./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4886e15-21fe-4ca7-ae31-662b867ad52f/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4886e15-21fe-4ca7-ae31-662b867ad52f/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4886e15-21fe-4ca7-ae31-662b867ad52f/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4886e15-21fe-4ca7-ae31-662b867ad52f/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4886e15-21fe-4ca7-ae31-662b867ad52f/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4886e15-21fe-4ca7-ae31-662b867ad52f/bin/utaipan-verify-DbMuA5NWw2 --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 2abfa4882ab8ec6bd7a33a5fbeaa8a88ba40a897019218fc162e52833c89454b --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:24:27,259 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:24:27,371 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4886e15-21fe-4ca7-ae31-662b867ad52f/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 12:24:27,378 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:24:27,381 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:24:27,417 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:24:27,420 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:24:27,420 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:24:27,421 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:24:27,421 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:24:27,422 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:24:27,422 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:24:27,423 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:24:27,423 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:24:27,424 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:24:27,424 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:24:27,425 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:24:27,425 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:24:27,426 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:24:27,426 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:24:27,427 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:24:27,427 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:24:27,428 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:24:27,428 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:24:27,429 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:24:27,429 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:24:27,430 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:24:27,430 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:24:27,431 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:24:27,431 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:24:27,431 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:24:27,432 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:24:27,432 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:24:27,433 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:24:27,433 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:24:27,433 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:24:27,434 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:24:27,434 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:24:27,435 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:24:27,435 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:24:27,435 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:24:27,438 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:24:27,439 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:24:27,439 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:24:27,439 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:24:27,439 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:24:27,440 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:24:27,440 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4886e15-21fe-4ca7-ae31-662b867ad52f/bin/utaipan-verify-DbMuA5NWw2/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4886e15-21fe-4ca7-ae31-662b867ad52f/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2abfa4882ab8ec6bd7a33a5fbeaa8a88ba40a897019218fc162e52833c89454b [2024-11-02 12:24:27,725 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:24:27,756 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:24:27,758 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:24:27,760 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:24:27,761 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:24:27,762 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4886e15-21fe-4ca7-ae31-662b867ad52f/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c Unable to find full path for "g++" [2024-11-02 12:24:29,935 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:24:30,150 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:24:30,151 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4886e15-21fe-4ca7-ae31-662b867ad52f/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2024-11-02 12:24:30,163 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4886e15-21fe-4ca7-ae31-662b867ad52f/bin/utaipan-verify-DbMuA5NWw2/data/e2e08b4f8/f9cac5956dbb469b8d62dcff269ab26b/FLAG8a2e40e73 [2024-11-02 12:24:30,517 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4886e15-21fe-4ca7-ae31-662b867ad52f/bin/utaipan-verify-DbMuA5NWw2/data/e2e08b4f8/f9cac5956dbb469b8d62dcff269ab26b [2024-11-02 12:24:30,519 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:24:30,521 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:24:30,522 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:24:30,523 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:24:30,530 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:24:30,530 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:24:30" (1/1) ... [2024-11-02 12:24:30,532 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3608f74f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:24:30, skipping insertion in model container [2024-11-02 12:24:30,532 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:24:30" (1/1) ... [2024-11-02 12:24:30,571 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:24:30,762 WARN L251 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_d4886e15-21fe-4ca7-ae31-662b867ad52f/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c[755,768] [2024-11-02 12:24:30,816 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:24:30,832 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:24:30,844 WARN L251 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_d4886e15-21fe-4ca7-ae31-662b867ad52f/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c[755,768] [2024-11-02 12:24:30,877 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:24:30,897 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:24:30,897 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:24:30 WrapperNode [2024-11-02 12:24:30,898 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:24:30,899 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:24:30,899 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:24:30,899 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:24:30,906 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:24:30" (1/1) ... [2024-11-02 12:24:30,915 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:24:30" (1/1) ... [2024-11-02 12:24:30,934 INFO L138 Inliner]: procedures = 17, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 56 [2024-11-02 12:24:30,935 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:24:30,936 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:24:30,936 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:24:30,936 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:24:30,947 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:24:30" (1/1) ... [2024-11-02 12:24:30,947 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:24:30" (1/1) ... [2024-11-02 12:24:30,949 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:24:30" (1/1) ... [2024-11-02 12:24:30,950 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:24:30" (1/1) ... [2024-11-02 12:24:30,955 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:24:30" (1/1) ... [2024-11-02 12:24:30,968 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:24:30" (1/1) ... [2024-11-02 12:24:30,971 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:24:30" (1/1) ... [2024-11-02 12:24:30,973 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:24:30" (1/1) ... [2024-11-02 12:24:30,975 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:24:30,976 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:24:30,976 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:24:30,976 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:24:30,977 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:24:30" (1/1) ... [2024-11-02 12:24:30,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:24:31,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4886e15-21fe-4ca7-ae31-662b867ad52f/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:24:31,020 