./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 a0165632 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_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje --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-a016563 [2024-11-09 05:52:31,738 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 05:52:31,859 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 05:52:31,868 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 05:52:31,870 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 05:52:31,905 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 05:52:31,906 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 05:52:31,906 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 05:52:31,907 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 05:52:31,908 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 05:52:31,909 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 05:52:31,909 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 05:52:31,910 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 05:52:31,911 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 05:52:31,911 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 05:52:31,912 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 05:52:31,912 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 05:52:31,913 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 05:52:31,914 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 05:52:31,914 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 05:52:31,915 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 05:52:31,916 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 05:52:31,917 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 05:52:31,917 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 05:52:31,918 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 05:52:31,919 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 05:52:31,919 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 05:52:31,920 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 05:52:31,920 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 05:52:31,921 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 05:52:31,921 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 05:52:31,922 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 05:52:31,922 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 05:52:31,923 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 05:52:31,923 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 05:52:31,924 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 05:52:31,924 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 05:52:31,925 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 05:52:31,925 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:52:31,926 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 05:52:31,927 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 05:52:31,927 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 05:52:31,928 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 05:52:31,928 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 05:52:31,929 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 05:52:31,929 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 05:52:31,929 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 05:52:31,930 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_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2abfa4882ab8ec6bd7a33a5fbeaa8a88ba40a897019218fc162e52833c89454b [2024-11-09 05:52:32,268 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 05:52:32,306 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 05:52:32,310 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 05:52:32,311 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 05:52:32,313 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 05:52:32,315 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c Unable to find full path for "g++" [2024-11-09 05:52:34,789 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 05:52:35,058 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 05:52:35,059 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2024-11-09 05:52:35,075 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/data/f49ba3d19/a9a8ef7cc3b0425c86bfe7d8d18c5519/FLAGc8f38b380 [2024-11-09 05:52:35,098 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/data/f49ba3d19/a9a8ef7cc3b0425c86bfe7d8d18c5519 [2024-11-09 05:52:35,101 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 05:52:35,103 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 05:52:35,104 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 05:52:35,104 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 05:52:35,110 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 05:52:35,111 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:52:35" (1/1) ... [2024-11-09 05:52:35,112 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a9b5351 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:52:35, skipping insertion in model container [2024-11-09 05:52:35,112 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:52:35" (1/1) ... [2024-11-09 05:52:35,149 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 05:52:35,381 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_761d93a1-af50-4f51-b370-564d8c51e43c/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c[755,768] [2024-11-09 05:52:35,472 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:52:35,491 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 05:52:35,507 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_761d93a1-af50-4f51-b370-564d8c51e43c/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c[755,768] [2024-11-09 05:52:35,550 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:52:35,574 INFO L204 MainTranslator]: Completed translation [2024-11-09 05:52:35,575 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:52:35 WrapperNode [2024-11-09 05:52:35,575 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 05:52:35,576 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 05:52:35,577 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 05:52:35,577 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 05:52:35,587 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:52:35" (1/1) ... [2024-11-09 05:52:35,598 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:52:35" (1/1) ... [2024-11-09 05:52:35,623 INFO L138 Inliner]: procedures = 17, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 56 [2024-11-09 05:52:35,624 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 05:52:35,625 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 05:52:35,625 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 05:52:35,625 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 05:52:35,639 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:52:35" (1/1) ... [2024-11-09 05:52:35,639 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:52:35" (1/1) ... [2024-11-09 05:52:35,642 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:52:35" (1/1) ... [2024-11-09 05:52:35,642 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:52:35" (1/1) ... [2024-11-09 05:52:35,654 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:52:35" (1/1) ... [2024-11-09 05:52:35,671 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:52:35" (1/1) ... [2024-11-09 05:52:35,677 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:52:35" (1/1) ... [2024-11-09 05:52:35,679 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:52:35" (1/1) ... [2024-11-09 05:52:35,684 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 05:52:35,686 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 05:52:35,686 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 05:52:35,686 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 05:52:35,687 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:52:35" (1/1) ... [2024-11-09 05:52:35,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:52:35,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:52:35,732 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 05:52:35,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 05:52:35,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 05:52:35,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 05:52:35,768 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-11-09 05:52:35,769 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-11-09 05:52:35,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 05:52:35,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 05:52:35,769 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2024-11-09 05:52:35,769 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2024-11-09 05:52:35,770 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-09 05:52:35,770 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-09 05:52:35,855 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 05:52:35,857 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 05:52:36,319 INFO L? ?]: Removed 52 outVars from TransFormulas that were not future-live. [2024-11-09 05:52:36,319 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 05:52:36,615 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 05:52:36,615 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-09 05:52:36,616 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:52:36 BoogieIcfgContainer [2024-11-09 05:52:36,616 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 05:52:36,619 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 05:52:36,619 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 05:52:36,624 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 05:52:36,624 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 05:52:35" (1/3) ... [2024-11-09 05:52:36,625 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ef180b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:52:36, skipping insertion in model container [2024-11-09 05:52:36,626 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:52:35" (2/3) ... [2024-11-09 05:52:36,626 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ef180b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:52:36, skipping insertion in model container [2024-11-09 05:52:36,626 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:52:36" (3/3) ... [2024-11-09 05:52:36,628 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_4-2a.c.cil.c [2024-11-09 05:52:36,652 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 05:52:36,652 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 05:52:36,734 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 05:52:36,743 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;@29edb32, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 05:52:36,743 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 05:52:36,749 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) [2024-11-09 05:52:36,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-09 05:52:36,760 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:52:36,761 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] [2024-11-09 05:52:36,762 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:52:36,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:52:36,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1295792849, now seen corresponding path program 1 times [2024-11-09 05:52:36,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:52:36,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729651888] [2024-11-09 05:52:36,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:52:36,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:52:37,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:52:37,874 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 05:52:37,875 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:52:37,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729651888] [2024-11-09 05:52:37,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729651888] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:52:37,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:52:37,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-09 05:52:37,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348581850] [2024-11-09 05:52:37,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:52:37,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 05:52:37,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:52:37,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 05:52:37,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-09 05:52:37,918 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) [2024-11-09 05:52:38,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:52:38,205 INFO L93 Difference]: Finished difference Result 106 states and 164 transitions. [2024-11-09 05:52:38,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 05:52:38,210 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 [2024-11-09 05:52:38,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:52:38,226 INFO L225 Difference]: With dead ends: 106 [2024-11-09 05:52:38,226 INFO L226 Difference]: Without dead ends: 61 [2024-11-09 05:52:38,231 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 [2024-11-09 05:52:38,241 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2024-11-09 05:52:38,242 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] [2024-11-09 05:52:38,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-09 05:52:38,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2024-11-09 05:52:38,304 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) [2024-11-09 05:52:38,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 72 transitions. [2024-11-09 05:52:38,309 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 72 transitions. Word has length 26 [2024-11-09 05:52:38,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:52:38,310 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 72 transitions. [2024-11-09 05:52:38,310 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) [2024-11-09 05:52:38,310 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 72 transitions. [2024-11-09 05:52:38,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-09 05:52:38,313 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:52:38,313 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] [2024-11-09 05:52:38,314 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 05:52:38,314 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:52:38,315 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:52:38,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1263092063, now seen corresponding path program 1 times [2024-11-09 05:52:38,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:52:38,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321570536] [2024-11-09 05:52:38,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:52:38,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:52:38,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:52:38,993 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 05:52:38,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:52:38,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321570536] [2024-11-09 05:52:38,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321570536] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:52:38,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590707400] [2024-11-09 05:52:38,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:52:38,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:52:38,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:52:38,998 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:52:39,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 05:52:39,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:52:39,145 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-09 05:52:39,157 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:52:39,418 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 05:52:39,418 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:52:40,077 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 05:52:40,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590707400] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:52:40,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [808121517] [2024-11-09 05:52:40,114 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-09 05:52:40,114 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:52:40,119 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:52:40,127 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:52:40,128 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:52:40,694 INFO L197 IcfgInterpreter]: Interpreting procedure addflt with input of size 12 for LOIs [2024-11-09 05:52:40,806 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2024-11-09 05:52:40,816 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 46 for LOIs [2024-11-09 05:52:41,114 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:52:42,957 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 [2024-11-09 05:52:42,957 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:52:42,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:52:42,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 20 [2024-11-09 05:52:42,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251397525] [2024-11-09 05:52:42,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:52:42,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 05:52:42,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:52:42,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 05:52:42,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1297, Unknown=0, NotChecked=0, Total=1406 [2024-11-09 05:52:42,963 INFO L87 Difference]: Start difference. First operand 53 states and 72 transitions. Second operand has 20 states, 13 states have (on average 2.076923076923077) internal successors, (27), 14 states have internal predecessors, (27), 6 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-09 05:52:43,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:52:43,481 INFO L93 Difference]: Finished difference Result 102 states and 141 transitions. [2024-11-09 05:52:43,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-09 05:52:43,483 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 13 states have (on average 2.076923076923077) internal successors, (27), 14 states have internal predecessors, (27), 6 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 30 [2024-11-09 05:52:43,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:52:43,485 INFO L225 Difference]: With dead ends: 102 [2024-11-09 05:52:43,485 INFO L226 Difference]: Without dead ends: 81 [2024-11-09 05:52:43,489 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=120, Invalid=1440, Unknown=0, NotChecked=0, Total=1560 [2024-11-09 05:52:43,490 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 21 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:52:43,491 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 556 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 05:52:43,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-09 05:52:43,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 61. [2024-11-09 05:52:43,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 44 states have internal predecessors, (52), 12 states have call successors, (12), 5 states have call predecessors, (12), 7 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2024-11-09 05:52:43,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 83 transitions. [2024-11-09 05:52:43,516 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 83 transitions. Word has length 30 [2024-11-09 05:52:43,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:52:43,517 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 83 transitions. [2024-11-09 05:52:43,518 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 13 states have (on average 2.076923076923077) internal successors, (27), 14 states have internal predecessors, (27), 6 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-09 05:52:43,518 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 83 transitions. [2024-11-09 05:52:43,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-09 05:52:43,520 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:52:43,520 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] [2024-11-09 05:52:43,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 05:52:43,723 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:52:43,724 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:52:43,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:52:43,725 INFO L85 PathProgramCache]: Analyzing trace with hash 523438702, now seen corresponding path program 1 times [2024-11-09 05:52:43,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:52:43,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071438955] [2024-11-09 05:52:43,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:52:43,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:52:43,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:52:44,376 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 05:52:44,376 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:52:44,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071438955] [2024-11-09 05:52:44,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071438955] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:52:44,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:52:44,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2024-11-09 05:52:44,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492996330] [2024-11-09 05:52:44,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:52:44,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 05:52:44,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:52:44,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 05:52:44,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2024-11-09 05:52:44,383 INFO L87 Difference]: Start difference. First operand 61 states and 83 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) [2024-11-09 05:52:44,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:52:44,754 INFO L93 Difference]: Finished difference Result 81 states and 107 transitions. [2024-11-09 05:52:44,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-09 05:52:44,754 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 [2024-11-09 05:52:44,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:52:44,756 INFO L225 Difference]: With dead ends: 81 [2024-11-09 05:52:44,756 INFO L226 Difference]: Without dead ends: 69 [2024-11-09 05:52:44,757 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 [2024-11-09 05:52:44,758 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 16 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:52:44,759 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 481 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 05:52:44,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-09 05:52:44,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 61. [2024-11-09 05:52:44,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 44 states have internal predecessors, (52), 12 states have call successors, (12), 5 states have call predecessors, (12), 7 states have return successors, (18), 11 states have call predecessors, (18), 11 states have call successors, (18) [2024-11-09 05:52:44,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 82 transitions. [2024-11-09 05:52:44,772 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 82 transitions. Word has length 35 [2024-11-09 