| 128)) (<= |v_ULTIMATE.start_main_~a~0#1_63| 4294967295) (= 0 |v_ULTIMATE.start_mulflt_~b#1_80|) (<= |v_ULTIMATE.start_main_~eb~2#1_BEFORE_CALL_171| 127) (= |v_ULTIMATE.start_main_~b~0#1_62| 0) (= |v_ULTIMATE.start_main_~a~0#1_63| |v_ULTIMATE.start_mulflt_~a#1_64|))) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 05:42:35,212 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:42:35,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:42:35,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 62 [2024-11-14 05:42:35,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386211534] [2024-11-14 05:42:35,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:42:35,213 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-11-14 05:42:35,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:42:35,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-11-14 05:42:35,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1600, Invalid=5540, Unknown=0, NotChecked=0, Total=7140 [2024-11-14 05:42:35,214 INFO L87 Difference]: Start difference. First operand 181 states and 246 transitions. Second operand has 62 states, 62 states have (on average 3.338709677419355) internal successors, (207), 62 states have internal predecessors, (207), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-14 05:42:35,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:42:35,986 INFO L93 Difference]: Finished difference Result 430 states and 613 transitions. [2024-11-14 05:42:35,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-14 05:42:35,987 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.338709677419355) internal successors, (207), 62 states have internal predecessors, (207), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 93 [2024-11-14 05:42:35,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:42:35,989 INFO L225 Difference]: With dead ends: 430 [2024-11-14 05:42:35,989 INFO L226 Difference]: Without dead ends: 378 [2024-11-14 05:42:35,990 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4031 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1663, Invalid=5647, Unknown=0, NotChecked=0, Total=7310 [2024-11-14 05:42:35,992 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 196 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:42:35,993 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 299 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 05:42:35,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2024-11-14 05:42:36,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 195. [2024-11-14 05:42:36,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 176 states have (on average 1.2215909090909092) internal successors, (215), 176 states have internal predecessors, (215), 11 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (23), 14 states have call predecessors, (23), 10 states have call successors, (23) [2024-11-14 05:42:36,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 249 transitions. [2024-11-14 05:42:36,087 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 249 transitions. Word has length 93 [2024-11-14 05:42:36,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:42:36,088 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 249 transitions. [2024-11-14 05:42:36,088 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.338709677419355) internal successors, (207), 62 states have internal predecessors, (207), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-14 05:42:36,088 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 249 transitions. [2024-11-14 05:42:36,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-11-14 05:42:36,091 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:42:36,091 INFO L215 NwaCegarLoop]: trace histogram [17, 17, 16, 4, 4, 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] [2024-11-14 05:42:36,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-14 05:42:36,292 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-14 05:42:36,292 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:42:36,292 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:42:36,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1221351623, now seen corresponding path program 2 times [2024-11-14 05:42:36,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:42:36,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093454363] [2024-11-14 05:42:36,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:42:36,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:42:36,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:42:37,702 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 3 proven. 417 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 05:42:37,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:42:37,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093454363] [2024-11-14 05:42:37,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093454363] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:42:37,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259417842] [2024-11-14 05:42:37,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:42:37,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:42:37,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:42:37,704 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:42:37,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-14 05:42:37,951 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2024-11-14 05:42:37,951 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:42:37,953 INFO L255 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-11-14 05:42:37,956 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:42:40,734 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 7 proven. 417 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-14 05:42:40,735 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:42:46,193 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 7 proven. 417 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-14 05:42:46,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259417842] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:42:46,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2068835707] [2024-11-14 05:42:46,195 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2024-11-14 05:42:46,195 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:42:46,195 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:42:46,196 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:42:46,196 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:42:46,526 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2024-11-14 05:42:46,538 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 11 for LOIs [2024-11-14 05:42:46,657 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:42:54,067 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18083#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~a~0#1_65| Int)) (<= (mod |v_ULTIMATE.start_main_~a~0#1_65| 4294967296) 4294967294)) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 05:42:54,067 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:42:54,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:42:54,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 31, 33] total 82 [2024-11-14 05:42:54,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318073494] [2024-11-14 05:42:54,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:42:54,069 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2024-11-14 05:42:54,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:42:54,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2024-11-14 05:42:54,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=9157, Unknown=0, NotChecked=0, Total=9900 [2024-11-14 05:42:54,072 INFO L87 Difference]: Start difference. First operand 195 states and 249 transitions. Second operand has 82 states, 78 states have (on average 2.6923076923076925) internal successors, (210), 77 states have internal predecessors, (210), 4 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-14 05:44:15,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:44:15,339 INFO L93 Difference]: Finished difference Result 569 states and 895 transitions. [2024-11-14 05:44:15,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2024-11-14 05:44:15,342 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 78 states have (on average 2.6923076923076925) internal successors, (210), 77 states have internal predecessors, (210), 4 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) Word has length 94 [2024-11-14 05:44:15,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:44:15,346 INFO L225 Difference]: With dead ends: 569 [2024-11-14 05:44:15,346 INFO L226 Difference]: Without dead ends: 505 [2024-11-14 05:44:15,350 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16511 ImplicationChecksByTransitivity, 73.9s TimeCoverageRelationStatistics Valid=8128, Invalid=55124, Unknown=0, NotChecked=0, Total=63252 [2024-11-14 05:44:15,351 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 1836 mSDsluCounter, 2133 mSDsCounter, 0 mSdLazyCounter, 8867 mSolverCounterSat, 724 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1858 SdHoareTripleChecker+Valid, 2175 SdHoareTripleChecker+Invalid, 9591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 724 IncrementalHoareTripleChecker+Valid, 8867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:44:15,351 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1858 Valid, 2175 Invalid, 9591 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [724 Valid, 8867 Invalid, 0 Unknown, 0 Unchecked, 21.0s Time] [2024-11-14 05:44:15,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2024-11-14 05:44:15,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 198. [2024-11-14 05:44:15,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 178 states have (on average 1.2134831460674158) internal successors, (216), 178 states have internal predecessors, (216), 12 states have call successors, (12), 4 states have call predecessors, (12), 7 states have return successors, (22), 15 states have call predecessors, (22), 11 states have call successors, (22) [2024-11-14 05:44:15,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 250 transitions. [2024-11-14 05:44:15,476 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 250 transitions. Word has length 94 [2024-11-14 05:44:15,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:44:15,476 INFO L471 AbstractCegarLoop]: Abstraction has 198 states and 250 transitions. [2024-11-14 05:44:15,477 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 78 states have (on average 2.6923076923076925) internal successors, (210), 77 states have internal predecessors, (210), 4 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-14 05:44:15,477 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 250 transitions. [2024-11-14 05:44:15,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-11-14 05:44:15,478 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:44:15,478 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 17, 4, 4, 3, 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] [2024-11-14 05:44:15,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-14 05:44:15,678 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:44:15,678 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:44:15,679 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:44:15,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1336433266, now seen corresponding path program 2 times [2024-11-14 05:44:15,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:44:15,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835405218] [2024-11-14 05:44:15,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:44:15,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:44:15,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:44:16,992 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 3 proven. 469 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-14 05:44:16,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:44:16,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835405218] [2024-11-14 05:44:16,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835405218] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:44:16,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335441850] [2024-11-14 05:44:16,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:44:16,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:44:16,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:44:16,994 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:44:16,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-14 05:44:17,560 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2024-11-14 05:44:17,560 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:44:17,562 INFO L255 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-14 05:44:17,564 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:44:23,820 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 23 proven. 459 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 05:44:23,820 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:44:47,516 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 3 proven. 469 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-14 05:44:47,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335441850] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:44:47,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1022761873] [2024-11-14 05:44:47,517 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2024-11-14 05:44:47,517 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:44:47,517 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:44:47,518 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:44:47,518 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:44:48,474 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 50 for LOIs [2024-11-14 05:44:48,507 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 46 for LOIs [2024-11-14 05:44:48,598 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:45:12,560 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20085#(and (= |__VERIFIER_assert_#in~cond| 0) (exists ((|v_ULTIMATE.start_main_~a~0#1_67| Int)) (<= (mod |v_ULTIMATE.start_main_~a~0#1_67| 4294967296) 4294967294)) (exists ((|v_ULTIMATE.start_main_~one~0#1_62| Int) (|v_ULTIMATE.start_main_~eb~2#1_BEFORE_CALL_197| Int) (|v_ULTIMATE.start_main_~b~0#1_67| Int) (|v_ULTIMATE.start_main_~ea~2#1_BEFORE_CALL_197| Int)) (and (<= 1 |#StackHeapBarrier|) (<= |v_ULTIMATE.start_main_~eb~2#1_BEFORE_CALL_197| 127) (<= 0 (+ |v_ULTIMATE.start_main_~eb~2#1_BEFORE_CALL_197| 128)) (<= 0 (+ |v_ULTIMATE.start_main_~ea~2#1_BEFORE_CALL_197| 128)) (<= |v_ULTIMATE.start_main_~ea~2#1_BEFORE_CALL_197| 127) (= (mod |v_ULTIMATE.start_main_~b~0#1_67| 4294967296) (mod |v_ULTIMATE.start_main_~one~0#1_62| 4294967296)))))' at error location [2024-11-14 05:45:12,560 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:45:12,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:45:12,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 41, 40] total 99 [2024-11-14 05:45:12,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547960005] [2024-11-14 05:45:12,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:45:12,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2024-11-14 05:45:12,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:45:12,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2024-11-14 05:45:12,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2601, Invalid=11200, Unknown=5, NotChecked=0, Total=13806 [2024-11-14 05:45:12,562 INFO L87 Difference]: Start difference. First operand 198 states and 250 transitions. Second operand has 99 states, 99 states have (on average 2.0505050505050506) internal successors, (203), 99 states have internal predecessors, (203), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:45:19,390 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-14 05:45:47,829 WARN L286 SmtUtils]: Spent 11.94s on a formula simplification. DAG size of input: 122 DAG size of output: 56 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:46:06,645 WARN L286 SmtUtils]: Spent 8.90s on a formula simplification. DAG size of input: 116 DAG size of output: 37 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:46:23,957 WARN L286 SmtUtils]: Spent 8.78s on a formula simplification. DAG size of input: 110 DAG size of output: 38 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:46:39,851 WARN L286 SmtUtils]: Spent 7.31s on a formula simplification. DAG size of input: 104 DAG size of output: 57 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:46:49,648 WARN L286 SmtUtils]: Spent 7.92s on a formula simplification. DAG size of input: 98 DAG size of output: 47 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:47:02,262 WARN L286 SmtUtils]: Spent 5.06s on a formula simplification. DAG size of input: 124 DAG size of output: 36 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:47:58,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:47:58,341 INFO L93 Difference]: Finished difference Result 490 states and 781 transitions. [2024-11-14 05:47:58,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2024-11-14 05:47:58,342 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.0505050505050506) internal successors, (203), 99 states have internal predecessors, (203), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 97 [2024-11-14 05:47:58,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:47:58,345 INFO L225 Difference]: With dead ends: 490 [2024-11-14 05:47:58,345 INFO L226 Difference]: Without dead ends: 415 [2024-11-14 05:47:58,347 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 214 SyntacticMatches, 2 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9267 ImplicationChecksByTransitivity, 170.5s TimeCoverageRelationStatistics Valid=5432, Invalid=19684, Unknown=6, NotChecked=0, Total=25122 [2024-11-14 05:47:58,347 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 830 mSDsluCounter, 1543 mSDsCounter, 0 mSdLazyCounter, 3934 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 830 SdHoareTripleChecker+Valid, 1608 SdHoareTripleChecker+Invalid, 4095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 3934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:47:58,348 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [830 Valid, 1608 Invalid, 4095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 3934 Invalid, 0 Unknown, 0 Unchecked, 44.4s Time] [2024-11-14 05:47:58,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2024-11-14 05:47:58,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 197. [2024-11-14 05:47:58,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 177 states have (on average 1.1073446327683616) internal successors, (196), 177 states have internal predecessors, (196), 12 states have call successors, (12), 4 states have call predecessors, (12), 7 states have return successors, (22), 15 states have call predecessors, (22), 11 states have call successors, (22) [2024-11-14 05:47:58,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 230 transitions. [2024-11-14 05:47:58,476 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 230 transitions. Word has length 97 [2024-11-14 05:47:58,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:47:58,476 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 230 transitions. [2024-11-14 05:47:58,476 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.0505050505050506) internal successors, (203), 99 states have internal predecessors, (203), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:47:58,477 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 230 transitions. [2024-11-14 05:47:58,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-11-14 05:47:58,477 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:47:58,478 INFO L215 NwaCegarLoop]: trace histogram [24, 24, 23, 4, 4, 3, 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] [2024-11-14 05:47:58,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-14 05:47:58,678 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:47:58,678 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:47:58,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:47:58,678 INFO L85 PathProgramCache]: Analyzing trace with hash -654136622, now seen corresponding path program 3 times [2024-11-14 05:47:58,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:47:58,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375543538] [2024-11-14 05:47:58,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:58,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:47:59,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-14 05:47:59,246 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-14 05:47:59,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-14 05:47:59,895 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2024-11-14 05:47:59,896 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-14 05:47:59,897 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-14 05:47:59,899 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-11-14 05:47:59,903 INFO L407 BasicCegarLoop]: Path program histogram: [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-14 05:47:59,964 INFO L173 ceAbstractionStarter]: Computing trace abstraction results [2024-11-14 05:47:59,972 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.11 05:47:59 BoogieIcfgContainer [2024-11-14 05:47:59,972 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-14 05:47:59,973 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-14 05:47:59,974 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-14 05:47:59,974 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-14 05:47:59,975 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 05:36:20" (3/4) ... [2024-11-14 05:47:59,977 INFO L145 WitnessPrinter]: No result that supports witness generation found [2024-11-14 05:47:59,978 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-14 05:47:59,980 INFO L158 Benchmark]: Toolchain (without parser) took 700392.09ms. Allocated memory was 117.4MB in the beginning and 637.5MB in the end (delta: 520.1MB). Free memory was 92.7MB in the beginning and 496.2MB in the end (delta: -403.5MB). Peak memory consumption was 116.1MB. Max. memory is 16.1GB. [2024-11-14 05:47:59,980 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 117.4MB. Free memory is still 74.