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4886e15-21fe-4ca7-ae31-662b867ad52f/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:24:31,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4886e15-21fe-4ca7-ae31-662b867ad52f/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:24:31,060 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:24:31,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:24:31,060 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-11-02 12:24:31,062 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-11-02 12:24:31,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:24:31,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:24:31,063 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2024-11-02 12:24:31,063 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2024-11-02 12:24:31,063 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-02 12:24:31,063 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-02 12:24:31,157 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:24:31,160 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:24:31,638 INFO L? ?]: Removed 52 outVars from TransFormulas that were not future-live. [2024-11-02 12:24:31,639 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:24:31,855 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:24:31,855 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-02 12:24:31,856 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:24:31 BoogieIcfgContainer [2024-11-02 12:24:31,856 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:24:31,858 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:24:31,859 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:24:31,862 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:24:31,863 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:24:30" (1/3) ... [2024-11-02 12:24:31,864 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f729cb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:24:31, skipping insertion in model container [2024-11-02 12:24:31,864 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:24:30" (2/3) ... [2024-11-02 12:24:31,864 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f729cb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:24:31, skipping insertion in model container [2024-11-02 12:24:31,864 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:24:31" (3/3) ... [2024-11-02 12:24:31,866 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_4-2a.c.cil.c [2024-11-02 12:24:31,885 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:24:31,885 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 12:24:31,963 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:24:31,967 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;@42ce451b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:24:31,968 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 12:24:31,971 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 31 states have internal predecessors, (44), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-02 12:24:31,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-02 12:24:31,980 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:24:31,980 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:24:31,981 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:24:31,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:24:31,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1341316433, now seen corresponding path program 1 times [2024-11-02 12:24:32,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:24:32,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130855473] [2024-11-02 12:24:32,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:24:32,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:24:32,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:24:32,799 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-02 12:24:32,800 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:24:32,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130855473] [2024-11-02 12:24:32,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130855473] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:24:32,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:24:32,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-02 12:24:32,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306483890] [2024-11-02 12:24:32,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:24:32,807 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-02 12:24:32,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:24:32,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-02 12:24:32,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-02 12:24:32,837 INFO L87 Difference]: Start difference. First operand has 43 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 31 states have internal predecessors, (44), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 10 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-02 12:24:33,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:24:33,071 INFO L93 Difference]: Finished difference Result 106 states and 164 transitions. [2024-11-02 12:24:33,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-02 12:24:33,075 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2024-11-02 12:24:33,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:24:33,088 INFO L225 Difference]: With dead ends: 106 [2024-11-02 12:24:33,088 INFO L226 Difference]: Without dead ends: 61 [2024-11-02 12:24:33,093 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-02 12:24:33,100 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:24:33,101 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 287 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:24:33,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-02 12:24:33,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2024-11-02 12:24:33,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 38 states have internal predecessors, (47), 11 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2024-11-02 12:24:33,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 72 transitions. [2024-11-02 12:24:33,145 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 72 transitions. Word has length 26 [2024-11-02 12:24:33,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:24:33,146 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 72 transitions. [2024-11-02 12:24:33,146 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-02 12:24:33,146 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 72 transitions. [2024-11-02 12:24:33,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-02 12:24:33,148 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:24:33,148 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:24:33,149 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:24:33,149 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:24:33,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:24:33,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1276087602, now seen corresponding path program 1 times [2024-11-02 12:24:33,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:24:33,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448144323] [2024-11-02 12:24:33,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:24:33,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:24:33,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:24:44,737 WARN L873 $PredicateComparison]: unable to prove that (or (< 16777215 (mod c_base2flt_~__retres4~0 4294967296)) (< (+ |c_base2flt_#in~e| 128) 0) (< (mod (+ 4294967295 c_base2flt_~__retres4~0) 4294967296) 33554431) (let ((.cse0 (* |c_base2flt_#in~e| 16777216))) (< (mod (+ .cse0 (* 4294967295 c_base2flt_~__retres4~0) 2147483648) 4294967296) (+ 2147483649 .cse0)))) is different from true [2024-11-02 12:24:51,114 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 1 not checked. [2024-11-02 12:24:51,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:24:51,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448144323] [2024-11-02 12:24:51,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448144323] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:24:51,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212168074] [2024-11-02 12:24:51,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:24:51,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:24:51,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4886e15-21fe-4ca7-ae31-662b867ad52f/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:24:51,120 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4886e15-21fe-4ca7-ae31-662b867ad52f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:24:51,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4886e15-21fe-4ca7-ae31-662b867ad52f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:24:51,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:24:51,250 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-02 12:24:51,255 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:24:51,372 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-02 