05:52:44,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:52:44,773 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 82 transitions. [2024-11-09 05:52:44,773 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) [2024-11-09 05:52:44,773 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 82 transitions. [2024-11-09 05:52:44,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-09 05:52:44,774 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:52:44,775 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] [2024-11-09 05:52:44,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 05:52:44,775 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:52:44,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:52:44,775 INFO L85 PathProgramCache]: Analyzing trace with hash -490791311, now seen corresponding path program 2 times [2024-11-09 05:52:44,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:52:44,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677237481] [2024-11-09 05:52:44,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:52:44,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:52:44,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:52:45,430 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 05:52:45,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:52:45,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677237481] [2024-11-09 05:52:45,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677237481] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:52:45,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:52:45,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-11-09 05:52:45,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100927796] [2024-11-09 05:52:45,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:52:45,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 05:52:45,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:52:45,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 05:52:45,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2024-11-09 05:52:45,437 INFO L87 Difference]: Start difference. First operand 61 states and 82 transitions. Second operand has 13 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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) [2024-11-09 05:52:45,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:52:45,854 INFO L93 Difference]: Finished difference Result 98 states and 133 transitions. [2024-11-09 05:52:45,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 05:52:45,854 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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 34 [2024-11-09 05:52:45,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:52:45,856 INFO L225 Difference]: With dead ends: 98 [2024-11-09 05:52:45,856 INFO L226 Difference]: Without dead ends: 96 [2024-11-09 05:52:45,857 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2024-11-09 05:52:45,858 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 29 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:52:45,858 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 675 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 05:52:45,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-09 05:52:45,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 82. [2024-11-09 05:52:45,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 58 states have internal predecessors, (70), 17 states have call successors, (17), 7 states have call predecessors, (17), 9 states have return successors, (25), 16 states have call predecessors, (25), 16 states have call successors, (25) [2024-11-09 05:52:45,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 112 transitions. [2024-11-09 05:52:45,878 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 112 transitions. Word has length 34 [2024-11-09 05:52:45,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:52:45,878 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 112 transitions. [2024-11-09 05:52:45,879 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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) [2024-11-09 05:52:45,879 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 112 transitions. [2024-11-09 05:52:45,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-09 05:52:45,881 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:52:45,881 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-09 05:52:45,882 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 05:52:45,882 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:52:45,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:52:45,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1303157855, now seen corresponding path program 1 times [2024-11-09 05:52:45,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:52:45,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502397072] [2024-11-09 05:52:45,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:52:45,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:52:45,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:52:46,595 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 05:52:46,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:52:46,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502397072] [2024-11-09 05:52:46,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502397072] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:52:46,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461581837] [2024-11-09 05:52:46,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:52:46,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:52:46,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:52:46,600 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:52:46,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 05:52:46,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:52:46,772 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-09 05:52:46,775 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:52:47,030 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 05:52:47,030 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:52:47,302 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 05:52:47,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461581837] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 05:52:47,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 05:52:47,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11, 11] total 15 [2024-11-09 05:52:47,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878780577] [2024-11-09 05:52:47,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:52:47,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 05:52:47,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:52:47,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 05:52:47,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2024-11-09 05:52:47,306 INFO L87 Difference]: Start difference. First operand 82 states and 112 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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) [2024-11-09 05:52:47,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:52:47,418 INFO L93 Difference]: Finished difference Result 88 states and 117 transitions. [2024-11-09 05:52:47,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 05:52:47,419 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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 [2024-11-09 05:52:47,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:52:47,421 INFO L225 Difference]: With dead ends: 88 [2024-11-09 05:52:47,421 INFO L226 Difference]: Without dead ends: 86 [2024-11-09 05:52:47,422 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2024-11-09 05:52:47,423 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 3 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:52:47,423 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 209 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:52:47,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-09 05:52:47,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 65. [2024-11-09 05:52:47,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 44 states have (on average 1.25) internal successors, (55), 47 states have internal predecessors, (55), 12 states have call successors, (12), 6 states have call predecessors, (12), 8 states have return successors, (18), 11 states have call predecessors, (18), 11 states have call successors, (18) [2024-11-09 05:52:47,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 85 transitions. [2024-11-09 05:52:47,440 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 85 transitions. Word has length 34 [2024-11-09 05:52:47,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:52:47,441 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 85 transitions. [2024-11-09 05:52:47,441 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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) [2024-11-09 05:52:47,441 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 85 transitions. [2024-11-09 05:52:47,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-09 05:52:47,443 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:52:47,443 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] [2024-11-09 05:52:47,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-09 05:52:47,647 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:52:47,648 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:52:47,649 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:52:47,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1853370210, now seen corresponding path program 1 times [2024-11-09 05:52:47,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:52:47,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949048208] [2024-11-09 05:52:47,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:52:47,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:52:47,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:52:48,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 05:52:48,424 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:52:48,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949048208] [2024-11-09 05:52:48,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949048208] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:52:48,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431597666] [2024-11-09 05:52:48,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:52:48,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:52:48,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:52:48,428 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:52:48,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 05:52:48,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:52:48,522 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-09 05:52:48,525 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:52:49,085 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 05:52:49,085 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:52:50,675 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 05:52:50,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431597666] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:52:50,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1876645166] [2024-11-09 05:52:50,681 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2024-11-09 05:52:50,682 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:52:50,682 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:52:50,683 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:52:50,684 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:52:51,382 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 96 for LOIs [2024-11-09 05:52:51,564 INFO L197 IcfgInterpreter]: Interpreting procedure addflt with input of size 12 for LOIs [2024-11-09 05:52:51,592 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 46 for LOIs [2024-11-09 05:52:51,698 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:52:57,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1876645166] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:52:57,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:52:57,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [18, 18, 18] total 62 [2024-11-09 05:52:57,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903044858] [2024-11-09 05:52:57,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:52:57,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-09 05:52:57,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:52:57,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-09 05:52:57,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=3579, Unknown=0, NotChecked=0, Total=3782 [2024-11-09 05:52:57,170 INFO L87 Difference]: Start difference. First operand 65 states and 85 transitions. Second operand has 25 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 16 states have internal predecessors, (20), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-09 05:52:59,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:52:59,391 INFO L93 Difference]: Finished difference Result 130 states and 174 transitions. [2024-11-09 05:52:59,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-09 05:52:59,392 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 16 states have internal predecessors, (20), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 39 [2024-11-09 05:52:59,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:52:59,394 INFO L225 Difference]: With dead ends: 130 [2024-11-09 05:52:59,394 INFO L226 Difference]: Without dead ends: 108 [2024-11-09 05:52:59,396 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=259, Invalid=4571, Unknown=0, NotChecked=0, Total=4830 [2024-11-09 05:52:59,397 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 52 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 05:52:59,398 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 161 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 05:52:59,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-11-09 05:52:59,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 91. [2024-11-09 05:52:59,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 61 states have (on average 1.278688524590164) internal successors, (78), 66 states have internal predecessors, (78), 18 states have call successors, (18), 7 states have call predecessors, (18), 11 states have return successors, (31), 17 states have call predecessors, (31), 17 states have call successors, (31) [2024-11-09 05:52:59,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 127 transitions. [2024-11-09 05:52:59,428 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 127 transitions. Word has length 39 [2024-11-09 05:52:59,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:52:59,429 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 127 transitions. [2024-11-09 05:52:59,429 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 16 states have internal predecessors, (20), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-09 05:52:59,430 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 127 transitions. [2024-11-09 05:52:59,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-09 05:52:59,431 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:52:59,431 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] [2024-11-09 05:52:59,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 05:52:59,632 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:52:59,633 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:52:59,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:52:59,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1581883026, now seen corresponding path program 1 times [2024-11-09 05:52:59,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:52:59,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439195340] [2024-11-09 05:52:59,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:52:59,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:52:59,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:53:01,726 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 05:53:01,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:53:01,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439195340] [2024-11-09 05:53:01,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439195340] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:53:01,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255071384] [2024-11-09 05:53:01,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:53:01,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:53:01,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:53:01,730 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:53:01,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 05:53:01,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:53:01,847 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-09 05:53:01,852 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:02,937 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 05:53:02,937 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:53:04,925 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-09 05:53:04,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255071384] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 05:53:04,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 05:53:04,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [26, 15] total 45 [2024-11-09 05:53:04,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743760605] [2024-11-09 05:53:04,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:53:04,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 05:53:04,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:53:04,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 05:53:04,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1855, Unknown=0, NotChecked=0, Total=1980 [2024-11-09 05:53:04,931 INFO L87 Difference]: Start difference. First operand 91 states and 127 transitions. Second operand has 14 states, 10 states have (on average 2.3) internal successors, (23), 11 states have internal predecessors, (23), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 05:53:05,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:53:05,293 INFO L93 Difference]: Finished difference Result 104 states and 142 transitions. [2024-11-09 05:53:05,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 05:53:05,294 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 2.3) internal successors, (23), 11 states have internal predecessors, (23), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2024-11-09 05:53:05,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:53:05,295 INFO L225 Difference]: With dead ends: 104 [2024-11-09 05:53:05,296 INFO L226 Difference]: Without dead ends: 80 [2024-11-09 05:53:05,297 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2024-11-09 05:53:05,298 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 3 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:53:05,298 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 448 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:53:05,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-11-09 05:53:05,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 51. [2024-11-09 05:53:05,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 38 states have internal predecessors, (46), 9 states have call successors, (9), 4 states have call predecessors, (9), 6 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-09 05:53:05,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2024-11-09 05:53:05,327 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 39 [2024-11-09 05:53:05,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:53:05,328 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2024-11-09 05:53:05,328 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 2.3) internal successors, (23), 11 states have internal predecessors, (23), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 05:53:05,328 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2024-11-09 05:53:05,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-09 05:53:05,330 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:53:05,330 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:53:05,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 05:53:05,534 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:53:05,535 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:53:05,535 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:53:05,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1446587073, now seen corresponding path program 1 times [2024-11-09 05:53:05,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:53:05,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523980942] [2024-11-09 05:53:05,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:53:05,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:53:05,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 05:53:05,573 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-09 05:53:05,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 05:53:05,641 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2024-11-09 05:53:05,641 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-09 05:53:05,643 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-09 05:53:05,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-09 05:53:05,649 INFO L407 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2024-11-09 05:53:05,694 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-09 05:53:05,702 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 05:53:05 BoogieIcfgContainer [2024-11-09 05:53:05,702 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-09 05:53:05,703 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-09 05:53:05,703 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-09 05:53:05,703 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-09 05:53:05,704 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:52:36" (3/4) ... [2024-11-09 05:53:05,709 INFO L145 WitnessPrinter]: No result that supports witness generation found [2024-11-09 05:53:05,710 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-09 05:53:05,711 INFO L158 Benchmark]: Toolchain (without parser) took 30608.23ms. Allocated memory was 180.4MB in the beginning and 377.5MB in the end (delta: 197.1MB). Free memory was 145.1MB in the beginning and 124.2MB in the end (delta: 20.9MB). Peak memory consumption was 219.8MB. Max. memory is 16.1GB. [2024-11-09 05:53:05,711 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 123.7MB. Free memory is still 68.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 05:53:05,711 INFO L158 Benchmark]: CACSL2BoogieTranslator took 471.23ms. Allocated memory is still 180.4MB. Free memory was 144.4MB in the beginning and 129.7MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-11-09 05:53:05,712 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.55ms. Allocated memory is still 180.4MB. Free memory was 129.7MB in the beginning and 127.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-09 05:53:05,712 INFO L158 Benchmark]: Boogie Preprocessor took 60.11ms. Allocated memory is still 180.4MB. Free memory was 127.6MB in the beginning and 125.