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 05:47:59,980 INFO L158 Benchmark]: CACSL2BoogieTranslator took 368.47ms. Allocated memory is still 117.4MB. Free memory was 92.5MB in the beginning and 79.1MB in the end (delta: 13.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-14 05:47:59,981 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.77ms. Allocated memory is still 117.4MB. Free memory was 79.1MB in the beginning and 77.5MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 05:47:59,981 INFO L158 Benchmark]: Boogie Preprocessor took 20.52ms. Allocated memory is still 117.4MB. Free memory was 77.5MB in the beginning and 76.3MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 05:47:59,981 INFO L158 Benchmark]: RCFGBuilder took 798.17ms. Allocated memory is still 117.4MB. Free memory was 76.3MB in the beginning and 90.9MB in the end (delta: -14.6MB). Peak memory consumption was 45.7MB. Max. memory is 16.1GB. [2024-11-14 05:47:59,981 INFO L158 Benchmark]: TraceAbstraction took 699158.16ms. Allocated memory was 117.4MB in the beginning and 637.5MB in the end (delta: 520.1MB). Free memory was 90.4MB in the beginning and 496.2MB in the end (delta: -405.9MB). Peak memory consumption was 338.9MB. Max. memory is 16.1GB. [2024-11-14 05:47:59,982 INFO L158 Benchmark]: Witness Printer took 5.76ms. Allocated memory is still 637.5MB. Free memory was 496.2MB in the beginning and 496.2MB in the end (delta: 45.8kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 05:47:59,983 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 117.4MB. Free memory is still 74.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 368.47ms. Allocated memory is still 117.4MB. Free memory was 92.5MB in the beginning and 79.1MB in the end (delta: 13.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.77ms. Allocated memory is still 117.4MB. Free memory was 79.1MB in the beginning and 77.5MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 20.52ms. Allocated memory is still 117.4MB. Free memory was 77.5MB in the beginning and 76.3MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 798.17ms. Allocated memory is still 117.4MB. Free memory was 76.3MB in the beginning and 90.9MB in the end (delta: -14.6MB). Peak memory consumption was 45.7MB. Max. memory is 16.1GB. * TraceAbstraction took 699158.16ms. Allocated memory was 117.4MB in the beginning and 637.5MB in the end (delta: 520.1MB). Free memory was 90.4MB in the beginning and 496.2MB in the end (delta: -405.9MB). Peak memory consumption was 338.9MB. Max. memory is 16.1GB. * Witness Printer took 5.76ms. Allocated memory is still 637.5MB. Free memory was 496.2MB in the beginning and 496.2MB in the end (delta: 45.8kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 17]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 173, overapproximation of bitwiseOr at line 77, overapproximation of bitwiseAnd at line 76. Possible FailurePath: [L221] unsigned int a ; [L222] unsigned int ma = __VERIFIER_nondet_uint(); [L223] signed char ea = __VERIFIER_nondet_char(); [L224] unsigned int b ; [L225] unsigned int mb = __VERIFIER_nondet_uint(); [L226] signed char eb = __VERIFIER_nondet_char(); [L227] unsigned int r_mul ; [L228] unsigned int zero ; [L229] unsigned int one ; [L230] int sb ; [L231] int tmp ; [L232] int tmp___0 ; [L233] int tmp___1 ; [L234] int __retres16 ; VAL [ea=127, eb=-24] [L238] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L29] COND TRUE ! m [L30] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0] [L80] return (__retres4); [L238] RET, EXPR base2flt(0, 0) VAL [ea=127, eb=-24] [L238] zero = base2flt(0, 0) [L239] CALL, EXPR base2flt(1, 0) VAL [\old(e)=0, \old(m)=1] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=1, e=0, m=1] [L29] COND FALSE !(! m) VAL [\old(e)=0, \old(m)=1, e=0, m=1] [L35] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=0, m=1] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=0, m=1] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-1, m=2] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-1, m=2] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-1, m=2] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-2, m=4] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-2, m=4] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-2, m=4] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-3, m=8] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-3, m=8] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-3, m=8] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-4, m=16] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-4, m=16] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-4, m=16] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-5, m=32] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-5, m=32] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-5, m=32] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-6, m=64] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-6, m=64] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-6, m=64] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-7, m=128] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-7, m=128] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-7, m=128] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-8, m=256] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-8, m=256] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-8, m=256] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-9, m=512] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-9, m=512] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-9, m=512] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-10, m=1024] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-10, m=1024] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-10, m=1024] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-11, m=2048] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-11, m=2048] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-11, m=2048] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-12, m=4096] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-12, m=4096] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-12, m=4096] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-13, m=8192] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-13, m=8192] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-13, m=8192] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-14, m=16384] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-14, m=16384] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-14, m=16384] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-15, m=32768] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-15, m=32768] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-15, m=32768] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-16, m=65536] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-16, m=65536] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-16, m=65536] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-17, m=131072] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-17, m=131072] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-17, m=131072] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-18, m=262144] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-18, m=262144] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-18, m=262144] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-19, m=524288] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-19, m=524288] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-19, m=524288] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-20, m=1048576] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-20, m=1048576] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-20, m=1048576] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-21, m=2097152] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-21, m=2097152] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-21, m=2097152] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-22, m=4194304] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-22, m=4194304] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-22, m=4194304] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-23, m=8388608] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-23, m=8388608] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-23, m=8388608] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-24, m=16777216] [L47] COND FALSE !(m < 1U << 24U) VAL [\old(e)=0, \old(m)=1, e=-24, m=16777216] [L76] EXPR m & ~ (1U << 24U) [L76] m = m & ~ (1U << 24U) [L77] EXPR m | ((unsigned int )(e + 128) << 24U) [L77] res = m | ((unsigned int )(e + 128) << 24U) [L78] __retres4 = res VAL [\old(e)=0, \old(m)=1, __retres4=1761607680] [L80] return (__retres4); [L239] RET, EXPR base2flt(1, 0) VAL [ea=127, eb=-24] [L239] one = base2flt(1, 0) [L240] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=127, \old(m)=4311744512] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=127, \old(m)=4311744512, e=127, m=4311744512] [L29] COND FALSE !(! m) VAL [\old(e)=127, \old(m)=4311744512, e=127, m=4311744512] [L35] COND FALSE !(m < 1U << 24U) VAL [\old(e)=127, \old(m)=4311744512, e=127, m=4311744512] [L57] COND TRUE 1 VAL [\old(e)=127, \old(m)=4311744512, e=127, m=4311744512] [L59] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=127, \old(m)=4311744512, e=127, m=4311744512] [L76] EXPR m & ~ (1U << 24U) [L76] m = m & ~ (1U << 24U) [L77] EXPR m | ((unsigned int )(e + 128) << 24U) [L77] res = m | ((unsigned int )(e + 128) << 24U) [L78] __retres4 = res VAL [\old(e)=127, \old(m)=4311744512, __retres4=4294967294] [L80] return (__retres4); [L240] RET, EXPR base2flt(ma, ea) VAL [ea=127, eb=-24, ma=4311744512, one=1761607680] [L240] a = base2flt(ma, ea) [L241] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=-24, \old(m)=4328521727] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=-24, \old(m)=4328521727, e=-24, m=4328521727] [L29] COND FALSE !(! m) VAL [\old(e)=-24, \old(m)=4328521727, e=-24, m=4328521727] [L35] COND FALSE !(m < 1U << 24U) VAL [\old(e)=-24, \old(m)=4328521727, e=-24, m=4328521727] [L57] COND TRUE 1 VAL [\old(e)=-24, \old(m)=4328521727, e=-24, m=4328521727] [L59] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=-24, \old(m)=4328521727, e=-24, m=4328521727] [L76] EXPR m & ~ (1U << 24U) [L76] m = m & ~ (1U << 24U) [L77] EXPR m | ((unsigned int )(e + 128) << 24U) [L77] res = m | ((unsigned int )(e + 128) << 24U) [L78] __retres4 = res VAL [\old(e)=-24, \old(m)=4328521727, __retres4=-2533359616] [L80] return (__retres4); [L241] RET, EXPR base2flt(mb, eb) VAL [a=4294967294, ea=127, eb=-24, ma=4311744512, mb=4328521727, one=1761607680] [L241] b = base2flt(mb, eb) [L242] CALL, EXPR mulflt(a, b) [L148] unsigned int res ; [L149] unsigned int ma ; [L150] unsigned int mb ; [L151] unsigned long long accu ; [L152] int ea ; [L153] int eb ; [L154] unsigned int tmp ; [L155] unsigned int __retres10 ; [L158] COND FALSE !(a < b) VAL [a=4294967294, b=-2533359616] [L165] COND FALSE !(! b) [L171] ma = a & ((1U << 24U) - 1U) [L172] ea = (int )(a >> 24U) - 128 [L173] EXPR ma | (1U << 24U) [L173] ma = ma | (1U << 24U) [L174] mb = b & ((1U << 24U) - 1U) [L175] eb = (int )(b >> 24U) - 128 [L176] EXPR mb | (1U << 24U) [L176] mb = mb | (1U << 24U) [L177] ea = ea + eb [L178] ea = ea + 24 VAL [ea=128, ma=16777216, mb=16777216] [L179] COND TRUE ea > 127 [L180] __retres10 = 4294967295U VAL [__retres10=4294967295, ma=16777216, mb=16777216] [L217] return (__retres10); [L242] RET, EXPR mulflt(a, b) [L242] r_mul = mulflt(a, b) [L244] COND FALSE !(b < one) [L247] COND FALSE !(b > one) [L250] tmp = 0 [L252] sb = tmp VAL [a=4294967294, ea=127, eb=-24, ma=4311744512, mb=4328521727, r_mul=4294967295, sb=0, tmp=4328521729] [L254] COND TRUE sb == 0 [L255] COND FALSE !(r_mul < a) [L258] COND TRUE r_mul > a [L259] tmp___0 = 1 [L263] tmp___1 = tmp___0 VAL [ea=127, eb=-24, ma=4311744512, mb=4328521727, tmp=4328521729, tmp___0=4328521728, tmp___1=1] [L266] CALL __VERIFIER_assert(tmp___1 == 0) VAL [\old(cond)=0] [L16] COND TRUE !(cond) VAL [\old(cond)=0] [L17] reach_error() VAL [\old(cond)=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 699.0s, OverallIterations: 25, TraceHistogramMax: 24, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 420.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 8319 SdHoareTripleChecker+Valid, 112.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8199 mSDsluCounter, 16045 SdHoareTripleChecker+Invalid, 106.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 15125 mSDsCounter, 3372 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 39737 IncrementalHoareTripleChecker+Invalid, 43110 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3372 mSolverCounterUnsat, 920 mSDtfsCounter, 39737 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4571 GetRequests, 2702 SyntacticMatches, 19 SemanticMatches, 1850 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79335 ImplicationChecksByTransitivity, 530.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=198occurred in iteration=23, InterpolantAutomatonStates: 1059, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.1s AutomataMinimizationTime, 24 MinimizatonAttempts, 2317 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 4.5s SatisfiabilityAnalysisTime, 92.0s InterpolantComputationTime, 2886 NumberOfCodeBlocks, 2814 NumberOfCodeBlocksAsserted, 118 NumberOfCheckSat, 3773 ConstructedInterpolants, 10 QuantifiedInterpolants, 23258 SizeOfPredicates, 47 NumberOfNonLiveVariables, 3786 ConjunctsInSsa, 654 ConjunctsInUnsatCore, 62 InterpolantComputations, 8 PerfectInterpolantSequences, 1839/10258 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 0.8s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 16, DAG_INTERPRETER_EARLY_EXITS: 3, TOOLS_POST_APPLICATIONS: 19, TOOLS_POST_TIME: 0.5s, TOOLS_POST_CALL_APPLICATIONS: 6, TOOLS_POST_CALL_TIME: 0.1s, TOOLS_POST_RETURN_APPLICATIONS: 4, TOOLS_POST_RETURN_TIME: 0.1s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 29, TOOLS_QUANTIFIERELIM_TIME: 0.7s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 41, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 4, DOMAIN_JOIN_TIME: 0.1s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 16, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 4, CALL_SUMMARIZER_CACHE_MISSES: 1, CALL_SUMMARIZER_OVERALL_TIME: 0.2s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.2s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 282, DAG_COMPRESSION_RETAINED_NODES: 61, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2024-11-14 05:48:00,197 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2024-11-14 05:48:00,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/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_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/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 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 05:48:02,658 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 05:48:02,768 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2024-11-14 05:48:02,779 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 05:48:02,780 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 05:48:02,810 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 05:48:02,811 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 05:48:02,812 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 05:48:02,812 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 05:48:02,813 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 05:48:02,813 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 05:48:02,813 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 05:48:02,813 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 05:48:02,813 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 05:48:02,814 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 05:48:02,815 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 05:48:02,815 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 05:48:02,815 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 05:48:02,815 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 05:48:02,816 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 05:48:02,816 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 05:48:02,816 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 05:48:02,816 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 05:48:02,816 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 05:48:02,816 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-14 05:48:02,816 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-14 05:48:02,817 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 05:48:02,817 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-14 05:48:02,817 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 05:48:02,817 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 05:48:02,818 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 05:48:02,818 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 05:48:02,818 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-14 05:48:02,818 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 05:48:02,819 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 05:48:02,819 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 05:48:02,819 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 05:48:02,819 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 05:48:02,819 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 05:48:02,819 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2024-11-14 05:48:02,819 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-14 05:48:02,819 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 05:48:02,820 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 05:48:02,820 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_90c491da-b510-467b-babb-1c1df7904e90/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 -> 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 [2024-11-14 05:48:03,135 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 05:48:03,144 