12:24:51,373 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:24:51,689 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-02 12:24:51,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212168074] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:24:51,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [249123122] [2024-11-02 12:24:51,710 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-02 12:24:51,710 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:24:51,714 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:24:51,719 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:24:51,720 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:24:53,074 INFO L197 IcfgInterpreter]: Interpreting procedure addflt with input of size 3 for LOIs [2024-11-02 12:24:53,128 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2024-11-02 12:24:53,141 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 11 for LOIs [2024-11-02 12:24:53,318 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:24:56,484 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '476#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-02 12:24:56,484 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:24:56,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:24:56,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 20 [2024-11-02 12:24:56,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607119742] [2024-11-02 12:24:56,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:24:56,487 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-02 12:24:56,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:24:56,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-02 12:24:56,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1128, Unknown=1, NotChecked=68, Total=1332 [2024-11-02 12:24:56,491 INFO L87 Difference]: Start difference. First operand 53 states and 72 transitions. Second operand has 20 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-02 12:24:57,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:24:57,074 INFO L93 Difference]: Finished difference Result 96 states and 127 transitions. [2024-11-02 12:24:57,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-02 12:24:57,076 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) Word has length 30 [2024-11-02 12:24:57,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:24:57,077 INFO L225 Difference]: With dead ends: 96 [2024-11-02 12:24:57,078 INFO L226 Difference]: Without dead ends: 75 [2024-11-02 12:24:57,079 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=150, Invalid=1335, Unknown=1, NotChecked=74, Total=1560 [2024-11-02 12:24:57,080 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 25 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-02 12:24:57,081 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 280 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 257 Invalid, 0 Unknown, 104 Unchecked, 0.4s Time] [2024-11-02 12:24:57,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-02 12:24:57,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 63. [2024-11-02 12:24:57,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 43 states have (on average 1.255813953488372) internal successors, (54), 45 states have internal predecessors, (54), 12 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2024-11-02 12:24:57,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 81 transitions. [2024-11-02 12:24:57,135 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 81 transitions. Word has length 30 [2024-11-02 12:24:57,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:24:57,135 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 81 transitions. [2024-11-02 12:24:57,135 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-02 12:24:57,136 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 81 transitions. [2024-11-02 12:24:57,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-02 12:24:57,142 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:24:57,142 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:24:57,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4886e15-21fe-4ca7-ae31-662b867ad52f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-02 12:24:57,343 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4886e15-21fe-4ca7-ae31-662b867ad52f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2024-11-02 12:24:57,344 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:24:57,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:24:57,344 INFO L85 PathProgramCache]: Analyzing trace with hash -319618958, now seen corresponding path program 2 times [2024-11-02 12:24:57,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:24:57,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824905726] [2024-11-02 12:24:57,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:24:57,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:24:57,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:24:57,721 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-02 12:24:57,721 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:24:57,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824905726] [2024-11-02 12:24:57,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824905726] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:24:57,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:24:57,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-02 12:24:57,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825878617] [2024-11-02 12:24:57,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:24:57,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-02 12:24:57,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:24:57,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-02 12:24:57,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-02 12:24:57,727 INFO L87 Difference]: Start difference. First operand 63 states and 81 transitions. Second operand has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-02 12:24:57,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:24:57,879 INFO L93 Difference]: Finished difference Result 94 states and 120 transitions. [2024-11-02 12:24:57,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-02 12:24:57,880 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2024-11-02 12:24:57,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:24:57,882 INFO L225 Difference]: With dead ends: 94 [2024-11-02 12:24:57,882 INFO L226 Difference]: Without dead ends: 73 [2024-11-02 12:24:57,883 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-02 12:24:57,886 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 5 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:24:57,887 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 290 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:24:57,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-02 12:24:57,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2024-11-02 12:24:57,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 43 states have (on average 1.255813953488372) internal successors, (54), 45 states have internal predecessors, (54), 12 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2024-11-02 12:24:57,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 81 transitions. [2024-11-02 12:24:57,904 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 81 transitions. Word has length 30 [2024-11-02 12:24:57,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:24:57,905 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 81 transitions. [2024-11-02 12:24:57,905 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-02 12:24:57,905 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 81 transitions. [2024-11-02 12:24:57,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-02 12:24:57,907 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:24:57,907 INFO L215 NwaCegarLoop]: trace histogram [3, 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] [2024-11-02 12:24:57,907 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 12:24:57,907 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:24:57,908 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:24:57,908 INFO L85 PathProgramCache]: Analyzing trace with hash -852904208, now seen corresponding path program 1 times [2024-11-02 12:24:57,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:24:57,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747772516] [2024-11-02 12:24:57,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:24:57,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:24:57,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:24:58,450 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-02 12:24:58,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:24:58,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747772516] [2024-11-02 12:24:58,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747772516] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:24:58,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:24:58,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2024-11-02 