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-09 05:53:05,712 INFO L158 Benchmark]: RCFGBuilder took 930.53ms. Allocated memory is still 180.4MB. Free memory was 125.9MB in the beginning and 86.4MB in the end (delta: 39.5MB). Peak memory consumption was 39.8MB. Max. memory is 16.1GB. [2024-11-09 05:53:05,713 INFO L158 Benchmark]: TraceAbstraction took 29083.22ms. Allocated memory was 180.4MB in the beginning and 377.5MB in the end (delta: 197.1MB). Free memory was 85.7MB in the beginning and 125.3MB in the end (delta: -39.6MB). Peak memory consumption was 159.0MB. Max. memory is 16.1GB. [2024-11-09 05:53:05,713 INFO L158 Benchmark]: Witness Printer took 7.57ms. Allocated memory is still 377.5MB. Free memory was 125.3MB in the beginning and 124.2MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-09 05:53:05,716 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 123.7MB. Free memory is still 68.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 471.23ms. Allocated memory is still 180.4MB. Free memory was 144.4MB in the beginning and 129.7MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 47.55ms. Allocated memory is still 180.4MB. Free memory was 129.7MB in the beginning and 127.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 60.11ms. Allocated memory is still 180.4MB. Free memory was 127.6MB in the beginning and 125.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 930.53ms. Allocated memory is still 180.4MB. Free memory was 125.9MB in the beginning and 86.4MB in the end (delta: 39.5MB). Peak memory consumption was 39.8MB. Max. memory is 16.1GB. * TraceAbstraction took 29083.22ms. Allocated memory was 180.4MB in the beginning and 377.5MB in the end (delta: 197.1MB). Free memory was 85.7MB in the beginning and 125.3MB in the end (delta: -39.6MB). Peak memory consumption was 159.0MB. Max. memory is 16.1GB. * Witness Printer took 7.57ms. Allocated memory is still 377.5MB. Free memory was 125.3MB in the beginning and 124.2MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. 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: 18]: 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 111, overapproximation of shiftRight at line 118, overapproximation of bitwiseAnd at line 127. Possible FailurePath: [L227] unsigned int a ; [L228] unsigned int ma = __VERIFIER_nondet_uint(); [L229] signed char ea = __VERIFIER_nondet_char(); [L230] unsigned int b ; [L231] unsigned int mb = __VERIFIER_nondet_uint(); [L232] signed char eb = __VERIFIER_nondet_char(); [L233] unsigned int r_add1 ; [L234] unsigned int r_add2 ; [L235] unsigned int zero ; [L236] int tmp ; [L237] int tmp___0 ; [L238] int __retres14 ; VAL [ea=127, eb=127] [L242] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L30] COND TRUE ! m [L31] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0] [L81] return (__retres4); [L242] RET, EXPR base2flt(0, 0) VAL [ea=127, eb=127] [L242] zero = base2flt(0, 0) [L243] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=127, \old(m)=4328521728] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=127, \old(m)=4328521728, e=127, m=4328521728] [L30] COND FALSE !(! m) VAL [\old(e)=127, \old(m)=4328521728, e=127, m=4328521728] [L36] COND FALSE !(m < 1U << 24U) VAL [\old(e)=127, \old(m)=4328521728, e=127, m=4328521728] [L58] COND TRUE 1 VAL [\old(e)=127, \old(m)=4328521728, e=127, m=4328521728] [L60] COND TRUE m >= 1U << 25U VAL [\old(e)=127, \old(m)=4328521728, e=127, m=4328521728] [L65] COND TRUE e >= 127 [L66] __retres4 = 4294967295U VAL [\old(e)=127, \old(m)=4328521728, __retres4=4294967295, m=4328521728] [L81] return (__retres4); [L243] RET, EXPR base2flt(ma, ea) VAL [ea=127, eb=127, ma=4328521728] [L243] a = base2flt(ma, ea) [L244] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=127, \old(m)=33554432] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L30] COND FALSE !(! m) VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L36] COND FALSE !(m < 1U << 24U) VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L58] COND TRUE 1 VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L60] COND TRUE m >= 1U << 25U VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L65] COND TRUE e >= 127 [L66] __retres4 = 4294967295U VAL [\old(e)=127, \old(m)=33554432, __retres4=4294967295, m=33554432] [L81] return (__retres4); [L244] RET, EXPR base2flt(mb, eb) VAL [a=4294967295, ea=127, eb=127, ma=4328521728, mb=33554432] [L244] b = base2flt(mb, eb) [L245] CALL addflt(a, b) VAL [\old(a)=4294967295, \old(b)=4294967295] [L85] unsigned int res ; [L86] unsigned int ma ; [L87] unsigned int mb ; [L88] unsigned int delta ; [L89] int ea ; [L90] int eb ; [L91] unsigned int tmp ; [L92] unsigned int __retres10 ; [L95] COND FALSE !(a < b) VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, b=4294967295] [L102] COND FALSE !(! b) [L109] ma = a & ((1U << 24U) - 1U) [L110] ea = (int )(a >> 24U) - 128 [L111] EXPR ma | (1U << 24U) [L111] ma = ma | (1U << 24U) [L112] mb = b & ((1U << 24U) - 1U) [L113] eb = (int )(b >> 24U) - 128 [L114] EXPR mb | (1U << 24U) [L114] mb = mb | (1U << 24U) [L115] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=1] [L17] COND FALSE !(!(cond)) VAL [\old(cond)=1] [L115] RET __VERIFIER_assert(ea >= eb) VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, ea=127, eb=127, ma=16777217, mb=16777216] [L116] delta = ea - eb [L117] COND FALSE !(!(delta < sizeof(mb) * 8)) [L118] EXPR mb >> delta [L118] mb = mb >> delta [L120] COND FALSE !(! mb) [L126] ma = ma + mb [L127] ma & (1U << 25U) VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, ea=127, ma=33554433] [L127] COND FALSE !(ma & (1U << 25U)) [L140] CALL __VERIFIER_assert(ma < 1U << 25U) VAL [\old(cond)=0] [L17] COND TRUE !(cond) VAL [\old(cond)=0] [L18] reach_error() VAL [\old(cond)=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 28.9s, OverallIterations: 8, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 4.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 172 SdHoareTripleChecker+Valid, 2.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 134 mSDsluCounter, 2817 SdHoareTripleChecker+Invalid, 2.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2525 mSDsCounter, 49 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1840 IncrementalHoareTripleChecker+Invalid, 1889 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 49 mSolverCounterUnsat, 292 mSDtfsCounter, 1840 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 481 GetRequests, 265 SyntacticMatches, 10 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2022 ImplicationChecksByTransitivity, 13.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=91occurred in iteration=6, InterpolantAutomatonStates: 98, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 7 MinimizatonAttempts, 117 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 12.8s InterpolantComputationTime, 421 NumberOfCodeBlocks, 421 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 506 ConstructedInterpolants, 0 QuantifiedInterpolants, 2422 SizeOfPredicates, 19 NumberOfNonLiveVariables, 483 ConjunctsInSsa, 125 ConjunctsInUnsatCore, 15 InterpolantComputations, 5 PerfectInterpolantSequences, 195/221 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: 1.0s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 4, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 32, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 30, TOOLS_POST_TIME: 0.4s, TOOLS_POST_CALL_APPLICATIONS: 16, TOOLS_POST_CALL_TIME: 0.2s, TOOLS_POST_RETURN_APPLICATIONS: 10, TOOLS_POST_RETURN_TIME: 0.2s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 56, TOOLS_QUANTIFIERELIM_TIME: 0.7s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 80, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 16, DOMAIN_JOIN_TIME: 0.2s, 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: 32, DOMAIN_ISBOTTOM_TIME: 0.1s, 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: 10, CALL_SUMMARIZER_CACHE_MISSES: 2, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, 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: 307, DAG_COMPRESSION_RETAINED_NODES: 81, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2024-11-09 05:53:05,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 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/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje --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-a016563 [2024-11-09 05:53:08,344 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 05:53:08,467 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2024-11-09 05:53:08,474 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 05:53:08,475 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 05:53:08,521 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 05:53:08,523 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 05:53:08,523 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 05:53:08,525 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 05:53:08,526 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 05:53:08,528 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 05:53:08,528 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 05:53:08,529 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 05:53:08,529 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 05:53:08,530 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 05:53:08,530 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 05:53:08,531 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 05:53:08,531 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 05:53:08,532 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 05:53:08,536 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 05:53:08,537 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 05:53:08,537 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 05:53:08,538 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 05:53:08,538 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 05:53:08,539 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 05:53:08,540 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-09 05:53:08,540 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 05:53:08,541 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-09 05:53:08,541 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 05:53:08,541 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 05:53:08,542 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 05:53:08,542 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 05:53:08,543 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 05:53:08,544 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 05:53:08,544 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 05:53:08,545 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:53:08,545 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 05:53:08,546 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 05:53:08,546 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 05:53:08,546 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2024-11-09 05:53:08,546 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-09 05:53:08,548 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 05:53:08,548 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 05:53:08,548 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2abfa4882ab8ec6bd7a33a5fbeaa8a88ba40a897019218fc162e52833c89454b [2024-11-09 05:53:08,992 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 05:53:09,033 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 05:53:09,036 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 05:53:09,038 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 05:53:09,038 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 05:53:09,040 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c Unable to find full path for "g++" [2024-11-09 05:53:11,198 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 05:53:11,507 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 05:53:11,509 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2024-11-09 05:53:11,521 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/data/5e02e8cf7/7af74d36a94a4426b34cff6075f32375/FLAG03cb92262 [2024-11-09 05:53:11,782 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/data/5e02e8cf7/7af74d36a94a4426b34cff6075f32375 [2024-11-09 05:53:11,785 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 05:53:11,787 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 05:53:11,789 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 05:53:11,789 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 05:53:11,794 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 05:53:11,794 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:53:11" (1/1) ... [2024-11-09 05:53:11,796 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@178dfe75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:53:11, skipping insertion in model container [2024-11-09 05:53:11,796 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:53:11" (1/1) ... [2024-11-09 05:53:11,839 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 05:53:12,129 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_761d93a1-af50-4f51-b370-564d8c51e43c/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c[755,768] [2024-11-09 05:53:12,228 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:53:12,247 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 05:53:12,264 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_761d93a1-af50-4f51-b370-564d8c51e43c/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c[755,768] [2024-11-09 05:53:12,323 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:53:12,354 INFO L204 MainTranslator]: Completed translation [2024-11-09 05:53:12,354 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:53:12 WrapperNode [2024-11-09 05:53:12,355 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 05:53:12,357 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 05:53:12,357 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 05:53:12,358 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 05:53:12,368 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:53:12" (1/1) ... [2024-11-09 05:53:12,388 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:53:12" (1/1) ... [2024-11-09 05:53:12,422 INFO L138 Inliner]: procedures = 17, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2024-11-09 05:53:12,424 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 05:53:12,426 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 05:53:12,426 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 05:53:12,426 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 05:53:12,436 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:53:12" (1/1) ... [2024-11-09 05:53:12,437 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:53:12" (1/1) ... [2024-11-09 05:53:12,441 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:53:12" (1/1) ... [2024-11-09 05:53:12,443 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:53:12" (1/1) ... [2024-11-09 05:53:12,456 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:53:12" (1/1) ... [2024-11-09 05:53:12,468 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:53:12" (1/1) ... [2024-11-09 05:53:12,473 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:53:12" (1/1) ... [2024-11-09 05:53:12,475 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:53:12" (1/1) ... [2024-11-09 05:53:12,482 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 05:53:12,487 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 05:53:12,487 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 05:53:12,487 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 05:53:12,488 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:53:12" (1/1) ... [2024-11-09 05:53:12,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:53:12,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:53:12,542 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 05:53:12,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 05:53:12,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 05:53:12,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2024-11-09 05:53:12,619 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-11-09 05:53:12,620 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-11-09 05:53:12,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 05:53:12,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 05:53:12,621 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2024-11-09 05:53:12,621 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2024-11-09 05:53:12,621 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-09 05:53:12,621 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-09 05:53:12,778 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 05:53:12,783 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 05:53:13,167 INFO L? ?]: Removed 34 outVars from TransFormulas that were not future-live. [2024-11-09 05:53:13,168 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 05:53:13,186 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 05:53:13,186 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-09 05:53:13,187 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:53:13 BoogieIcfgContainer [2024-11-09 05:53:13,187 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 05:53:13,190 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 05:53:13,191 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 05:53:13,195 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 05:53:13,195 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 05:53:11" (1/3) ... [2024-11-09 05:53:13,196 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b50910e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:53:13, skipping insertion in model container [2024-11-09 05:53:13,196 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:53:12" (2/3) ... [2024-11-09 05:53:13,197 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b50910e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:53:13, skipping insertion in model container [2024-11-09 05:53:13,197 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:53:13" (3/3) ... [2024-11-09 05:53:13,199 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_4-2a.c.cil.c [2024-11-09 05:53:13,220 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 05:53:13,221 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 05:53:13,300 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 05:53:13,310 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;@6e526d81, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 05:53:13,312 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 05:53:13,317 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 42 states have internal predecessors, (61), 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) [2024-11-09 05:53:13,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-09 05:53:13,334 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:53:13,334 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:53:13,335 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:53:13,342 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:53:13,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1559176103, now seen corresponding path program 1 times [2024-11-09 05:53:13,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:53:13,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1145257103] [2024-11-09 05:53:13,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:53:13,361 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 [2024-11-09 05:53:13,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:53:13,365 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:53:13,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 [2024-11-09 05:53:13,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:53:13,526 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 05:53:13,537 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:13,705 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 05:53:13,705 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:53:13,710 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:53:13,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1145257103] [2024-11-09 05:53:13,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1145257103] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:53:13,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:53:13,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-09 05:53:13,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622551868] [2024-11-09 05:53:13,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:53:13,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 05:53:13,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:53:13,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 05:53:13,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-09 05:53:13,766 INFO L87 Difference]: Start difference. First operand has 54 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 42 states have internal predecessors, (61), 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 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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) [2024-11-09 05:53:13,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:53:13,928 INFO L93 Difference]: Finished difference Result 125 states and 189 transitions. [2024-11-09 05:53:13,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 05:53:13,931 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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 31 [2024-11-09 05:53:13,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:53:13,944 INFO L225 Difference]: With dead ends: 125 [2024-11-09 05:53:13,944 INFO L226 Difference]: Without dead ends: 68 [2024-11-09 05:53:13,949 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-09 05:53:13,956 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 13 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:53:13,958 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 445 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:53:13,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-09 05:53:14,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2024-11-09 05:53:14,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 48 states have internal predecessors, (60), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-09 05:53:14,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2024-11-09 05:53:14,025 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 31 [2024-11-09 05:53:14,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:53:14,026 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2024-11-09 05:53:14,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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) [2024-11-09 05:53:14,026 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2024-11-09 05:53:14,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-09 05:53:14,029 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:53:14,029 INFO L215 NwaCegarLoop]: trace histogram [3, 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, 1, 1] [2024-11-09 05:53:14,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 [2024-11-09 05:53:14,230 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 [2024-11-09 05:53:14,230 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:53:14,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:53:14,231 INFO L85 PathProgramCache]: Analyzing trace with hash 2128908713, now seen corresponding path program 1 times [2024-11-09 05:53:14,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:53:14,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [806698376] [2024-11-09 05:53:14,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:53:14,233 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 [2024-11-09 05:53:14,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:53:14,236 