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 05:48:03,149 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 05:48:03,150 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 05:48:03,150 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 05:48:03,153 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c Unable to find full path for "g++" [2024-11-14 05:48:05,172 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 05:48:05,480 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 05:48:05,482 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2024-11-14 05:48:05,499 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/data/95bd56bc1/da188348af06484b8b7a81d828e49b13/FLAG99856e1f9 [2024-11-14 05:48:05,548 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/data/95bd56bc1/da188348af06484b8b7a81d828e49b13 [2024-11-14 05:48:05,556 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 05:48:05,560 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 05:48:05,562 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 05:48:05,563 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 05:48:05,570 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 05:48:05,571 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 05:48:05" (1/1) ... [2024-11-14 05:48:05,574 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@357c83f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:48:05, skipping insertion in model container [2024-11-14 05:48:05,574 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 05:48:05" (1/1) ... [2024-11-14 05:48:05,598 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 05:48:05,765 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_90c491da-b510-467b-babb-1c1df7904e90/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c[728,741] [2024-11-14 05:48:05,842 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 05:48:05,858 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 05:48:05,871 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_90c491da-b510-467b-babb-1c1df7904e90/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c[728,741] [2024-11-14 05:48:05,921 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 05:48:05,940 INFO L204 MainTranslator]: Completed translation [2024-11-14 05:48:05,942 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:48:05 WrapperNode [2024-11-14 05:48:05,942 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 05:48:05,943 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 05:48:05,944 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 05:48:05,944 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 05:48:05,950 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:48:05" (1/1) ... [2024-11-14 05:48:05,962 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:48:05" (1/1) ... [2024-11-14 05:48:05,987 INFO L138 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 113 [2024-11-14 05:48:05,988 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 05:48:05,989 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 05:48:05,989 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 05:48:05,989 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 05:48:05,995 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:48:05" (1/1) ... [2024-11-14 05:48:05,995 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:48:05" (1/1) ... [2024-11-14 05:48:06,004 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:48:05" (1/1) ... [2024-11-14 05:48:06,004 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:48:05" (1/1) ... [2024-11-14 05:48:06,015 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:48:05" (1/1) ... [2024-11-14 05:48:06,026 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:48:05" (1/1) ... [2024-11-14 05:48:06,031 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:48:05" (1/1) ... [2024-11-14 05:48:06,032 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:48:05" (1/1) ... [2024-11-14 05:48:06,034 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 05:48:06,035 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 05:48:06,039 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 05:48:06,039 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 05:48:06,040 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:48:05" (1/1) ... [2024-11-14 05:48:06,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 05:48:06,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:48:06,074 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 05:48:06,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 05:48:06,112 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 05:48:06,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2024-11-14 05:48:06,112 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-11-14 05:48:06,112 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-11-14 05:48:06,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 05:48:06,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 05:48:06,112 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-14 05:48:06,113 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-14 05:48:06,206 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 05:48:06,208 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 05:48:06,612 INFO L? ?]: Removed 48 outVars from TransFormulas that were not future-live. [2024-11-14 05:48:06,616 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 05:48:06,629 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 05:48:06,630 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-14 05:48:06,630 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 05:48:06 BoogieIcfgContainer [2024-11-14 05:48:06,630 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 05:48:06,633 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 05:48:06,633 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 05:48:06,639 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 05:48:06,639 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 05:48:05" (1/3) ... [2024-11-14 05:48:06,640 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bad0ad9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 05:48:06, skipping insertion in model container [2024-11-14 05:48:06,641 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:48:05" (2/3) ... [2024-11-14 05:48:06,641 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bad0ad9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 05:48:06, skipping insertion in model container [2024-11-14 05:48:06,642 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 05:48:06" (3/3) ... [2024-11-14 05:48:06,643 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_3a.c.cil.c [2024-11-14 05:48:06,660 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 05:48:06,662 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG soft_float_3a.c.cil.c that has 3 procedures, 51 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-14 05:48:06,723 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 05:48:06,741 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;@560b28cc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 05:48:06,741 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 05:48:06,746 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 42 states have (on average 1.5714285714285714) internal successors, (66), 44 states have internal predecessors, (66), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-14 05:48:06,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-14 05:48:06,757 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:48:06,758 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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 05:48:06,758 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:48:06,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:48:06,765 INFO L85 PathProgramCache]: Analyzing trace with hash 643046103, now seen corresponding path program 1 times [2024-11-14 05:48:06,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:48:06,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1834378884] [2024-11-14 05:48:06,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:48:06,775 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 05:48:06,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:48:06,777 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 05:48:06,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-11-14 05:48:06,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:48:06,888 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:48:06,894 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:48:06,995 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 05:48:06,996 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:48:06,996 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:48:06,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1834378884] [2024-11-14 05:48:06,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1834378884] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:48:06,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:48:06,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 05:48:06,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206965549] [2024-11-14 05:48:07,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:48:07,004 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 05:48:07,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:48:07,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 05:48:07,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 05:48:07,029 INFO L87 Difference]: Start difference. First operand has 51 states, 42 states have (on average 1.5714285714285714) internal successors, (66), 44 states have internal predecessors, (66), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 05:48:07,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:48:07,221 INFO L93 Difference]: Finished difference Result 113 states and 179 transitions. [2024-11-14 05:48:07,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 05:48:07,224 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2024-11-14 05:48:07,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:48:07,232 INFO L225 Difference]: With dead ends: 113 [2024-11-14 05:48:07,232 INFO L226 Difference]: Without dead ends: 59 [2024-11-14 05:48:07,237 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:48:07,243 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 12 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:48:07,244 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 163 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:48:07,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-14 05:48:07,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 50. [2024-11-14 05:48:07,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 42 states have internal predecessors, (59), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-14 05:48:07,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 70 transitions. [2024-11-14 05:48:07,291 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 70 transitions. Word has length 41 [2024-11-14 05:48:07,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:48:07,292 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 70 transitions. [2024-11-14 05:48:07,293 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 05:48:07,293 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 70 transitions. [2024-11-14 05:48:07,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-14 05:48:07,296 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:48:07,297 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 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 05:48:07,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2024-11-14 05:48:07,500 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 05:48:07,500 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:48:07,501 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:48:07,501 INFO L85 PathProgramCache]: Analyzing trace with hash 85303449, now seen corresponding path program 1 times [2024-11-14 05:48:07,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:48:07,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [100409622] [2024-11-14 05:48:07,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:48:07,502 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 05:48:07,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:48:07,504 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 05:48:07,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-11-14 05:48:07,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:48:07,595 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:48:07,597 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:48:07,655 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 05:48:07,656 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:48:07,656 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:48:07,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [100409622] [2024-11-14 05:48:07,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [100409622] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:48:07,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:48:07,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 05:48:07,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585434991] [2024-11-14 05:48:07,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:48:07,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 05:48:07,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:48:07,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 05:48:07,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 05:48:07,659 INFO L87 Difference]: Start difference. First operand 50 states and 70 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 05:48:07,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:48:07,760 INFO L93 Difference]: Finished difference Result 102 states and 145 transitions. [2024-11-14 05:48:07,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 05:48:07,761 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 44 [2024-11-14 05:48:07,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:48:07,762 INFO L225 Difference]: With dead ends: 102 [2024-11-14 05:48:07,762 INFO L226 Difference]: Without dead ends: 59 [2024-11-14 05:48:07,762 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 05:48:07,763 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 7 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:48:07,765 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 157 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:48:07,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-14 05:48:07,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2024-11-14 05:48:07,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 46 states have (on average 1.391304347826087) internal successors, (64), 47 states have internal predecessors, (64), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-14 05:48:07,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 77 transitions. [2024-11-14 05:48:07,783 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 77 transitions. Word has length 44 [2024-11-14 05:48:07,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:48:07,783 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 77 transitions. [2024-11-14 05:48:07,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 05:48:07,784 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 77 transitions. [2024-11-14 05:48:07,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-14 05:48:07,785 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:48:07,785 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 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 05:48:07,789 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2024-11-14 05:48:07,985 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 05:48:07,986 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:48:07,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:48:07,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1542385401, now seen corresponding path program 1 times [2024-11-14 05:48:07,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:48:07,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1345889900] [2024-11-14 05:48:07,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:48:07,987 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 05:48:07,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:48:07,989 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 05:48:07,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2024-11-14 05:48:08,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:48:08,077 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:48:08,081 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:48:08,145 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 05:48:08,148 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:48:08,148 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:48:08,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1345889900] [2024-11-14 05:48:08,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1345889900] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:48:08,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:48:08,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 05:48:08,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063951707] [2024-11-14 05:48:08,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:48:08,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 05:48:08,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:48:08,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 05:48:08,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 05:48:08,150 INFO L87 Difference]: Start difference. First operand 55 states and 77 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 05:48:08,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:48:08,280 INFO L93 Difference]: Finished difference Result 114 states and 162 transitions. [2024-11-14 05:48:08,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 05:48:08,281 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2024-11-14 05:48:08,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:48:08,282 INFO L225 Difference]: With dead ends: 114 [2024-11-14 05:48:08,282 INFO L226 Difference]: Without dead ends: 66 [2024-11-14 05:48:08,282 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:48:08,283 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 16 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:48:08,286 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 160 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:48:08,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-14 05:48:08,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 56. [2024-11-14 05:48:08,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 48 states have internal predecessors, (65), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-14 05:48:08,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 78 transitions. [2024-11-14 05:48:08,298 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 78 transitions. Word has length 45 [2024-11-14 05:48:08,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:48:08,298 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 78 transitions. [2024-11-14 05:48:08,298 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 05:48:08,298 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 78 transitions. [2024-11-14 05:48:08,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-14 05:48:08,300 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:48:08,300 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 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 05:48:08,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2024-11-14 05:48:08,500 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 05:48:08,500 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:48:08,501 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:48:08,501 INFO L85 PathProgramCache]: Analyzing trace with hash -759658855, now seen corresponding path program 1 times [2024-11-14 05:48:08,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:48:08,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1806619135] [2024-11-14 