12:24:58,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510703124] [2024-11-02 12:24:58,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:24:58,452 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-02 12:24:58,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:24:58,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-02 12:24:58,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2024-11-02 12:24:58,454 INFO L87 Difference]: Start difference. First operand 63 states and 81 transitions. Second operand has 17 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-02 12:24:58,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:24:58,854 INFO L93 Difference]: Finished difference Result 79 states and 100 transitions. [2024-11-02 12:24:58,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-02 12:24:58,855 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 35 [2024-11-02 12:24:58,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:24:58,857 INFO L225 Difference]: With dead ends: 79 [2024-11-02 12:24:58,858 INFO L226 Difference]: Without dead ends: 59 [2024-11-02 12:24:58,859 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2024-11-02 12:24:58,860 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 17 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 12:24:58,861 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 446 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 12:24:58,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-02 12:24:58,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2024-11-02 12:24:58,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 37 states have internal predecessors, (46), 10 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-02 12:24:58,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2024-11-02 12:24:58,879 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 35 [2024-11-02 12:24:58,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:24:58,881 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2024-11-02 12:24:58,881 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-02 12:24:58,882 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2024-11-02 12:24:58,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-02 12:24:58,886 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:24:58,886 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:24:58,886 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 12:24:58,886 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:24:58,887 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:24:58,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1477916627, now seen corresponding path program 3 times [2024-11-02 12:24:58,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:24:58,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279175462] [2024-11-02 12:24:58,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:24:58,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:24:59,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:25:00,179 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-02 12:25:00,180 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:25:00,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279175462] [2024-11-02 12:25:00,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279175462] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:25:00,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179661091] [2024-11-02 12:25:00,181 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-02 12:25:00,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:25:00,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4886e15-21fe-4ca7-ae31-662b867ad52f/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:25:00,183 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4886e15-21fe-4ca7-ae31-662b867ad52f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:25:00,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4886e15-21fe-4ca7-ae31-662b867ad52f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 12:25:00,373 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-02 12:25:00,373 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:25:00,379 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-02 12:25:00,382 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:25:01,280 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-02 12:25:01,280 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:25:01,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179661091] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:25:01,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:25:01,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2024-11-02 12:25:01,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982272847] [2024-11-02 12:25:01,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:25:01,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-02 12:25:01,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:25:01,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-02 12:25:01,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-11-02 12:25:01,283 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-02 12:25:01,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:25:01,415 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2024-11-02 12:25:01,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 12:25:01,416 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 34 [2024-11-02 12:25:01,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:25:01,417 INFO L225 Difference]: With dead ends: 57 [2024-11-02 12:25:01,417 INFO L226 Difference]: Without dead ends: 55 [2024-11-02 12:25:01,418 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-11-02 12:25:01,419 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 3 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:25:01,419 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 199 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:25:01,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-02 12:25:01,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-11-02 12:25:01,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 40 states have internal predecessors, (49), 10 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-02 12:25:01,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2024-11-02 12:25:01,428 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 34 [2024-11-02 12:25:01,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:25:01,429 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2024-11-02 12:25:01,429 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-02 12:25:01,429 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2024-11-02 12:25:01,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-02 12:25:01,430 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:25:01,431 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:25:01,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4886e15-21fe-4ca7-ae31-662b867ad52f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-02 12:25:01,634 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4886e15-21fe-4ca7-ae31-662b867ad52f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:25:01,635 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:25:01,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:25:01,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1720822737, now seen corresponding path program 1 times [2024-11-02 12:25:01,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:25:01,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457264825] [2024-11-02 12:25:01,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:25:01,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:25:01,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:25:02,634 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-02 12:25:02,635 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:25:02,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457264825] [2024-11-02 12:25:02,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457264825] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:25:02,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489209423] [2024-11-02 12:25:02,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:25:02,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:25:02,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4886e15-21fe-4ca7-ae31-662b867ad52f/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:25:02,639 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4886e15-21fe-4ca7-ae31-662b867ad52f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:25:02,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4886e15-21fe-4ca7-ae31-662b867ad52f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 12:25:02,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:25:02,746 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-02 12:25:02,749 INFO L278 TraceCheckSpWp]: Computing forward predicates...