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:53:14,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 [2024-11-09 05:53:14,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:53:14,330 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-09 05:53:14,337 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:14,604 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 05:53:14,604 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:53:14,934 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 05:53:14,934 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:53:14,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [806698376] [2024-11-09 05:53:14,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [806698376] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:53:14,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [970899846] [2024-11-09 05:53:14,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:53:14,936 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 05:53:14,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 05:53:14,953 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 05:53:14,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2024-11-09 05:53:15,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:53:15,091 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-09 05:53:15,094 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:15,205 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 05:53:15,208 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:53:15,323 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 05:53:15,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [970899846] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:53:15,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156090896] [2024-11-09 05:53:15,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:53:15,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:53:15,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:53:15,328 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:53:15,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 05:53:15,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:53:15,420 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-09 05:53:15,423 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:15,499 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 05:53:15,500 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:53:15,600 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 05:53:15,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156090896] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:53:15,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 05:53:15,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 20 [2024-11-09 05:53:15,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302206163] [2024-11-09 05:53:15,604 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 05:53:15,606 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 05:53:15,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:53:15,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 05:53:15,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2024-11-09 05:53:15,611 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand has 20 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 6 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-09 05:53:15,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:53:15,907 INFO L93 Difference]: Finished difference Result 129 states and 177 transitions. [2024-11-09 05:53:15,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 05:53:15,908 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 6 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 35 [2024-11-09 05:53:15,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:53:15,911 INFO L225 Difference]: With dead ends: 129 [2024-11-09 05:53:15,911 INFO L226 Difference]: Without dead ends: 101 [2024-11-09 05:53:15,912 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 183 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2024-11-09 05:53:15,914 INFO L432 NwaCegarLoop]: 98 mSDtfsCounter, 39 mSDsluCounter, 1021 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 1119 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:53:15,914 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 1119 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:53:15,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-11-09 05:53:15,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 83. [2024-11-09 05:53:15,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 62 states have (on average 1.2903225806451613) internal successors, (80), 65 states have internal predecessors, (80), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) [2024-11-09 05:53:15,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 113 transitions. [2024-11-09 05:53:15,942 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 113 transitions. Word has length 35 [2024-11-09 05:53:15,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:53:15,943 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 113 transitions. [2024-11-09 05:53:15,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 6 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-09 05:53:15,944 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 113 transitions. [2024-11-09 05:53:15,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-09 05:53:15,948 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:53:15,949 INFO L215 NwaCegarLoop]: trace histogram [3, 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, 1, 1] [2024-11-09 05:53:15,953 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2024-11-09 05:53:16,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 [2024-11-09 05:53:16,363 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 05:53:16,550 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:53:16,551 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:53:16,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:53:16,552 INFO L85 PathProgramCache]: Analyzing trace with hash 2071650411, now seen corresponding path program 1 times [2024-11-09 05:53:16,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:53:16,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [779577644] [2024-11-09 05:53:16,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:53:16,556 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 [2024-11-09 05:53:16,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:53:16,560 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:53:16,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 [2024-11-09 05:53:16,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:53:16,636 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 05:53:16,642 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:16,751 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 05:53:16,752 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:53:16,816 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 05:53:16,817 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:53:16,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [779577644] [2024-11-09 05:53:16,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [779577644] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:53:16,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1962446967] [2024-11-09 05:53:16,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:53:16,818 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 05:53:16,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 05:53:16,821 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 05:53:16,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2024-11-09 05:53:16,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:53:16,925 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 05:53:16,931 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:16,978 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 05:53:16,978 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:53:17,043 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 05:53:17,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1962446967] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:53:17,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079254098] [2024-11-09 05:53:17,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:53:17,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:53:17,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:53:17,047 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:53:17,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 05:53:17,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:53:17,119 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 05:53:17,121 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:17,173 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 05:53:17,174 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:53:17,228 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 05:53:17,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079254098] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:53:17,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 05:53:17,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 9 [2024-11-09 05:53:17,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632976195] [2024-11-09 05:53:17,229 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 05:53:17,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 05:53:17,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:53:17,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 05:53:17,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-09 05:53:17,235 INFO L87 Difference]: Start difference. First operand 83 states and 113 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 3 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) [2024-11-09 05:53:17,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:53:17,385 INFO L93 Difference]: Finished difference Result 138 states and 183 transitions. [2024-11-09 05:53:17,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 05:53:17,387 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 3 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 35 [2024-11-09 05:53:17,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:53:17,392 INFO L225 Difference]: With dead ends: 138 [2024-11-09 05:53:17,392 INFO L226 Difference]: Without dead ends: 98 [2024-11-09 05:53:17,393 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-09 05:53:17,394 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 15 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:53:17,399 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 477 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:53:17,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-09 05:53:17,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 82. [2024-11-09 05:53:17,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 64 states have internal predecessors, (76), 12 states have call successors, (12), 6 states have call predecessors, (12), 8 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2024-11-09 05:53:17,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 107 transitions. [2024-11-09 05:53:17,426 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 107 transitions. Word has length 35 [2024-11-09 05:53:17,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:53:17,427 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 107 transitions. [2024-11-09 05:53:17,427 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 3 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) [2024-11-09 05:53:17,427 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 107 transitions. [2024-11-09 05:53:17,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-09 05:53:17,431 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:53:17,431 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 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] [2024-11-09 05:53:17,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2024-11-09 05:53:17,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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)] Forceful destruction successful, exit code 0 [2024-11-09 05:53:17,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-09 05:53:18,032 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:53:18,033 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:53:18,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:53:18,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1843904016, now seen corresponding path program 1 times [2024-11-09 05:53:18,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:53:18,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1305565974] [2024-11-09 05:53:18,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:53:18,034 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 [2024-11-09 05:53:18,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:53:18,038 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:53:18,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (9)] Waiting until timeout for monitored process [2024-11-09 05:53:18,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:53:18,104 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 05:53:18,106 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:18,188 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 05:53:18,188 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:53:18,249 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 05:53:18,249 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:53:18,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1305565974] [2024-11-09 05:53:18,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1305565974] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:53:18,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [113002559] [2024-11-09 05:53:18,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:53:18,250 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 05:53:18,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 05:53:18,254 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 05:53:18,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2024-11-09 05:53:18,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:53:18,353 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 05:53:18,355 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:18,397 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 05:53:18,397 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:53:18,464 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 05:53:18,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [113002559] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:53:18,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099870806] [2024-11-09 05:53:18,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:53:18,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:53:18,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:53:18,468 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:53:18,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 05:53:18,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:53:18,563 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 05:53:18,565 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:18,605 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 05:53:18,605 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:53:18,670 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 05:53:18,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099870806] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:53:18,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 05:53:18,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 8 [2024-11-09 05:53:18,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103904027] [2024-11-09 05:53:18,675 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 05:53:18,676 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 05:53:18,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:53:18,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 05:53:18,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-09 05:53:18,680 INFO L87 Difference]: Start difference. First operand 82 states and 107 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 05:53:18,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:53:18,784 INFO L93 Difference]: Finished difference Result 121 states and 158 transitions. [2024-11-09 05:53:18,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 05:53:18,785 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2024-11-09 05:53:18,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:53:18,787 INFO L225 Difference]: With dead ends: 121 [2024-11-09 05:53:18,790 INFO L226 Difference]: Without dead ends: 97 [2024-11-09 05:53:18,790 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-09 05:53:18,792 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 11 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:53:18,795 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 446 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:53:18,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-11-09 05:53:18,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 92. [2024-11-09 05:53:18,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 71 states have internal predecessors, (83), 14 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (21), 13 states have call predecessors, (21), 13 states have call successors, (21) [2024-11-09 05:53:18,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 118 transitions. [2024-11-09 05:53:18,817 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 118 transitions. Word has length 39 [2024-11-09 05:53:18,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:53:18,818 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 118 transitions. [2024-11-09 05:53:18,818 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 05:53:18,819 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 118 transitions. [2024-11-09 05:53:18,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-09 05:53:18,820 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:53:18,821 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:53:18,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2024-11-09 05:53:19,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-09 05:53:19,224 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (9)] Ended with exit code 0 [2024-11-09 05:53:19,422 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 [2024-11-09 05:53:19,422 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:53:19,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:53:19,423 INFO L85 PathProgramCache]: Analyzing trace with hash -2043364519, now seen corresponding path program 2 times [2024-11-09 05:53:19,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:53:19,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1455734058] [2024-11-09 05:53:19,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 05:53:19,423 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 [2024-11-09 05:53:19,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:53:19,425 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:53:19,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 [2024-11-09 05:53:19,469 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-09 05:53:19,470 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:53:19,475 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 05:53:19,477 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:19,722 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-09 05:53:19,722 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:53:19,722 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:53:19,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1455734058] [2024-11-09 05:53:19,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1455734058] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:53:19,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:53:19,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-09 05:53:19,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140575921] [2024-11-09 05:53:19,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:53:19,724 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 05:53:19,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:53:19,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 05:53:19,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2024-11-09 05:53:19,725 INFO L87 Difference]: Start difference. First operand 92 states and 118 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 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) [2024-11-09 05:53:19,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:53:19,989 INFO L93 Difference]: Finished difference Result 153 states and 201 transitions. [2024-11-09 05:53:19,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 05:53:19,990 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 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 39 [2024-11-09 05:53:19,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:53:19,992 INFO L225 Difference]: With dead ends: 153 [2024-11-09 05:53:19,992 INFO L226 Difference]: Without dead ends: 125 [2024-11-09 05:53:19,993 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2024-11-09 05:53:19,994 INFO L432 NwaCegarLoop]: 82 mSDtfsCounter, 29 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:53:19,995 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 780 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:53:19,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-11-09 05:53:20,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 115. [2024-11-09 05:53:20,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 85 states have (on average 1.2352941176470589) internal successors, (105), 89 states have internal predecessors, (105), 18 states have call successors, (18), 9 states have call predecessors, (18), 11 states have return successors, (25), 16 states have call predecessors, (25), 17 states have call successors, (25) [2024-11-09 05:53:20,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 148 transitions. [2024-11-09 05:53:20,014 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 148 transitions. Word has length 39 [2024-11-09 05:53:20,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:53:20,016 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 148 transitions. [2024-11-09 05:53:20,016 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 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) [2024-11-09 05:53:20,016 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 148 transitions. [2024-11-09 05:53:20,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-09 05:53:20,020 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:53:20,020 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:53:20,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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)] Forceful destruction successful, exit code 0 [2024-11-09 05:53:20,222 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 [2024-11-09 05:53:20,223 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:53:20,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:53:20,223 INFO L85 PathProgramCache]: Analyzing trace with hash -2100622821, now seen corresponding path program 2 times [2024-11-09 05:53:20,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:53:20,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [316260337] [2024-11-09 