05:48:08,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:48:08,502 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 05:48:08,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:48:08,504 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 05:48:08,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2024-11-14 05:48:08,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:48:08,575 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 05:48:08,577 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:48:08,641 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 05:48:08,641 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:48:08,642 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:48:08,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1806619135] [2024-11-14 05:48:08,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1806619135] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:48:08,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:48:08,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 05:48:08,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102990823] [2024-11-14 05:48:08,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:48:08,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 05:48:08,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:48:08,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 05:48:08,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:48:08,643 INFO L87 Difference]: Start difference. First operand 56 states and 78 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 05:48:08,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:48:08,868 INFO L93 Difference]: Finished difference Result 122 states and 173 transitions. [2024-11-14 05:48:08,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 05:48:08,869 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2024-11-14 05:48:08,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:48:08,870 INFO L225 Difference]: With dead ends: 122 [2024-11-14 05:48:08,873 INFO L226 Difference]: Without dead ends: 73 [2024-11-14 05:48:08,874 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:48:08,874 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 14 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:48:08,875 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 216 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:48:08,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-14 05:48:08,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 57. [2024-11-14 05:48:08,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 49 states have internal predecessors, (67), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-14 05:48:08,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 80 transitions. [2024-11-14 05:48:08,894 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 80 transitions. Word has length 46 [2024-11-14 05:48:08,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:48:08,898 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 80 transitions. [2024-11-14 05:48:08,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 05:48:08,898 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 80 transitions. [2024-11-14 05:48:08,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-14 05:48:08,899 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:48:08,899 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 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 05:48:08,904 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2024-11-14 05:48:09,102 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 05:48:09,102 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:48:09,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:48:09,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1790339430, now seen corresponding path program 1 times [2024-11-14 05:48:09,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:48:09,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1268268104] [2024-11-14 05:48:09,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:48:09,103 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 05:48:09,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:48:09,105 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 05:48:09,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2024-11-14 05:48:09,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:48:09,202 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 05:48:09,204 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:48:09,274 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 05:48:09,275 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:48:09,453 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 05:48:09,453 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:48:09,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1268268104] [2024-11-14 05:48:09,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1268268104] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:48:09,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [94259279] [2024-11-14 05:48:09,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:48:09,455 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:48:09,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:48:09,464 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:48:09,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2024-11-14 05:48:09,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:48:09,565 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 05:48:09,567 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:48:09,592 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-14 05:48:09,592 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:48:09,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [94259279] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:48:09,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 05:48:09,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 9 [2024-11-14 05:48:09,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114859515] [2024-11-14 05:48:09,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:48:09,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:48:09,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:48:09,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:48:09,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-14 05:48:09,594 INFO L87 Difference]: Start difference. First operand 57 states and 80 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-14 05:48:09,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:48:09,610 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2024-11-14 05:48:09,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:48:09,611 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 47 [2024-11-14 05:48:09,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:48:09,612 INFO L225 Difference]: With dead ends: 66 [2024-11-14 05:48:09,613 INFO L226 Difference]: Without dead ends: 57 [2024-11-14 05:48:09,613 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-14 05:48:09,614 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:48:09,614 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 124 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:48:09,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-14 05:48:09,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-11-14 05:48:09,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.375) internal successors, (66), 49 states have internal predecessors, (66), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-14 05:48:09,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2024-11-14 05:48:09,622 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 47 [2024-11-14 05:48:09,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:48:09,623 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2024-11-14 05:48:09,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-14 05:48:09,623 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2024-11-14 05:48:09,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-14 05:48:09,626 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:48:09,626 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 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 05:48:09,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2024-11-14 05:48:09,828 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2024-11-14 05:48:10,026 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt [2024-11-14 05:48:10,027 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:48:10,027 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:48:10,027 INFO L85 PathProgramCache]: Analyzing trace with hash -956672372, now seen corresponding path program 1 times [2024-11-14 05:48:10,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:48:10,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1962780089] [2024-11-14 05:48:10,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:48:10,028 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 05:48:10,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:48:10,030 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 05:48:10,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2024-11-14 05:48:10,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:48:10,095 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 05:48:10,096 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:48:10,161 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 05:48:10,161 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:48:10,342 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 05:48:10,343 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:48:10,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1962780089] [2024-11-14 05:48:10,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1962780089] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:48:10,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1795080461] [2024-11-14 05:48:10,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:48:10,343 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:48:10,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:48:10,347 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:48:10,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2024-11-14 05:48:10,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:48:10,440 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 05:48:10,441 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:48:10,511 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-14 05:48:10,513 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:48:10,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1795080461] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:48:10,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 05:48:10,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 10 [2024-11-14 05:48:10,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663163937] [2024-11-14 05:48:10,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:48:10,514 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 05:48:10,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:48:10,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 05:48:10,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-14 05:48:10,515 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-14 05:48:10,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:48:10,537 INFO L93 Difference]: Finished difference Result 67 states and 90 transitions. [2024-11-14 05:48:10,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 05:48:10,537 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2024-11-14 05:48:10,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:48:10,539 INFO L225 Difference]: With dead ends: 67 [2024-11-14 05:48:10,541 INFO L226 Difference]: Without dead ends: 57 [2024-11-14 05:48:10,545 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-14 05:48:10,546 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 0 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:48:10,546 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 181 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:48:10,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-14 05:48:10,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-11-14 05:48:10,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 49 states have internal predecessors, (65), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-14 05:48:10,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 78 transitions. [2024-11-14 05:48:10,554 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 78 transitions. Word has length 49 [2024-11-14 05:48:10,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:48:10,554 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 78 transitions. [2024-11-14 05:48:10,554 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-14 05:48:10,554 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 78 transitions. [2024-11-14 05:48:10,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-14 05:48:10,556 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:48:10,556 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 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 05:48:10,558 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2024-11-14 05:48:10,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2024-11-14 05:48:10,959 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 05:48:10,959 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:48:10,959 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:48:10,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1766018998, now seen corresponding path program 1 times [2024-11-14 05:48:10,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:48:10,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1032535146] [2024-11-14 05:48:10,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:48:10,960 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 05:48:10,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:48:10,962 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 05:48:10,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2024-11-14 05:48:11,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:48:11,021 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 05:48:11,023 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:48:11,100 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 05:48:11,100 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:48:11,288 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 05:48:11,289 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:48:11,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1032535146] [2024-11-14 05:48:11,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1032535146] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:48:11,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [978950948] [2024-11-14 05:48:11,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:48:11,289 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:48:11,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:48:11,291 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:48:11,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2024-11-14 05:48:11,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:48:11,394 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 05:48:11,398 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:48:11,505 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-14 05:48:11,505 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:48:11,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [978950948] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:48:11,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 05:48:11,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 5] total 12 [2024-11-14 05:48:11,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048608794] [2024-11-14 05:48:11,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:48:11,506 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 05:48:11,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:48:11,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 05:48:11,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-14 05:48:11,507 INFO L87 Difference]: Start difference. First operand 57 states and 78 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-14 05:48:11,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:48:11,567 INFO L93 Difference]: Finished difference Result 87 states and 120 transitions. [2024-11-14 05:48:11,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 05:48:11,568 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2024-11-14 05:48:11,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:48:11,570 INFO L225 Difference]: With dead ends: 87 [2024-11-14 05:48:11,570 INFO L226 Difference]: Without dead ends: 66 [2024-11-14 05:48:11,571 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-14 05:48:11,571 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 1 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:48:11,572 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 281 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:48:11,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-14 05:48:11,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-11-14 05:48:11,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 55 states have (on average 1.309090909090909) internal successors, (72), 57 states have internal predecessors, (72), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2024-11-14 05:48:11,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 90 transitions. [2024-11-14 05:48:11,582 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 90 transitions. Word has length 49 [2024-11-14 05:48:11,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:48:11,582 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 90 transitions. [2024-11-14 05:48:11,582 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-14 05:48:11,583 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 90 transitions. [2024-11-14 05:48:11,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-14 05:48:11,583 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:48:11,584 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 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 05:48:11,586 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (11)] Ended with exit code 0 [2024-11-14 05:48:11,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2024-11-14 05:48:11,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 05:48:11,984 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:48:11,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:48:11,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1942142284, now seen corresponding path program 1 times [2024-11-14 05:48:11,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:48:11,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [557879830] [2024-11-14 05:48:11,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:48:11,985 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 05:48:11,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:48:11,987 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 05:48:11,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2024-11-14 05:48:12,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:48:12,052 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 05:48:12,054 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:48:12,125 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 05:48:12,126 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:48:12,290 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 05:48:12,291 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:48:12,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [557879830] [2024-11-14 05:48:12,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [557879830] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:48:12,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1466003502] [2024-11-14 05:48:12,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:48:12,291 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:48:12,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:48:12,293 