05:53:20,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 05:53:20,224 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 [2024-11-09 05:53:20,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:53:20,227 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:53:20,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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)] Waiting until timeout for monitored process [2024-11-09 05:53:20,291 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-09 05:53:20,291 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:53:20,292 INFO L255 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 05:53:20,294 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:20,463 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-09 05:53:20,463 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:53:20,464 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:53:20,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [316260337] [2024-11-09 05:53:20,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [316260337] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:53:20,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:53:20,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-09 05:53:20,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275255524] [2024-11-09 05:53:20,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:53:20,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 05:53:20,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:53:20,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 05:53:20,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2024-11-09 05:53:20,466 INFO L87 Difference]: Start difference. First operand 115 states and 148 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 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) [2024-11-09 05:53:20,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:53:20,789 INFO L93 Difference]: Finished difference Result 133 states and 169 transitions. [2024-11-09 05:53:20,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 05:53:20,790 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 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 39 [2024-11-09 05:53:20,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:53:20,792 INFO L225 Difference]: With dead ends: 133 [2024-11-09 05:53:20,792 INFO L226 Difference]: Without dead ends: 131 [2024-11-09 05:53:20,792 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2024-11-09 05:53:20,793 INFO L432 NwaCegarLoop]: 82 mSDtfsCounter, 42 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 859 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:53:20,794 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 859 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:53:20,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-11-09 05:53:20,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 114. [2024-11-09 05:53:20,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 85 states have (on average 1.2352941176470589) internal successors, (105), 88 states have internal predecessors, (105), 17 states have call successors, (17), 9 states have call predecessors, (17), 11 states have return successors, (24), 16 states have call predecessors, (24), 16 states have call successors, (24) [2024-11-09 05:53:20,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 146 transitions. [2024-11-09 05:53:20,820 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 146 transitions. Word has length 39 [2024-11-09 05:53:20,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:53:20,821 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 146 transitions. [2024-11-09 05:53:20,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 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) [2024-11-09 05:53:20,821 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 146 transitions. [2024-11-09 05:53:20,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-09 05:53:20,823 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:53:20,823 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, 1, 1, 1, 1] [2024-11-09 05:53:20,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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)] Ended with exit code 0 [2024-11-09 05:53:21,025 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 [2024-11-09 05:53:21,025 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:53:21,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:53:21,026 INFO L85 PathProgramCache]: Analyzing trace with hash -519932515, now seen corresponding path program 1 times [2024-11-09 05:53:21,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:53:21,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1526419128] [2024-11-09 05:53:21,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:53:21,027 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 [2024-11-09 05:53:21,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:53:21,028 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:53:21,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (14)] Waiting until timeout for monitored process [2024-11-09 05:53:21,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:53:21,076 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 05:53:21,077 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:21,243 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 05:53:21,243 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:53:21,591 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:53:21,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1526419128] [2024-11-09 05:53:21,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1526419128] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:53:21,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1178742285] [2024-11-09 05:53:21,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:53:21,592 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 05:53:21,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 05:53:21,595 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 05:53:21,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2024-11-09 05:53:21,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:53:21,723 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 05:53:21,726 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:21,814 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 05:53:21,814 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:53:21,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1178742285] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:53:21,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084564359] [2024-11-09 05:53:21,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:53:21,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:53:21,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:53:21,873 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:53:21,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 05:53:21,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:53:21,946 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 05:53:21,948 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:22,029 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 05:53:22,030 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:53:22,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084564359] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:53:22,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:53:22,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 11 [2024-11-09 05:53:22,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329112972] [2024-11-09 05:53:22,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:53:22,076 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 05:53:22,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:53:22,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 05:53:22,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2024-11-09 05:53:22,077 INFO L87 Difference]: Start difference. First operand 114 states and 146 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 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) [2024-11-09 05:53:22,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:53:22,376 INFO L93 Difference]: Finished difference Result 224 states and 288 transitions. [2024-11-09 05:53:22,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 05:53:22,377 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 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 39 [2024-11-09 05:53:22,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:53:22,380 INFO L225 Difference]: With dead ends: 224 [2024-11-09 05:53:22,381 INFO L226 Difference]: Without dead ends: 179 [2024-11-09 05:53:22,382 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2024-11-09 05:53:22,384 INFO L432 NwaCegarLoop]: 100 mSDtfsCounter, 38 mSDsluCounter, 826 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:53:22,384 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 926 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:53:22,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2024-11-09 05:53:22,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 166. [2024-11-09 05:53:22,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 124 states have (on average 1.217741935483871) internal successors, (151), 127 states have internal predecessors, (151), 25 states have call successors, (25), 14 states have call predecessors, (25), 16 states have return successors, (34), 24 states have call predecessors, (34), 24 states have call successors, (34) [2024-11-09 05:53:22,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 210 transitions. [2024-11-09 05:53:22,422 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 210 transitions. Word has length 39 [2024-11-09 05:53:22,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:53:22,423 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 210 transitions. [2024-11-09 05:53:22,423 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 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) [2024-11-09 05:53:22,423 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 210 transitions. [2024-11-09 05:53:22,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-09 05:53:22,426 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:53:22,426 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:53:22,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2024-11-09 05:53:22,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (14)] Forceful destruction successful, exit code 0 [2024-11-09 05:53:22,852 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-09 05:53:23,030 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:53:23,031 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:53:23,031 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:53:23,031 INFO L85 PathProgramCache]: Analyzing trace with hash -781424423, now seen corresponding path program 1 times [2024-11-09 05:53:23,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:53:23,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1563274552] [2024-11-09 05:53:23,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:53:23,032 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 [2024-11-09 05:53:23,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:53:23,035 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:53:23,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 [2024-11-09 05:53:23,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:53:23,091 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 05:53:23,094 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:23,223 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 05:53:23,224 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:53:23,224 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:53:23,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1563274552] [2024-11-09 05:53:23,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1563274552] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:53:23,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:53:23,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 05:53:23,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733291822] [2024-11-09 05:53:23,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:53:23,225 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 05:53:23,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:53:23,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 05:53:23,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:53:23,226 INFO L87 Difference]: Start difference. First operand 166 states and 210 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2024-11-09 05:53:23,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:53:23,354 INFO L93 Difference]: Finished difference Result 172 states and 215 transitions. [2024-11-09 05:53:23,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 05:53:23,355 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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 39 [2024-11-09 05:53:23,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:53:23,357 INFO L225 Difference]: With dead ends: 172 [2024-11-09 05:53:23,358 INFO L226 Difference]: Without dead ends: 170 [2024-11-09 05:53:23,361 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-09 05:53:23,362 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 3 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:53:23,363 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 304 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:53:23,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-11-09 05:53:23,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2024-11-09 05:53:23,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 127 states have (on average 1.2125984251968505) internal successors, (154), 130 states have internal predecessors, (154), 25 states have call successors, (25), 15 states have call predecessors, (25), 17 states have return successors, (34), 24 states have call predecessors, (34), 24 states have call successors, (34) [2024-11-09 05:53:23,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 213 transitions. [2024-11-09 05:53:23,393 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 213 transitions. Word has length 39 [2024-11-09 05:53:23,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:53:23,394 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 213 transitions. [2024-11-09 05:53:23,394 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2024-11-09 05:53:23,394 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 213 transitions. [2024-11-09 05:53:23,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-09 05:53:23,398 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:53:23,399 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:53:23,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 [2024-11-09 05:53:23,601 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 [2024-11-09 05:53:23,601 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:53:23,602 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:53:23,602 INFO L85 PathProgramCache]: Analyzing trace with hash -896846842, now seen corresponding path program 1 times [2024-11-09 05:53:23,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:53:23,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [530194056] [2024-11-09 05:53:23,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:53:23,602 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 [2024-11-09 05:53:23,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:53:23,604 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:53:23,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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)] Waiting until timeout for monitored process [2024-11-09 05:53:23,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:53:23,669 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 05:53:23,671 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:23,823 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 05:53:23,824 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:53:23,824 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:53:23,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [530194056] [2024-11-09 05:53:23,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [530194056] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:53:23,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:53:23,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-09 05:53:23,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243328148] [2024-11-09 05:53:23,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:53:23,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 05:53:23,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:53:23,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 05:53:23,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-09 05:53:23,826 INFO L87 Difference]: Start difference. First operand 170 states and 213 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 05:53:24,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:53:24,108 INFO L93 Difference]: Finished difference Result 230 states and 293 transitions. [2024-11-09 05:53:24,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 05:53:24,109 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2024-11-09 05:53:24,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:53:24,111 INFO L225 Difference]: With dead ends: 230 [2024-11-09 05:53:24,111 INFO L226 Difference]: Without dead ends: 223 [2024-11-09 05:53:24,112 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-11-09 05:53:24,116 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 23 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:53:24,116 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 527 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:53:24,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2024-11-09 05:53:24,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 185. [2024-11-09 05:53:24,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 138 states have (on average 1.210144927536232) internal successors, (167), 141 states have internal predecessors, (167), 28 states have call successors, (28), 15 states have call predecessors, (28), 18 states have return successors, (40), 28 states have call predecessors, (40), 27 states have call successors, (40) [2024-11-09 05:53:24,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 235 transitions. [2024-11-09 05:53:24,148 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 235 transitions. Word has length 44 [2024-11-09 05:53:24,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:53:24,148 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 235 transitions. [2024-11-09 05:53:24,148 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 05:53:24,149 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 235 transitions. [2024-11-09 05:53:24,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-09 05:53:24,151 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:53:24,151 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:53:24,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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)] Ended with exit code 0 [2024-11-09 05:53:24,352 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 [2024-11-09 05:53:24,352 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:53:24,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:53:24,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1030344812, now seen corresponding path program 1 times [2024-11-09 05:53:24,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:53:24,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [335079140] [2024-11-09 05:53:24,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:53:24,354 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 [2024-11-09 05:53:24,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:53:24,357 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:53:24,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (19)] Waiting until timeout for monitored process [2024-11-09 05:53:24,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:53:24,415 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 05:53:24,417 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:24,562 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 05:53:24,562 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:53:24,749 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 05:53:24,750 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:53:24,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [335079140] [2024-11-09 05:53:24,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [335079140] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:53:24,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [26935799] [2024-11-09 05:53:24,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:53:24,751 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 05:53:24,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 05:53:24,753 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 05:53:24,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2024-11-09 05:53:24,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:53:24,849 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 05:53:24,851 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:25,000 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 05:53:25,000 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:53:25,242 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 05:53:25,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [26935799] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:53:25,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208072314] [2024-11-09 05:53:25,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:53:25,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:53:25,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:53:25,245 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:53:25,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-09 05:53:25,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:53:25,318 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 05:53:25,319 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:25,363 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 05:53:25,363 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:53:25,485 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 05:53:25,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208072314] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:53:25,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 05:53:25,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10, 10, 11, 11] total 21 [2024-11-09 05:53:25,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683443939] [2024-11-09 05:53:25,490 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 05:53:25,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 05:53:25,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:53:25,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 05:53:25,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2024-11-09 05:53:25,492 INFO L87 Difference]: Start difference. First operand 185 states and 235 transitions. Second operand has 21 states, 19 states have (on average 2.473684210526316) internal successors, (47), 17 states have internal predecessors, (47), 6 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2024-11-09 