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:48:12,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2024-11-14 05:48:12,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:48:12,389 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 05:48:12,391 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:48:12,504 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-14 05:48:12,505 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:48:12,584 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-14 05:48:12,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1466003502] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:48:12,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377136578] [2024-11-14 05:48:12,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:48:12,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:48:12,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:48:12,587 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:48:12,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 05:48:12,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:48:12,657 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 05:48:12,659 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:48:12,703 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 05:48:12,703 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:48:12,820 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 05:48:12,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377136578] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:48:12,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 05:48:12,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 6, 5, 5] total 12 [2024-11-14 05:48:12,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57339995] [2024-11-14 05:48:12,823 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 05:48:12,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-14 05:48:12,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:48:12,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-14 05:48:12,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-14 05:48:12,825 INFO L87 Difference]: Start difference. First operand 66 states and 90 transitions. Second operand has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 11 states have internal predecessors, (67), 3 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-14 05:48:13,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:48:13,353 INFO L93 Difference]: Finished difference Result 171 states and 245 transitions. [2024-11-14 05:48:13,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-14 05:48:13,354 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 11 states have internal predecessors, (67), 3 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 49 [2024-11-14 05:48:13,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:48:13,356 INFO L225 Difference]: With dead ends: 171 [2024-11-14 05:48:13,356 INFO L226 Difference]: Without dead ends: 112 [2024-11-14 05:48:13,358 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2024-11-14 05:48:13,359 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 32 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:48:13,359 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 465 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 05:48:13,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-11-14 05:48:13,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 95. [2024-11-14 05:48:13,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 83 states have (on average 1.3493975903614457) internal successors, (112), 83 states have internal predecessors, (112), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) [2024-11-14 05:48:13,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 136 transitions. [2024-11-14 05:48:13,386 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 136 transitions. Word has length 49 [2024-11-14 05:48:13,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:48:13,387 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 136 transitions. [2024-11-14 05:48:13,387 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 11 states have internal predecessors, (67), 3 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-14 05:48:13,387 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 136 transitions. [2024-11-14 05:48:13,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-14 05:48:13,391 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:48:13,391 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 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, 1, 1] [2024-11-14 05:48:13,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2024-11-14 05:48:13,595 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2024-11-14 05:48:13,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-14 05:48:13,994 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:48:13,994 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:48:13,995 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:48:13,995 INFO L85 PathProgramCache]: Analyzing trace with hash -641595790, now seen corresponding path program 1 times [2024-11-14 05:48:13,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:48:13,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [173458507] [2024-11-14 05:48:13,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:48:13,995 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 05:48:13,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:48:13,998 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 05:48:13,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2024-11-14 05:48:14,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:48:14,063 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 05:48:14,065 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:48:14,138 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 05:48:14,138 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:48:14,335 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 05:48:14,335 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:48:14,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [173458507] [2024-11-14 05:48:14,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [173458507] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:48:14,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [881915279] [2024-11-14 05:48:14,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:48:14,336 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:48:14,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:48:14,338 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:48:14,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2024-11-14 05:48:14,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:48:14,431 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 05:48:14,432 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:48:14,509 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-14 05:48:14,509 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:48:14,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [881915279] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:48:14,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 05:48:14,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2024-11-14 05:48:14,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955125209] [2024-11-14 05:48:14,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:48:14,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 05:48:14,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:48:14,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 05:48:14,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-14 05:48:14,512 INFO L87 Difference]: Start difference. First operand 95 states and 136 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-14 05:48:14,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:48:14,565 INFO L93 Difference]: Finished difference Result 116 states and 158 transitions. [2024-11-14 05:48:14,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 05:48:14,566 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 53 [2024-11-14 05:48:14,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:48:14,567 INFO L225 Difference]: With dead ends: 116 [2024-11-14 05:48:14,569 INFO L226 Difference]: Without dead ends: 110 [2024-11-14 05:48:14,570 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-14 05:48:14,570 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 0 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:48:14,570 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 218 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:48:14,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-11-14 05:48:14,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2024-11-14 05:48:14,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 98 states have (on average 1.3061224489795917) internal successors, (128), 98 states have internal predecessors, (128), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) [2024-11-14 05:48:14,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 152 transitions. [2024-11-14 05:48:14,592 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 152 transitions. Word has length 53 [2024-11-14 05:48:14,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:48:14,593 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 152 transitions. [2024-11-14 05:48:14,593 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-14 05:48:14,593 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 152 transitions. [2024-11-14 05:48:14,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-14 05:48:14,596 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:48:14,596 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 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, 1, 1] [2024-11-14 05:48:14,600 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2024-11-14 05:48:14,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2024-11-14 05:48:14,996 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt [2024-11-14 05:48:14,997 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:48:14,997 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:48:14,997 INFO L85 PathProgramCache]: Analyzing trace with hash -584337488, now seen corresponding path program 1 times [2024-11-14 05:48:14,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:48:14,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1704909097] [2024-11-14 05:48:14,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:48:14,998 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 05:48:14,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:48:14,999 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 05:48:15,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2024-11-14 05:48:15,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:48:15,061 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 05:48:15,062 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:48:15,135 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 05:48:15,136 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:48:15,321 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 05:48:15,322 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:48:15,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1704909097] [2024-11-14 05:48:15,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1704909097] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:48:15,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [440884081] [2024-11-14 05:48:15,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:48:15,322 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:48:15,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:48:15,324 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:48:15,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2024-11-14 05:48:15,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:48:15,455 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 05:48:15,457 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:48:15,495 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 05:48:15,495 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:48:15,595 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 05:48:15,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [440884081] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:48:15,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684549235] [2024-11-14 05:48:15,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:48:15,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:48:15,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:48:15,598 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:48:15,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-14 05:48:15,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:48:15,670 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 05:48:15,671 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:48:15,798 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 05:48:15,798 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:48:15,880 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-14 05:48:15,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684549235] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-14 05:48:15,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2024-11-14 05:48:15,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6, 6, 6, 8] total 17 [2024-11-14 05:48:15,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515973613] [2024-11-14 05:48:15,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:48:15,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 05:48:15,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:48:15,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 05:48:15,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-11-14 05:48:15,883 INFO L87 Difference]: Start difference. First operand 110 states and 152 transitions. Second operand has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-14 05:48:15,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:48:15,935 INFO L93 Difference]: Finished difference Result 116 states and 157 transitions. [2024-11-14 05:48:15,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 05:48:15,935 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 53 [2024-11-14 05:48:15,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:48:15,936 INFO L225 Difference]: With dead ends: 116 [2024-11-14 05:48:15,938 INFO L226 Difference]: Without dead ends: 99 [2024-11-14 05:48:15,939 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-11-14 05:48:15,939 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 1 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:48:15,939 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 293 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:48:15,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-14 05:48:15,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2024-11-14 05:48:15,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 87 states have (on average 1.2988505747126438) internal successors, (113), 88 states have internal predecessors, (113), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2024-11-14 05:48:15,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 134 transitions. [2024-11-14 05:48:15,956 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 134 transitions. Word has length 53 [2024-11-14 05:48:15,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:48:15,957 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 134 transitions. [2024-11-14 05:48:15,957 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-14 05:48:15,957 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 134 transitions. [2024-11-14 05:48:15,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-14 05:48:15,958 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:48:15,958 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1] [2024-11-14 05:48:15,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-14 05:48:16,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2024-11-14 05:48:16,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2024-11-14 05:48:16,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt [2024-11-14 05:48:16,559 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:48:16,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:48:16,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1420558684, now seen corresponding path program 1 times [2024-11-14 05:48:16,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:48:16,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1223620100] [2024-11-14 05:48:16,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:48:16,560 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 05:48:16,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:48:16,564 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 05:48:16,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2024-11-14 05:48:16,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:48:16,625 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 05:48:16,626 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:48:16,691 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 05:48:16,692 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:48:16,878 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 05:48:16,878 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:48:16,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1223620100] [2024-11-14 05:48:16,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1223620100] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:48:16,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1711612200] [2024-11-14 05:48:16,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:48:16,879 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:48:16,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:48:16,881 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:48:16,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2024-11-14 05:48:17,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:48:17,008 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 05:48:17,010 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:48:17,045 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 05:48:17,046 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:48:17,151 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 05:48:17,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1711612200] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:48:17,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769050562] [2024-11-14 05:48:17,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:48:17,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:48:17,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:48:17,154 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:48:17,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-14 05:48:17,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:48:17,223 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 05:48:17,224 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:48:17,336 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 05:48:17,336 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:48:17,519 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 05:48:17,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769050562] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:48:17,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 05:48:17,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 7, 7] total 15 [2024-11-14 05:48:17,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51237157] [2024-11-14 05:48:17,520 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 05:48:17,521 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-14 05:48:17,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:48:17,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-14 05:48:17,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2024-11-14 05:48:17,522 INFO L87 Difference]: Start difference. First operand 99 states and 134 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-14 05:48:17,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:48:17,963 INFO L93 Difference]: Finished difference Result 223 states and 308 transitions. [2024-11-14 05:48:17,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-14 05:48:17,964 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 55 [2024-11-14 05:48:17,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:48:17,965 INFO L225 Difference]: With dead ends: 223 [2024-11-14 05:48:17,965 INFO L226 Difference]: Without dead ends: 131 [2024-11-14 05:48:17,966 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2024-11-14 05:48:17,967 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 121 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:48:17,967 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 291 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 05:48:17,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-11-14 05:48:17,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 103. [2024-11-14 05:48:17,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 91 states have (on average 1.3186813186813187) internal successors, (120), 92 states have internal predecessors, (120), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2024-11-14 05:48:17,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 141 transitions. [2024-11-14 05:48:17,987 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 141 transitions. Word has length 55 [2024-11-14 05:48:17,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:48:17,988 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 141 transitions. [2024-11-14 05:48:17,988 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-14 05:48:17,988 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 141 transitions. [2024-11-14 05:48:17,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-14 05:48:17,991 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:48:17,991 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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, 1] [2024-11-14 05:48:17,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2024-11-14 05:48:18,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2024-11-14 05:48:18,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-14 05:48:18,592 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:48:18,592 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:48:18,592 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:48:18,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1562761551, now seen corresponding path program 1 times [2024-11-14 05:48:18,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:48:18,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1377804555] [2024-11-14 05:48:18,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:48:18,593 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 05:48:18,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:48:18,595 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 05:48:18,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2024-11-14 05:48:18,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:48:18,656 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 05:48:18,658 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:48:18,795 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 05:48:18,795 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:48:19,146 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 05:48:19,146 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:48:19,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1377804555] [2024-11-14 05:48:19,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1377804555] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:48:19,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [740626689] [2024-11-14 05:48:19,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:48:19,146 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:48:19,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:48:19,148 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:48:19,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2024-11-14 05:48:19,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:48:19,279 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 05:48:19,281 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:48:19,343 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 05:48:19,343 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:48:19,533 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 05:48:19,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [740626689] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:48:19,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213946844] [2024-11-14 05:48:19,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:48:19,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:48:19,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:48:19,535 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:48:19,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-14 05:48:19,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:48:19,613 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 05:48:19,614 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:48:19,805 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 05:48:19,806 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:48:20,280 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 05:48:20,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213946844] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:48:20,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 05:48:20,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 20 [2024-11-14 05:48:20,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773258511] [2024-11-14 05:48:20,281 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 05:48:20,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-14 05:48:20,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:48:20,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-14 05:48:20,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2024-11-14 05:48:20,283 INFO L87 Difference]: Start difference. First operand 103 states and 141 transitions. Second operand has 20 states, 20 states have (on average 4.7) internal successors, (94), 20 states have internal predecessors, (94), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-14 05:48:21,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:48:21,104 INFO L93 Difference]: Finished difference Result 234 states and 324 transitions. [2024-11-14 05:48:21,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 05:48:21,105 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.7) internal successors, (94), 20 states have internal predecessors, (94), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 62 [2024-11-14 05:48:21,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:48:21,107 INFO L225 Difference]: With dead ends: 234 [2024-11-14 05:48:21,107 INFO L226 Difference]: Without dead ends: 138 [2024-11-14 05:48:21,109 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=206, Invalid=346, Unknown=0, NotChecked=0, Total=552 [2024-11-14 05:48:21,109 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 93 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:48:21,112 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 594 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 05:48:21,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-11-14 05:48:21,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 117. [2024-11-14 05:48:21,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 105 states have (on average 1.361904761904762) internal successors, (143), 106 states have internal predecessors, (143), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2024-11-14 05:48:21,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 164 transitions. [2024-11-14 05:48:21,125 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 164 transitions. Word has length 62 [2024-11-14 05:48:21,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:48:21,125 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 164 transitions. [2024-11-14 05:48:21,125 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.7) internal successors, (94), 20 states have internal predecessors, (94), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-14 05:48:21,125 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 164 transitions. [2024-11-14 05:48:21,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-14 05:48:21,127 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:48:21,127 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 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, 1, 1] [2024-11-14 05:48:21,148 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-14 05:48:21,329 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2024-11-14 05:48:21,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2024-11-14 05:48:21,728 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt [2024-11-14 05:48:21,728 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:48:21,729 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:48:21,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1721380764, now seen corresponding path program 2 times [2024-11-14 05:48:21,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:48:21,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [210080356] [2024-11-14 05:48:21,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 05:48:21,729 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 05:48:21,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:48:21,731 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 05:48:21,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2024-11-14 05:48:21,794 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 05:48:21,794 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:48:21,797 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 05:48:21,798 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:48:21,947 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 05:48:21,948 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:48:22,352 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 4 proven. 54 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 05:48:22,352 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:48:22,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [210080356] [2024-11-14 05:48:22,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [210080356] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:48:22,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [69407362] [2024-11-14 05:48:22,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 05:48:22,353 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:48:22,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:48:22,355 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:48:22,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2024-11-14 05:48:22,514 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 05:48:22,514 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:48:22,516 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 05:48:22,518 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:48:22,583 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 05:48:22,583 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:48:22,769 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 4 proven. 54 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 05:48:22,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [69407362] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:48:22,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181654946] [2024-11-14 05:48:22,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 05:48:22,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:48:22,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:48:22,771 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:48:22,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-14 05:48:22,843 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 05:48:22,843 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:48:22,845 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-14 05:48:22,847 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:48:23,001 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 05:48:23,002 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:48:23,465 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 4 proven. 54 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 05:48:23,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181654946] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:48:23,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 05:48:23,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 27 [2024-11-14 05:48:23,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205871167] [2024-11-14 05:48:23,466 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 05:48:23,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-14 05:48:23,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:48:23,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-14 05:48:23,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=469, Unknown=0, NotChecked=0, Total=702 [2024-11-14 05:48:23,469 INFO L87 Difference]: Start difference. First operand 117 states and 164 transitions. Second operand has 27 states, 27 states have (on average 4.037037037037037) internal successors, (109), 27 states have internal predecessors, (109), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-14 05:48:24,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:48:24,720 INFO L93 Difference]: Finished difference Result 293 states and 416 transitions. [2024-11-14 05:48:24,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-14 05:48:24,721 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.037037037037037) internal successors, (109), 27 states have internal predecessors, (109), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 67 [2024-11-14 05:48:24,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:48:24,723 INFO L225 Difference]: With dead ends: 293 [2024-11-14 05:48:24,723 INFO L226 Difference]: Without dead ends: 183 [2024-11-14 05:48:24,724 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=544, Invalid=1016, Unknown=0, NotChecked=0, Total=1560 [2024-11-14 05:48:24,725 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 258 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 05:48:24,725 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 816 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 05:48:24,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2024-11-14 05:48:24,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 127. [2024-11-14 05:48:24,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 115 states have (on average 1.391304347826087) internal successors, (160), 116 states have internal predecessors, (160), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2024-11-14 05:48:24,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 181 transitions. [2024-11-14 05:48:24,740 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 181 transitions. Word has length 67 [2024-11-14 05:48:24,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:48:24,740 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 181 transitions. [2024-11-14 05:48:24,740 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.037037037037037) internal successors, (109), 27 states have internal predecessors, (109), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-14 05:48:24,741 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 181 transitions. [2024-11-14 05:48:24,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-14 05:48:24,742 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:48:24,742 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 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, 1] [2024-11-14 05:48:24,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2024-11-14 05:48:24,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-11-14 05:48:25,145 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2024-11-14 05:48:25,343 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 05:48:25,343 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:48:25,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:48:25,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1280740335, now seen corresponding path program 2 times [2024-11-14 05:48:25,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:48:25,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [555154315] [2024-11-14 05:48:25,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 05:48:25,344 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 05:48:25,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:48:25,346 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 05:48:25,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2024-11-14 05:48:25,418 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 05:48:25,419 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:48:25,425 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-14 05:48:25,426 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:48:25,734 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 05:48:25,735 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:48:26,744 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 05:48:26,744 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:48:26,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [555154315] [2024-11-14 05:48:26,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [555154315] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:48:26,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1931492845] [2024-11-14 05:48:26,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 05:48:26,744 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:48:26,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:48:26,748 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:48:26,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2024-11-14 05:48:26,895 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 05:48:26,895 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:48:26,896 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-14 05:48:26,897 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:48:27,023 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 05:48:27,023 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:48:27,351 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 05:48:27,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1931492845] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:48:27,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235080198] [2024-11-14 05:48:27,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 05:48:27,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:48:27,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:48:27,354 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:48:27,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-14 05:48:27,421 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 05:48:27,422 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:48:27,424 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-14 05:48:27,425 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:48:27,665 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 05:48:27,666 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:48:29,113 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 05:48:29,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235080198] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:48:29,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 05:48:29,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 14, 14] total 38 [2024-11-14 05:48:29,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088140929] [2024-11-14 05:48:29,114 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 05:48:29,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-14 05:48:29,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:48:29,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-14 05:48:29,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=959, Unknown=0, NotChecked=0, Total=1406 [2024-11-14 05:48:29,117 INFO L87 Difference]: Start difference. First operand 127 states and 181 transitions. Second operand has 38 states, 38 states have (on average 3.8947368421052633) internal successors, (148), 38 states have internal predecessors, (148), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-14 05:48:31,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:48:31,960 INFO L93 Difference]: Finished difference Result 306 states and 436 transitions. [2024-11-14 05:48:31,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-14 05:48:31,962 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.8947368421052633) internal successors, (148), 38 states have internal predecessors, (148), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 80 [2024-11-14 05:48:31,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:48:31,964 INFO L225 Difference]: With dead ends: 306 [2024-11-14 05:48:31,964 INFO L226 Difference]: Without dead ends: 186 [2024-11-14 05:48:31,965 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 439 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=782, Invalid=1474, Unknown=0, NotChecked=0, Total=2256 [2024-11-14 05:48:31,966 INFO L432 NwaCegarLoop]: 85 mSDtfsCounter, 219 mSDsluCounter, 987 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 1072 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:48:31,966 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 1072 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-14 05:48:31,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2024-11-14 05:48:31,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 153. [2024-11-14 05:48:31,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 141 states have (on average 1.4397163120567376) internal successors, (203), 142 states have internal predecessors, (203), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2024-11-14 05:48:31,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 224 transitions. [2024-11-14 05:48:31,980 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 224 transitions. Word has length 80 [2024-11-14 05:48:31,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:48:31,981 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 224 transitions. [2024-11-14 05:48:31,981 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.8947368421052633) internal successors, (148), 38 states have internal predecessors, (148), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-14 05:48:31,981 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 224 transitions. [2024-11-14 05:48:31,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-11-14 05:48:31,983 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:48:31,983 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 13, 4, 4, 4, 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, 1, 1] [2024-11-14 05:48:31,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Ended with exit code 0 [2024-11-14 05:48:32,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2024-11-14 05:48:32,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-14 05:48:32,584 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:48:32,584 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:48:32,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:48:32,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1857262564, now seen corresponding path program 3 times [2024-11-14 05:48:32,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:48:32,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1446000085] [2024-11-14 05:48:32,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:48:32,585 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 05:48:32,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:48:32,588 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 05:48:32,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2024-11-14 05:48:32,693 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2024-11-14 05:48:32,693 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:48:32,696 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-14 05:48:32,699 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:48:34,131 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 10 proven. 282 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 05:48:34,131 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:48:37,054 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 10 proven. 282 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 05:48:37,054 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:48:37,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1446000085] [2024-11-14 05:48:37,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1446000085] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:48:37,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [988003842] [2024-11-14 05:48:37,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:48:37,054 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:48:37,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:48:37,056 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:48:37,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2024-11-14 05:48:37,262 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2024-11-14 05:48:37,262 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:48:37,264 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-14 05:48:37,266 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:48:50,285 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 10 proven. 282 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 05:48:50,285 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:48:51,421 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 10 proven. 282 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 05:48:51,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [988003842] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:48:51,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240520719] [2024-11-14 05:48:51,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:48:51,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:48:51,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:48:51,424 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:48:51,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-14 05:48:51,553 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2024-11-14 05:48:51,553 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:48:51,559 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-14 05:48:51,561 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:48:53,729 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 25 proven. 273 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 05:48:53,729 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:48:56,705 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 4 proven. 282 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 05:48:56,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240520719] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:48:56,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 05:48:56,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 25, 25, 19, 19] total 90 [2024-11-14 05:48:56,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799635250] [2024-11-14 05:48:56,706 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 05:48:56,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2024-11-14 05:48:56,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:48:56,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2024-11-14 05:48:56,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=7224, Unknown=6, NotChecked=0, Total=8010 [2024-11-14 05:48:56,711 INFO L87 Difference]: Start difference. First operand 153 states and 224 transitions. Second operand has 90 states, 90 states have (on average 2.966666666666667) internal successors, (267), 84 states have internal predecessors, (267), 5 states have call successors, (13), 2 states have call predecessors, (13), 8 states have return successors, (16), 11 states have call predecessors, (16), 5 states have call successors, (16) [2024-11-14 05:49:48,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:49:48,602 INFO L93 Difference]: Finished difference Result 560 states and 895 transitions. [2024-11-14 05:49:48,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2024-11-14 05:49:48,603 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.966666666666667) internal successors, (267), 84 states have internal predecessors, (267), 5 states have call successors, (13), 2 states have call predecessors, (13), 8 states have return successors, (16), 11 states have call predecessors, (16), 5 states have call successors, (16) Word has length 91 [2024-11-14 05:49:48,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:49:48,607 INFO L225 Difference]: With dead ends: 560 [2024-11-14 05:49:48,607 INFO L226 Difference]: Without dead ends: 408 [2024-11-14 05:49:48,622 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 717 GetRequests, 466 SyntacticMatches, 3 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17132 ImplicationChecksByTransitivity, 59.0s TimeCoverageRelationStatistics Valid=8255, Invalid=53989, Unknown=6, NotChecked=0, Total=62250 [2024-11-14 05:49:48,623 INFO L432 NwaCegarLoop]: 79 mSDtfsCounter, 3137 mSDsluCounter, 3379 mSDsCounter, 0 mSdLazyCounter, 8472 mSolverCounterSat, 769 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3142 SdHoareTripleChecker+Valid, 3458 SdHoareTripleChecker+Invalid, 9241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 769 IncrementalHoareTripleChecker+Valid, 8472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:49:48,623 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3142 Valid, 3458 Invalid, 9241 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [769 Valid, 8472 Invalid, 0 Unknown, 0 Unchecked, 13.2s Time] [2024-11-14 05:49:48,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2024-11-14 05:49:48,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 183. [2024-11-14 05:49:48,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 168 states have (on average 1.4583333333333333) internal successors, (245), 170 states have internal predecessors, (245), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (28), 9 states have call predecessors, (28), 7 states have call successors, (28) [2024-11-14 05:49:48,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 281 transitions. [2024-11-14 05:49:48,663 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 281 transitions. Word has length 91 [2024-11-14 05:49:48,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:49:48,664 INFO L471 AbstractCegarLoop]: Abstraction has 183 states and 281 transitions. [2024-11-14 05:49:48,664 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.966666666666667) internal successors, (267), 84 states have internal predecessors, (267), 5 states have call successors, (13), 2 states have call predecessors, (13), 8 states have return successors, (16), 11 states have call predecessors, (16), 5 states have call successors, (16) [2024-11-14 05:49:48,664 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 281 transitions. [2024-11-14 05:49:48,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2024-11-14 05:49:48,666 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:49:48,666 INFO L215 NwaCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 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, 1] [2024-11-14 05:49:48,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2024-11-14 05:49:48,869 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Ended with exit code 0 [2024-11-14 05:49:49,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-11-14 05:49:49,267 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:49:49,267 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:49:49,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:49:49,268 INFO L85 PathProgramCache]: Analyzing trace with hash -484460241, now seen corresponding path program 3 times [2024-11-14 05:49:49,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:49:49,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1848843383] [2024-11-14 05:49:49,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:49:49,268 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 05:49:49,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:49:49,270 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 05:49:49,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2024-11-14 05:49:49,439 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2024-11-14 05:49:49,440 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:49:49,443 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-14 05:49:49,445 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:49:50,667 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 25 proven. 737 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 05:49:50,667 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:49:54,818 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 4 proven. 746 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 05:49:54,818 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:49:54,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1848843383] [2024-11-14 05:49:54,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1848843383] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:49:54,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1800543439] [2024-11-14 05:49:54,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:49:54,818 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:49:54,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:49:54,820 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:49:54,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2024-11-14 05:49:55,053 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2024-11-14 05:49:55,053 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:49:55,055 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-14 05:49:55,057 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:49:55,656 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 25 proven. 737 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 05:49:55,656 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:49:56,718 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 4 proven. 746 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 05:49:56,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1800543439] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:49:56,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125489292] [2024-11-14 05:49:56,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:49:56,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:49:56,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:49:56,723 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:49:56,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-14 05:49:56,892 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2024-11-14 05:49:56,892 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:49:56,895 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-14 05:49:56,896 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:49:57,106 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 25 proven. 737 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 05:49:57,106 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:49:58,134 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 4 proven. 746 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 05:49:58,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125489292] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:49:58,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 05:49:58,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26, 26, 26, 26] total 54 [2024-11-14 05:49:58,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326465372] [2024-11-14 05:49:58,134 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 05:49:58,135 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-11-14 05:49:58,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:49:58,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-11-14 05:49:58,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=777, Invalid=2085, Unknown=0, NotChecked=0, Total=2862 [2024-11-14 05:49:58,137 INFO L87 Difference]: Start difference. First operand 183 states and 281 transitions. Second operand has 54 states, 54 states have (on average 3.611111111111111) internal successors, (195), 54 states have internal predecessors, (195), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:50:13,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:50:13,146 INFO L93 Difference]: Finished difference Result 461 states and 689 transitions. [2024-11-14 05:50:13,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-14 05:50:13,147 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.611111111111111) internal successors, (195), 54 states have internal predecessors, (195), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2024-11-14 05:50:13,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:50:13,149 INFO L225 Difference]: With dead ends: 461 [2024-11-14 05:50:13,150 INFO L226 Difference]: Without dead ends: 289 [2024-11-14 05:50:13,151 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 713 GetRequests, 639 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=1965, Invalid=3735, Unknown=0, NotChecked=0, Total=5700 [2024-11-14 05:50:13,152 INFO L432 NwaCegarLoop]: 121 mSDtfsCounter, 706 mSDsluCounter, 3172 mSDsCounter, 0 mSdLazyCounter, 2298 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 3293 SdHoareTripleChecker+Invalid, 2362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 2298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:50:13,152 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [706 Valid, 3293 Invalid, 2362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 2298 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2024-11-14 05:50:13,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2024-11-14 05:50:13,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 233. [2024-11-14 05:50:13,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 218 states have (on average 1.5045871559633028) internal successors, (328), 220 states have internal predecessors, (328), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (28), 9 states have call predecessors, (28), 7 states have call successors, (28) [2024-11-14 05:50:13,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 364 transitions. [2024-11-14 05:50:13,192 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 364 transitions. Word has length 116 [2024-11-14 05:50:13,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:50:13,192 INFO L471 AbstractCegarLoop]: Abstraction has 233 states and 364 transitions. [2024-11-14 05:50:13,192 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.611111111111111) internal successors, (195), 54 states have internal predecessors, (195), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:50:13,192 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 364 transitions. [2024-11-14 05:50:13,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-14 05:50:13,194 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:50:13,194 INFO L215 NwaCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 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, 1, 1, 1, 1, 1] [2024-11-14 05:50:13,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2024-11-14 05:50:13,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2024-11-14 05:50:13,615 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-14 05:50:13,795 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:50:13,796 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:50:13,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:50:13,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1335035799, now seen corresponding path program 1 times [2024-11-14 05:50:13,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:50:13,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1700295969] [2024-11-14 05:50:13,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:50:13,797 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 05:50:13,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:50:13,801 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 05:50:13,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2024-11-14 