05:53:26,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:53:26,133 INFO L93 Difference]: Finished difference Result 250 states and 322 transitions. [2024-11-09 05:53:26,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 05:53:26,133 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.473684210526316) internal successors, (47), 17 states have internal predecessors, (47), 6 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) Word has length 46 [2024-11-09 05:53:26,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:53:26,135 INFO L225 Difference]: With dead ends: 250 [2024-11-09 05:53:26,135 INFO L226 Difference]: Without dead ends: 242 [2024-11-09 05:53:26,136 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2024-11-09 05:53:26,137 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 44 mSDsluCounter, 1021 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1089 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:53:26,137 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1089 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 05:53:26,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2024-11-09 05:53:26,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 215. [2024-11-09 05:53:26,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 160 states have (on average 1.19375) internal successors, (191), 166 states have internal predecessors, (191), 31 states have call successors, (31), 15 states have call predecessors, (31), 23 states have return successors, (52), 33 states have call predecessors, (52), 30 states have call successors, (52) [2024-11-09 05:53:26,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 274 transitions. [2024-11-09 05:53:26,163 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 274 transitions. Word has length 46 [2024-11-09 05:53:26,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:53:26,163 INFO L471 AbstractCegarLoop]: Abstraction has 215 states and 274 transitions. [2024-11-09 05:53:26,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.473684210526316) internal successors, (47), 17 states have internal predecessors, (47), 6 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2024-11-09 05:53:26,164 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 274 transitions. [2024-11-09 05:53:26,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-09 05:53:26,165 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:53:26,165 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:53:26,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-09 05:53:26,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (19)] Forceful destruction successful, exit code 0 [2024-11-09 05:53:26,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2024-11-09 05:53:26,768 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt [2024-11-09 05:53:26,768 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:53:26,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:53:26,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1087603114, now seen corresponding path program 1 times [2024-11-09 05:53:26,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:53:26,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [799780985] [2024-11-09 05:53:26,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:53:26,769 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 [2024-11-09 05:53:26,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:53:26,772 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:53:26,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (22)] Waiting until timeout for monitored process [2024-11-09 05:53:26,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:53:26,828 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 05:53:26,830 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:26,864 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-09 05:53:26,864 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:53:26,864 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:53:26,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [799780985] [2024-11-09 05:53:26,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [799780985] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:53:26,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:53:26,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 05:53:26,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907027688] [2024-11-09 05:53:26,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:53:26,866 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 05:53:26,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:53:26,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 05:53:26,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:53:26,867 INFO L87 Difference]: Start difference. First operand 215 states and 274 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-09 05:53:26,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:53:26,926 INFO L93 Difference]: Finished difference Result 223 states and 281 transitions. [2024-11-09 05:53:26,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 05:53:26,927 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 46 [2024-11-09 05:53:26,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:53:26,929 INFO L225 Difference]: With dead ends: 223 [2024-11-09 05:53:26,929 INFO L226 Difference]: Without dead ends: 208 [2024-11-09 05:53:26,930 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-09 05:53:26,931 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 3 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:53:26,931 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 312 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 05:53:26,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2024-11-09 05:53:26,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 200. [2024-11-09 05:53:26,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 149 states have (on average 1.1946308724832215) internal successors, (178), 156 states have internal predecessors, (178), 28 states have call successors, (28), 14 states have call predecessors, (28), 22 states have return successors, (47), 29 states have call predecessors, (47), 27 states have call successors, (47) [2024-11-09 05:53:26,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 253 transitions. [2024-11-09 05:53:26,967 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 253 transitions. Word has length 46 [2024-11-09 05:53:26,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:53:26,967 INFO L471 AbstractCegarLoop]: Abstraction has 200 states and 253 transitions. [2024-11-09 05:53:26,968 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-09 05:53:26,968 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 253 transitions. [2024-11-09 05:53:26,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-09 05:53:26,969 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:53:26,969 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:53:26,973 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (22)] Ended with exit code 0 [2024-11-09 05:53:27,172 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 [2024-11-09 05:53:27,173 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:53:27,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:53:27,174 INFO L85 PathProgramCache]: Analyzing trace with hash -954213068, now seen corresponding path program 1 times [2024-11-09 05:53:27,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:53:27,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [873036979] [2024-11-09 05:53:27,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:53:27,174 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 [2024-11-09 05:53:27,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:53:27,178 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:53:27,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 [2024-11-09 05:53:27,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:53:27,232 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 05:53:27,233 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:27,533 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 05:53:27,533 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:53:28,087 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 05:53:28,088 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:53:28,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [873036979] [2024-11-09 05:53:28,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [873036979] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:53:28,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1243080437] [2024-11-09 05:53:28,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:53:28,089 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 05:53:28,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 05:53:28,091 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 05:53:28,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2024-11-09 05:53:28,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:53:28,184 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 05:53:28,185 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:28,303 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 05:53:28,304 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:53:28,635 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 05:53:28,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1243080437] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:53:28,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150943783] [2024-11-09 05:53:28,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:53:28,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:53:28,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:53:28,639 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:53:28,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-09 05:53:28,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:53:28,712 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 05:53:28,713 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:28,756 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 05:53:28,756 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:53:28,874 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 05:53:28,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150943783] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:53:28,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 05:53:28,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 12, 12, 12, 12] total 34 [2024-11-09 05:53:28,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516497599] [2024-11-09 05:53:28,876 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 05:53:28,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-09 05:53:28,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:53:28,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-09 05:53:28,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1022, Unknown=0, NotChecked=0, Total=1122 [2024-11-09 05:53:28,878 INFO L87 Difference]: Start difference. First operand 200 states and 253 transitions. Second operand has 34 states, 31 states have (on average 1.935483870967742) internal successors, (60), 28 states have internal predecessors, (60), 6 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (11), 8 states have call predecessors, (11), 5 states have call successors, (11) [2024-11-09 05:53:31,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:53:31,547 INFO L93 Difference]: Finished difference Result 310 states and 427 transitions. [2024-11-09 05:53:31,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-09 05:53:31,548 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 31 states have (on average 1.935483870967742) internal successors, (60), 28 states have internal predecessors, (60), 6 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (11), 8 states have call predecessors, (11), 5 states have call successors, (11) Word has length 48 [2024-11-09 05:53:31,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:53:31,554 INFO L225 Difference]: With dead ends: 310 [2024-11-09 05:53:31,555 INFO L226 Difference]: Without dead ends: 275 [2024-11-09 05:53:31,559 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=332, Invalid=3208, Unknown=0, NotChecked=0, Total=3540 [2024-11-09 05:53:31,559 INFO L432 NwaCegarLoop]: 100 mSDtfsCounter, 99 mSDsluCounter, 2225 mSDsCounter, 0 mSdLazyCounter, 1263 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 2325 SdHoareTripleChecker+Invalid, 1306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:53:31,560 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 2325 Invalid, 1306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1263 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-09 05:53:31,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2024-11-09 05:53:31,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 187. [2024-11-09 05:53:31,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 138 states have (on average 1.1956521739130435) internal successors, (165), 147 states have internal predecessors, (165), 26 states have call successors, (26), 13 states have call predecessors, (26), 22 states have return successors, (49), 26 states have call predecessors, (49), 25 states have call successors, (49) [2024-11-09 05:53:31,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 240 transitions. [2024-11-09 05:53:31,587 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 240 transitions. Word has length 48 [2024-11-09 05:53:31,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:53:31,587 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 240 transitions. [2024-11-09 05:53:31,588 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 31 states have (on average 1.935483870967742) internal successors, (60), 28 states have internal predecessors, (60), 6 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (11), 8 states have call predecessors, (11), 5 states have call successors, (11) [2024-11-09 05:53:31,588 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 240 transitions. [2024-11-09 05:53:31,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-09 05:53:31,589 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:53:31,590 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:53:31,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-09 05:53:31,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2024-11-09 05:53:31,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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)] Forceful destruction successful, exit code 0 [2024-11-09 05:53:32,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 [2024-11-09 05:53:32,191 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:53:32,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:53:32,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1995601196, now seen corresponding path program 2 times [2024-11-09 05:53:32,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:53:32,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1342159075] [2024-11-09 05:53:32,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 05:53:32,192 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 [2024-11-09 05:53:32,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:53:32,193 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:53:32,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 [2024-11-09 05:53:32,243 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 05:53:32,243 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:53:32,244 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 05:53:32,246 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:32,535 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 05:53:32,536 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:53:33,092 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 05:53:33,092 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:53:33,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1342159075] [2024-11-09 05:53:33,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1342159075] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:53:33,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1949166885] [2024-11-09 05:53:33,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 05:53:33,093 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 05:53:33,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 05:53:33,096 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 05:53:33,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2024-11-09 05:53:33,183 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 05:53:33,184 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:53:33,185 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 05:53:33,187 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:33,296 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 05:53:33,296 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:53:33,527 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 05:53:33,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1949166885] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:53:33,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811745480] [2024-11-09 05:53:33,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 05:53:33,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:53:33,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:53:33,528 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:53:33,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-09 05:53:33,583 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 05:53:33,583 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:53:33,584 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 05:53:33,585 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:33,621 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 05:53:33,621 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:53:33,715 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 05:53:33,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811745480] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:53:33,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 05:53:33,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 11, 11, 11, 11] total 33 [2024-11-09 05:53:33,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191744721] [2024-11-09 05:53:33,716 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 05:53:33,717 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-09 05:53:33,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:53:33,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-09 05:53:33,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=960, Unknown=0, NotChecked=0, Total=1056 [2024-11-09 05:53:33,719 INFO L87 Difference]: Start difference. First operand 187 states and 240 transitions. Second operand has 33 states, 31 states have (on average 1.967741935483871) internal successors, (61), 27 states have internal predecessors, (61), 6 states have call successors, (10), 2 states have call predecessors, (10), 7 states have return successors, (12), 9 states have call predecessors, (12), 5 states have call successors, (12) [2024-11-09 05:53:36,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:53:36,248 INFO L93 Difference]: Finished difference Result 293 states and 409 transitions. [2024-11-09 05:53:36,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-09 05:53:36,249 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 1.967741935483871) internal successors, (61), 27 states have internal predecessors, (61), 6 states have call successors, (10), 2 states have call predecessors, (10), 7 states have return successors, (12), 9 states have call predecessors, (12), 5 states have call successors, (12) Word has length 48 [2024-11-09 05:53:36,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:53:36,251 INFO L225 Difference]: With dead ends: 293 [2024-11-09 05:53:36,252 INFO L226 Difference]: Without dead ends: 280 [2024-11-09 05:53:36,253 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=343, Invalid=3197, Unknown=0, NotChecked=0, Total=3540 [2024-11-09 05:53:36,254 INFO L432 NwaCegarLoop]: 107 mSDtfsCounter, 125 mSDsluCounter, 2141 mSDsCounter, 0 mSdLazyCounter, 1286 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 2248 SdHoareTripleChecker+Invalid, 1337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:53:36,254 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 2248 Invalid, 1337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1286 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-09 05:53:36,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2024-11-09 05:53:36,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 198. [2024-11-09 05:53:36,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 144 states have (on average 1.1875) internal successors, (171), 154 states have internal predecessors, (171), 30 states have call successors, (30), 13 states have call predecessors, (30), 23 states have return successors, (64), 30 states have call predecessors, (64), 29 states have call successors, (64) [2024-11-09 05:53:36,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 265 transitions. [2024-11-09 05:53:36,286 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 265 transitions. Word has length 48 [2024-11-09 05:53:36,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:53:36,287 INFO L471 AbstractCegarLoop]: Abstraction has 198 states and 265 transitions. [2024-11-09 05:53:36,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 1.967741935483871) internal successors, (61), 27 states have internal predecessors, (61), 6 states have call successors, (10), 2 states have call predecessors, (10), 7 states have return successors, (12), 9 states have call predecessors, (12), 5 states have call successors, (12) [2024-11-09 05:53:36,288 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 265 transitions. [2024-11-09 05:53:36,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-09 05:53:36,290 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:53:36,290 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:53:36,310 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-09 05:53:36,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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)] Forceful destruction successful, exit code 0 [2024-11-09 05:53:36,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2024-11-09 05:53:36,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt [2024-11-09 05:53:36,891 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:53:36,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:53:36,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1644715609, now seen corresponding path program 1 times [2024-11-09 05:53:36,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:53:36,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [753053007] [2024-11-09 05:53:36,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:53:36,892 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 [2024-11-09 05:53:36,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:53:36,893 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:53:36,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 [2024-11-09 05:53:36,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:53:36,944 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-09 05:53:36,946 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:37,214 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-09 05:53:37,214 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:53:37,214 