05:50:13,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:50:13,919 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 05:50:13,922 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:50:13,999 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2024-11-14 05:50:13,999 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:50:14,045 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2024-11-14 05:50:14,045 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:50:14,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1700295969] [2024-11-14 05:50:14,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1700295969] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:50:14,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [583054418] [2024-11-14 05:50:14,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:50:14,046 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:50:14,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:50:14,048 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:50:14,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2024-11-14 05:50:14,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:50:14,168 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 05:50:14,169 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:50:14,197 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2024-11-14 05:50:14,197 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:50:14,257 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2024-11-14 05:50:14,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [583054418] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:50:14,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903091811] [2024-11-14 05:50:14,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:50:14,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:50:14,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:50:14,260 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:50:14,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-14 05:50:14,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:50:14,366 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 05:50:14,368 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:50:14,393 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2024-11-14 05:50:14,393 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:50:14,437 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2024-11-14 05:50:14,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903091811] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:50:14,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 05:50:14,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 8 [2024-11-14 05:50:14,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348650554] [2024-11-14 05:50:14,438 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 05:50:14,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 05:50:14,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:50:14,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 05:50:14,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-14 05:50:14,439 INFO L87 Difference]: Start difference. First operand 233 states and 364 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 05:50:14,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:50:14,540 INFO L93 Difference]: Finished difference Result 241 states and 371 transitions. [2024-11-14 05:50:14,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 05:50:14,541 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 124 [2024-11-14 05:50:14,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:50:14,543 INFO L225 Difference]: With dead ends: 241 [2024-11-14 05:50:14,543 INFO L226 Difference]: Without dead ends: 215 [2024-11-14 05:50:14,544 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 741 GetRequests, 732 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-14 05:50:14,544 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 4 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:50:14,544 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 392 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:50:14,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2024-11-14 05:50:14,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2024-11-14 05:50:14,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 201 states have (on average 1.5223880597014925) internal successors, (306), 204 states have internal predecessors, (306), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2024-11-14 05:50:14,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 332 transitions. [2024-11-14 05:50:14,602 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 332 transitions. Word has length 124 [2024-11-14 05:50:14,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:50:14,602 INFO L471 AbstractCegarLoop]: Abstraction has 215 states and 332 transitions. [2024-11-14 05:50:14,602 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 05:50:14,603 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 332 transitions. [2024-11-14 05:50:14,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-11-14 05:50:14,605 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:50:14,605 INFO L215 NwaCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 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] [2024-11-14 05:50:14,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Ended with exit code 0 [2024-11-14 05:50:14,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2024-11-14 05:50:15,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2024-11-14 05:50:15,206 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:50:15,207 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:50:15,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:50:15,207 INFO L85 PathProgramCache]: Analyzing trace with hash -2045401494, now seen corresponding path program 1 times [2024-11-14 05:50:15,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:50:15,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2065970588] [2024-11-14 05:50:15,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:50:15,208 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 05:50:15,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:50:15,210 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 05:50:15,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2024-11-14 05:50:15,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:50:15,297 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-14 05:50:15,299 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:50:15,393 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2024-11-14 05:50:15,393 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:50:15,394 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:50:15,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2065970588] [2024-11-14 05:50:15,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2065970588] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:50:15,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:50:15,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-14 05:50:15,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089927286] [2024-11-14 05:50:15,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:50:15,395 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 05:50:15,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:50:15,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 05:50:15,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-14 05:50:15,396 INFO L87 Difference]: Start difference. First operand 215 states and 332 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 05:50:15,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:50:15,536 INFO L93 Difference]: Finished difference Result 280 states and 427 transitions. [2024-11-14 05:50:15,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 05:50:15,536 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 125 [2024-11-14 05:50:15,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:50:15,539 INFO L225 Difference]: With dead ends: 280 [2024-11-14 05:50:15,539 INFO L226 Difference]: Without dead ends: 251 [2024-11-14 05:50:15,539 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-14 05:50:15,540 INFO L432 NwaCegarLoop]: 84 mSDtfsCounter, 25 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:50:15,540 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 534 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:50:15,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2024-11-14 05:50:15,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 234. [2024-11-14 05:50:15,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 217 states have (on average 1.5161290322580645) internal successors, (329), 219 states have internal predecessors, (329), 9 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (34), 11 states have call predecessors, (34), 8 states have call successors, (34) [2024-11-14 05:50:15,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 372 transitions. [2024-11-14 05:50:15,573 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 372 transitions. Word has length 125 [2024-11-14 05:50:15,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:50:15,574 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 372 transitions. [2024-11-14 05:50:15,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 05:50:15,574 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 372 transitions. [2024-11-14 05:50:15,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-11-14 05:50:15,575 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:50:15,575 INFO L215 NwaCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 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, 1, 1, 1, 1] [2024-11-14 05:50:15,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Ended with exit code 0 [2024-11-14 05:50:15,776 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 05:50:15,776 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:50:15,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:50:15,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1126844762, now seen corresponding path program 1 times [2024-11-14 05:50:15,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:50:15,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1000319880] [2024-11-14 05:50:15,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:50:15,777 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 05:50:15,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:50:15,779 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 05:50:15,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2024-11-14 05:50:15,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:50:15,895 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 05:50:15,897 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:50:15,996 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2024-11-14 05:50:15,997 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:50:16,143 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2024-11-14 05:50:16,143 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:50:16,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1000319880] [2024-11-14 05:50:16,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1000319880] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:50:16,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1661895700] [2024-11-14 05:50:16,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:50:16,143 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:50:16,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:50:16,145 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:50:16,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2024-11-14 05:50:16,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:50:16,273 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 05:50:16,275 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:50:16,314 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2024-11-14 05:50:16,314 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:50:16,358 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2024-11-14 05:50:16,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1661895700] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:50:16,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207493990] [2024-11-14 05:50:16,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:50:16,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:50:16,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:50:16,360 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:50:16,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-14 05:50:16,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:50:16,447 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 05:50:16,449 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:50:16,473 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2024-11-14 05:50:16,474 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:50:16,520 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2024-11-14 05:50:16,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207493990] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:50:16,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 05:50:16,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 14 [2024-11-14 05:50:16,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403546162] [2024-11-14 05:50:16,520 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 05:50:16,521 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-14 05:50:16,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:50:16,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-14 05:50:16,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-11-14 05:50:16,522 INFO L87 Difference]: Start difference. First operand 234 states and 372 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 12 states have internal predecessors, (43), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-14 05:50:16,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:50:16,706 INFO L93 Difference]: Finished difference Result 268 states and 412 transitions. [2024-11-14 05:50:16,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 05:50:16,707 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 12 states have internal predecessors, (43), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 125 [2024-11-14 05:50:16,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:50:16,709 INFO L225 Difference]: With dead ends: 268 [2024-11-14 05:50:16,709 INFO L226 Difference]: Without dead ends: 249 [2024-11-14 05:50:16,710 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 745 GetRequests, 732 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-11-14 05:50:16,711 INFO L432 NwaCegarLoop]: 81 mSDtfsCounter, 28 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 893 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:50:16,711 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 893 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:50:16,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2024-11-14 05:50:16,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 234. [2024-11-14 05:50:16,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 217 states have (on average 1.5115207373271888) internal successors, (328), 219 states have internal predecessors, (328), 9 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (34), 11 states have call predecessors, (34), 8 states have call successors, (34) [2024-11-14 05:50:16,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 371 transitions. [2024-11-14 05:50:16,770 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 371 transitions. Word has length 125 [2024-11-14 05:50:16,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:50:16,771 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 371 transitions. [2024-11-14 05:50:16,771 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 12 states have internal predecessors, (43), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-14 05:50:16,771 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 371 transitions. [2024-11-14 05:50:16,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-11-14 05:50:16,772 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:50:16,772 INFO L215 NwaCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 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, 1, 1, 1, 1] [2024-11-14 05:50:16,794 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-11-14 05:50:16,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (43)] Ended with exit code 0 [2024-11-14 05:50:17,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Ended with exit code 0 [2024-11-14 05:50:17,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 05:50:17,373 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:50:17,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:50:17,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1713650776, now seen corresponding path program 1 times [2024-11-14 05:50:17,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:50:17,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1940934375] [2024-11-14 05:50:17,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:50:17,374 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 05:50:17,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:50:17,376 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 05:50:17,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2024-11-14 05:50:17,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:50:17,482 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-11-14 05:50:17,486 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:50:20,061 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 4 proven. 839 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 05:50:20,061 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:50:26,548 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 4 proven. 839 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 05:50:26,548 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:50:26,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1940934375] [2024-11-14 05:50:26,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1940934375] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:50:26,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1866876669] [2024-11-14 05:50:26,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:50:26,548 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:50:26,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:50:26,555 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:50:26,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2024-11-14 05:50:26,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:50:26,767 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-11-14 05:50:26,771 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:50:27,371 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 4 proven. 839 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 05:50:27,371 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:50:29,302 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 4 proven. 839 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 05:50:29,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1866876669] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:50:29,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141370173] [2024-11-14 05:50:29,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:50:29,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:50:29,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:50:29,304 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:50:29,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c491da-b510-467b-babb-1c1df7904e90/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-11-14 05:50:29,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:50:29,390 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-14 05:50:29,392 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:50:34,260 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 4 proven. 839 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 05:50:34,260 INFO L311 TraceCheckSpWp]: Computing backward predicates...