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:53:37,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [753053007] [2024-11-09 05:53:37,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [753053007] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:53:37,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:53:37,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2024-11-09 05:53:37,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74267394] [2024-11-09 05:53:37,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:53:37,215 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 05:53:37,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:53:37,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 05:53:37,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2024-11-09 05:53:37,216 INFO L87 Difference]: Start difference. First operand 198 states and 265 transitions. Second operand has 14 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 05:53:37,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:53:37,566 INFO L93 Difference]: Finished difference Result 296 states and 396 transitions. [2024-11-09 05:53:37,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 05:53:37,567 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 49 [2024-11-09 05:53:37,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:53:37,569 INFO L225 Difference]: With dead ends: 296 [2024-11-09 05:53:37,569 INFO L226 Difference]: Without dead ends: 234 [2024-11-09 05:53:37,570 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2024-11-09 05:53:37,571 INFO L432 NwaCegarLoop]: 101 mSDtfsCounter, 32 mSDsluCounter, 925 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 1026 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:53:37,571 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 1026 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:53:37,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2024-11-09 05:53:37,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 215. [2024-11-09 05:53:37,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 157 states have (on average 1.1656050955414012) internal successors, (183), 167 states have internal predecessors, (183), 33 states have call successors, (33), 14 states have call predecessors, (33), 24 states have return successors, (66), 33 states have call predecessors, (66), 32 states have call successors, (66) [2024-11-09 05:53:37,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 282 transitions. [2024-11-09 05:53:37,608 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 282 transitions. Word has length 49 [2024-11-09 05:53:37,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:53:37,608 INFO L471 AbstractCegarLoop]: Abstraction has 215 states and 282 transitions. [2024-11-09 05:53:37,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 05:53:37,609 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 282 transitions. [2024-11-09 05:53:37,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-09 05:53:37,611 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:53:37,611 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:53:37,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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)] Forceful destruction successful, exit code 0 [2024-11-09 05:53:37,811 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 [2024-11-09 05:53:37,812 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:53:37,812 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:53:37,812 INFO L85 PathProgramCache]: Analyzing trace with hash 389354397, now seen corresponding path program 1 times [2024-11-09 05:53:37,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:53:37,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1567831135] [2024-11-09 05:53:37,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:53:37,813 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 [2024-11-09 05:53:37,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:53:37,814 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:53:37,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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)] Waiting until timeout for monitored process [2024-11-09 05:53:37,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:53:37,875 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 05:53:37,877 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:38,095 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 05:53:38,095 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:53:38,275 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:53:38,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1567831135] [2024-11-09 05:53:38,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1567831135] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:53:38,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1634390985] [2024-11-09 05:53:38,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:53:38,276 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 05:53:38,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 05:53:38,281 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 05:53:38,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2024-11-09 05:53:38,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:53:38,416 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 05:53:38,417 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:38,551 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 05:53:38,551 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:53:38,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1634390985] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:53:38,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468108890] [2024-11-09 05:53:38,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:53:38,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:53:38,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:53:38,602 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:53:38,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-09 05:53:38,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:53:38,661 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 05:53:38,662 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:38,846 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 05:53:38,846 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:53:39,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468108890] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:53:39,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:53:39,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 13] total 13 [2024-11-09 05:53:39,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415877425] [2024-11-09 05:53:39,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:53:39,170 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 05:53:39,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:53:39,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 05:53:39,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2024-11-09 05:53:39,171 INFO L87 Difference]: Start difference. First operand 215 states and 282 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-09 05:53:39,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:53:39,709 INFO L93 Difference]: Finished difference Result 285 states and 367 transitions. [2024-11-09 05:53:39,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 05:53:39,710 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 49 [2024-11-09 05:53:39,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:53:39,712 INFO L225 Difference]: With dead ends: 285 [2024-11-09 05:53:39,712 INFO L226 Difference]: Without dead ends: 230 [2024-11-09 05:53:39,713 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 151 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2024-11-09 05:53:39,714 INFO L432 NwaCegarLoop]: 89 mSDtfsCounter, 38 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 973 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:53:39,714 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 973 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 05:53:39,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2024-11-09 05:53:39,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 221. [2024-11-09 05:53:39,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 162 states have (on average 1.154320987654321) internal successors, (187), 172 states have internal predecessors, (187), 33 states have call successors, (33), 15 states have call predecessors, (33), 25 states have return successors, (66), 33 states have call predecessors, (66), 32 states have call successors, (66) [2024-11-09 05:53:39,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 286 transitions. [2024-11-09 05:53:39,755 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 286 transitions. Word has length 49 [2024-11-09 05:53:39,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:53:39,756 INFO L471 AbstractCegarLoop]: Abstraction has 221 states and 286 transitions. [2024-11-09 05:53:39,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-09 05:53:39,756 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 286 transitions. [2024-11-09 05:53:39,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-09 05:53:39,757 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:53:39,758 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:53:39,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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)] Forceful destruction successful, exit code 0 [2024-11-09 05:53:39,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-09 05:53:40,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2024-11-09 05:53:40,358 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt [2024-11-09 05:53:40,359 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:53:40,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:53:40,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1636272491, now seen corresponding path program 2 times [2024-11-09 05:53:40,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:53:40,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [226185650] [2024-11-09 05:53:40,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 05:53:40,360 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 [2024-11-09 05:53:40,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:53:40,361 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:53:40,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (33)] Waiting until timeout for monitored process [2024-11-09 05:53:40,416 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 05:53:40,416 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:53:40,418 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 05:53:40,419 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:40,709 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 05:53:40,709 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:53:40,709 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:53:40,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [226185650] [2024-11-09 05:53:40,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [226185650] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:53:40,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:53:40,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-11-09 05:53:40,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133591447] [2024-11-09 05:53:40,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:53:40,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 05:53:40,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:53:40,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 05:53:40,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2024-11-09 05:53:40,712 INFO L87 Difference]: Start difference. First operand 221 states and 286 transitions. Second operand has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 05:53:41,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:53:41,060 INFO L93 Difference]: Finished difference Result 302 states and 390 transitions. [2024-11-09 05:53:41,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 05:53:41,061 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2024-11-09 05:53:41,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:53:41,063 INFO L225 Difference]: With dead ends: 302 [2024-11-09 05:53:41,063 INFO L226 Difference]: Without dead ends: 240 [2024-11-09 05:53:41,064 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2024-11-09 05:53:41,064 INFO L432 NwaCegarLoop]: 93 mSDtfsCounter, 35 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:53:41,065 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 773 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:53:41,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2024-11-09 05:53:41,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 227. [2024-11-09 05:53:41,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 167 states have (on average 1.1497005988023952) internal successors, (192), 177 states have internal predecessors, (192), 34 states have call successors, (34), 15 states have call predecessors, (34), 25 states have return successors, (67), 34 states have call predecessors, (67), 33 states have call successors, (67) [2024-11-09 05:53:41,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 293 transitions. [2024-11-09 05:53:41,096 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 293 transitions. Word has length 49 [2024-11-09 05:53:41,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:53:41,096 INFO L471 AbstractCegarLoop]: Abstraction has 227 states and 293 transitions. [2024-11-09 05:53:41,096 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 05:53:41,096 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 293 transitions. [2024-11-09 05:53:41,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-09 05:53:41,098 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:53:41,098 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:53:41,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (33)] Forceful destruction successful, exit code 0 [2024-11-09 05:53:41,298 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 [2024-11-09 05:53:41,299 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:53:41,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:53:41,300 INFO L85 PathProgramCache]: Analyzing trace with hash -615204137, now seen corresponding path program 1 times [2024-11-09 05:53:41,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:53:41,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1965567028] [2024-11-09 05:53:41,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:53:41,300 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 [2024-11-09 05:53:41,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:53:41,304 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:53:41,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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)] Waiting until timeout for monitored process [2024-11-09 05:53:41,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:53:41,363 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-09 05:53:41,364 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:41,600 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 05:53:41,600 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:53:41,600 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:53:41,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1965567028] [2024-11-09 05:53:41,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1965567028] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:53:41,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:53:41,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-09 05:53:41,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294368064] [2024-11-09 05:53:41,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:53:41,602 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 05:53:41,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:53:41,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 05:53:41,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2024-11-09 05:53:41,603 INFO L87 Difference]: Start difference. First operand 227 states and 293 transitions. Second operand has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 05:53:42,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:53:42,107 INFO L93 Difference]: Finished difference Result 294 states and 376 transitions. [2024-11-09 05:53:42,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 05:53:42,108 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2024-11-09 05:53:42,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:53:42,109 INFO L225 Difference]: With dead ends: 294 [2024-11-09 05:53:42,109 INFO L226 Difference]: Without dead ends: 239 [2024-11-09 05:53:42,110 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2024-11-09 05:53:42,111 INFO L432 NwaCegarLoop]: 92 mSDtfsCounter, 42 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:53:42,111 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 922 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 05:53:42,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2024-11-09 05:53:42,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 226. [2024-11-09 05:53:42,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 166 states have (on average 1.144578313253012) internal successors, (190), 176 states have internal predecessors, (190), 34 states have call successors, (34), 15 states have call predecessors, (34), 25 states have return successors, (67), 34 states have call predecessors, (67), 33 states have call successors, (67) [2024-11-09 05:53:42,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 291 transitions. [2024-11-09 05:53:42,139 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 291 transitions. Word has length 49 [2024-11-09 05:53:42,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:53:42,140 INFO L471 AbstractCegarLoop]: Abstraction has 226 states and 291 transitions. [2024-11-09 05:53:42,140 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 05:53:42,140 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 291 transitions. [2024-11-09 05:53:42,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-09 05:53:42,141 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:53:42,142 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:53:42,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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)] Forceful destruction successful, exit code 0 [2024-11-09 05:53:42,344 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 [2024-11-09 05:53:42,344 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:53:42,345 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:53:42,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1403333593, now seen corresponding path program 1 times [2024-11-09 05:53:42,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:53:42,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1208480834] [2024-11-09 05:53:42,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:53:42,345 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 [2024-11-09 05:53:42,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:53:42,349 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:53:42,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 [2024-11-09 05:53:42,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:53:42,403 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 05:53:42,404 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:42,584 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 05:53:42,585 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:53:42,585 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:53:42,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1208480834] [2024-11-09 05:53:42,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1208480834] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:53:42,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:53:42,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-09 05:53:42,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546800068] [2024-11-09 05:53:42,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:53:42,586 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 05:53:42,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:53:42,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 05:53:42,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-11-09 05:53:42,587 INFO L87 Difference]: Start difference. First operand 226 states and 291 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 05:53:44,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-09 05:53:44,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:53:44,782 INFO L93 Difference]: Finished difference Result 249 states and 319 transitions. [2024-11-09 05:53:44,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 05:53:44,784 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2024-11-09 05:53:44,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:53:44,786 INFO L225 Difference]: With dead ends: 249 [2024-11-09 05:53:44,786 INFO L226 Difference]: Without dead ends: 247 [2024-11-09 05:53:44,786 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-11-09 05:53:44,787 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 10 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:53:44,787 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 356 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2024-11-09 05:53:44,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2024-11-09 05:53:44,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 231. [2024-11-09 05:53:44,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 169 states have (on average 1.1420118343195267) internal successors, (193), 180 states have internal predecessors, (193), 35 states have call successors, (35), 16 states have call predecessors, (35), 26 states have return successors, (68), 34 states have call predecessors, (68), 34 states have call successors, (68) [2024-11-09 05:53:44,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 296 transitions. [2024-11-09 05:53:44,820 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 296 transitions. Word has length 49 [2024-11-09 05:53:44,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:53:44,821 INFO L471 AbstractCegarLoop]: Abstraction has 231 states and 296 transitions. [2024-11-09 05:53:44,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 05:53:44,821 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 296 transitions. [2024-11-09 05:53:44,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-09 05:53:44,822 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:53:44,823 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:53:44,825 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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)] Ended with exit code 0 [2024-11-09 05:53:45,023 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 [2024-11-09 05:53:45,023 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:53:45,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:53:45,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1593760598, now seen corresponding path program 1 times [2024-11-09 05:53:45,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:53:45,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1472172451] [2024-11-09 05:53:45,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:53:45,024 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 [2024-11-09 05:53:45,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:53:45,025 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:53:45,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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)] Waiting until timeout for monitored process [2024-11-09 05:53:45,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:53:45,078 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 05:53:45,079 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:45,259 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 05:53:45,259 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:53:45,690 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 05:53:45,690 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:53:45,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1472172451] [2024-11-09 05:53:45,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1472172451] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:53:45,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [785424779] [2024-11-09 05:53:45,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:53:45,691 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 05:53:45,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 05:53:45,692 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 05:53:45,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2024-11-09 05:53:45,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:53:45,767 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 05:53:45,768 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:45,803 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 05:53:45,803 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:53:45,915 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 05:53:45,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [785424779] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:53:45,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042669892] [2024-11-09 05:53:45,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:53:45,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:53:45,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:53:45,918 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:53:45,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-09 05:53:46,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:53:46,010 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 05:53:46,012 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:46,055 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 05:53:46,056 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:53:46,146 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 05:53:46,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042669892] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:53:46,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 05:53:46,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 24 [2024-11-09 05:53:46,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544174237] [2024-11-09 05:53:46,147 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 05:53:46,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-09 05:53:46,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:53:46,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-09 05:53:46,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2024-11-09 05:53:46,149 INFO L87 Difference]: Start difference. First operand 231 states and 296 transitions. Second operand has 24 states, 22 states have (on average 2.090909090909091) internal successors, (46), 20 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-09 05:53:47,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:53:47,304 INFO L93 Difference]: Finished difference Result 282 states and 379 transitions. [2024-11-09 05:53:47,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 05:53:47,305 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.090909090909091) internal successors, (46), 20 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 50 [2024-11-09 05:53:47,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:53:47,308 INFO L225 Difference]: With dead ends: 282 [2024-11-09 05:53:47,308 INFO L226 Difference]: Without dead ends: 251 [2024-11-09 05:53:47,309 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=132, Invalid=1200, Unknown=0, NotChecked=0, Total=1332 [2024-11-09 05:53:47,310 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 84 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 05:53:47,310 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 1027 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 05:53:47,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2024-11-09 05:53:47,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 222. [2024-11-09 05:53:47,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 162 states have (on average 1.1481481481481481) internal successors, (186), 173 states have internal predecessors, (186), 34 states have call successors, (34), 14 states have call predecessors, (34), 25 states have return successors, (68), 34 states have call predecessors, (68), 33 states have call successors, (68) [2024-11-09 05:53:47,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 288 transitions. [2024-11-09 05:53:47,345 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 288 transitions. Word has length 50 [2024-11-09 05:53:47,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:53:47,345 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 288 transitions. [2024-11-09 05:53:47,346 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.090909090909091) internal successors, (46), 20 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-09 05:53:47,346 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 288 transitions. [2024-11-09 05:53:47,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-09 05:53:47,347 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:53:47,347 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:53:47,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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)] Forceful destruction successful, exit code 0 [2024-11-09 05:53:47,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2024-11-09 05:53:47,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-11-09 05:53:47,949 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:53:47,949 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:53:47,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:53:47,950 INFO L85 PathProgramCache]: Analyzing trace with hash -784485475, now seen corresponding path program 1 times [2024-11-09 05:53:47,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:53:47,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1345923831] [2024-11-09 05:53:47,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:53:47,950 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 [2024-11-09 05:53:47,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:53:47,954 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:53:47,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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)] Waiting until timeout for monitored process [2024-11-09 05:53:48,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:53:48,009 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 05:53:48,011 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:48,096 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-09 05:53:48,096 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:53:48,236 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-09 05:53:48,237 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:53:48,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1345923831] [2024-11-09 05:53:48,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1345923831] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:53:48,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1548393838] [2024-11-09 05:53:48,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:53:48,238 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 05:53:48,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 05:53:48,241 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 05:53:48,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2024-11-09 05:53:48,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:53:48,382 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 05:53:48,384 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:48,432 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-09 05:53:48,432 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:53:48,520 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-09 05:53:48,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1548393838] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:53:48,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419126642] [2024-11-09 05:53:48,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:53:48,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:53:48,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:53:48,524 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:53:48,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-09 05:53:48,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:53:48,603 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 05:53:48,604 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:48,658 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-09 05:53:48,658 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:53:48,730 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-09 05:53:48,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419126642] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:53:48,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 05:53:48,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 15 [2024-11-09 05:53:48,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953664491] [2024-11-09 05:53:48,731 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 05:53:48,732 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 05:53:48,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:53:48,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 05:53:48,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2024-11-09 05:53:48,733 INFO L87 Difference]: Start difference. First operand 222 states and 288 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 11 states have internal predecessors, (40), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-09 05:53:49,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:53:49,008 INFO L93 Difference]: Finished difference Result 300 states and 377 transitions. [2024-11-09 05:53:49,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 05:53:49,009 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 11 states have internal predecessors, (40), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 50 [2024-11-09 05:53:49,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:53:49,011 INFO L225 Difference]: With dead ends: 300 [2024-11-09 05:53:49,012 INFO L226 Difference]: Without dead ends: 218 [2024-11-09 05:53:49,012 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2024-11-09 05:53:49,015 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 30 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 885 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:53:49,016 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 885 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:53:49,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2024-11-09 05:53:49,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 210. [2024-11-09 05:53:49,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 155 states have (on average 1.1419354838709677) internal successors, (177), 164 states have internal predecessors, (177), 31 states have call successors, (31), 14 states have call predecessors, (31), 23 states have return successors, (63), 31 states have call predecessors, (63), 30 states have call successors, (63) [2024-11-09 05:53:49,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 271 transitions. [2024-11-09 05:53:49,058 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 271 transitions. Word has length 50 [2024-11-09 05:53:49,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:53:49,059 INFO L471 AbstractCegarLoop]: Abstraction has 210 states and 271 transitions. [2024-11-09 05:53:49,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 11 states have internal predecessors, (40), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-09 05:53:49,059 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 271 transitions. [2024-11-09 05:53:49,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-09 05:53:49,060 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:53:49,060 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:53:49,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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)] Forceful destruction successful, exit code 0 [2024-11-09 05:53:49,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2024-11-09 05:53:49,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-11-09 05:53:49,661 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:53:49,661 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:53:49,662 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:53:49,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1237017858, now seen corresponding path program 2 times [2024-11-09 05:53:49,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:53:49,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1579369968] [2024-11-09 05:53:49,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 05:53:49,663 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 [2024-11-09 05:53:49,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:53:49,666 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:53:49,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 [2024-11-09 05:53:49,727 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 05:53:49,728 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:53:49,729 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 05:53:49,730 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:49,895 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 05:53:49,895 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:53:50,380 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 05:53:50,381 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:53:50,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1579369968] [2024-11-09 05:53:50,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1579369968] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:53:50,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1168637654] [2024-11-09 05:53:50,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 05:53:50,381 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 05:53:50,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 05:53:50,382 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 05:53:50,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2024-11-09 05:53:50,465 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 05:53:50,465 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:53:50,466 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 05:53:50,467 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:50,497 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 05:53:50,497 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:53:50,585 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 05:53:50,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1168637654] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:53:50,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830996404] [2024-11-09 05:53:50,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 05:53:50,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:53:50,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:53:50,588 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:53:50,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-09 05:53:50,665 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 05:53:50,665 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:53:50,666 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 05:53:50,667 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:50,707 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 05:53:50,707 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:53:50,810 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 05:53:50,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830996404] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:53:50,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 05:53:50,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 24 [2024-11-09 05:53:50,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685554090] [2024-11-09 05:53:50,811 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 05:53:50,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-09 05:53:50,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:53:50,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-09 05:53:50,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2024-11-09 05:53:50,813 INFO L87 Difference]: Start difference. First operand 210 states and 271 transitions. Second operand has 24 states, 22 states have (on average 2.090909090909091) internal successors, (46), 20 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-09 05:53:52,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:53:52,050 INFO L93 Difference]: Finished difference Result 257 states and 340 transitions. [2024-11-09 05:53:52,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-09 05:53:52,051 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.090909090909091) internal successors, (46), 20 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 50 [2024-11-09 05:53:52,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:53:52,052 INFO L225 Difference]: With dead ends: 257 [2024-11-09 05:53:52,052 INFO L226 Difference]: Without dead ends: 244 [2024-11-09 05:53:52,053 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=151, Invalid=1331, Unknown=0, NotChecked=0, Total=1482 [2024-11-09 05:53:52,054 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 59 mSDsluCounter, 1151 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 1220 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 05:53:52,055 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 1220 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 05:53:52,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2024-11-09 05:53:52,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 203. [2024-11-09 05:53:52,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 151 states have (on average 1.1456953642384107) internal successors, (173), 159 states have internal predecessors, (173), 29 states have call successors, (29), 14 states have call predecessors, (29), 22 states have return successors, (52), 29 states have call predecessors, (52), 28 states have call successors, (52) [2024-11-09 05:53:52,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 254 transitions. [2024-11-09 05:53:52,089 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 254 transitions. Word has length 50 [2024-11-09 05:53:52,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:53:52,089 INFO L471 AbstractCegarLoop]: Abstraction has 203 states and 254 transitions. [2024-11-09 05:53:52,090 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.090909090909091) internal successors, (46), 20 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-09 05:53:52,090 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 254 transitions. [2024-11-09 05:53:52,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-09 05:53:52,091 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:53:52,091 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:53:52,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (43)] Ended with exit code 0 [2024-11-09 05:53:52,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-11-09 05:53:52,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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)] Forceful destruction successful, exit code 0 [2024-11-09 05:53:52,692 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 [2024-11-09 05:53:52,692 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:53:52,693 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:53:52,693 INFO L85 PathProgramCache]: Analyzing trace with hash 584098529, now seen corresponding path program 1 times [2024-11-09 05:53:52,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:53:52,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [244570882] [2024-11-09 05:53:52,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:53:52,694 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 [2024-11-09 05:53:52,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:53:52,695 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:53:52,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 [2024-11-09 05:53:52,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:53:52,767 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 05:53:52,769 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:52,930 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 05:53:52,930 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:53:52,930 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:53:52,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [244570882] [2024-11-09 05:53:52,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [244570882] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:53:52,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:53:52,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-09 05:53:52,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158158908] [2024-11-09 05:53:52,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:53:52,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 05:53:52,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:53:52,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 05:53:52,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-11-09 05:53:52,933 INFO L87 Difference]: Start difference. First operand 203 states and 254 transitions. Second operand has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 05:53:53,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:53:53,158 INFO L93 Difference]: Finished difference Result 265 states and 326 transitions. [2024-11-09 05:53:53,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 05:53:53,160 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2024-11-09 05:53:53,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:53:53,162 INFO L225 Difference]: With dead ends: 265 [2024-11-09 05:53:53,162 INFO L226 Difference]: Without dead ends: 208 [2024-11-09 05:53:53,162 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-11-09 05:53:53,163 INFO L432 NwaCegarLoop]: 90 mSDtfsCounter, 34 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:53:53,165 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 744 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:53:53,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2024-11-09 05:53:53,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 198. [2024-11-09 05:53:53,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 148 states have (on average 1.1418918918918919) internal successors, (169), 155 states have internal predecessors, (169), 28 states have call successors, (28), 14 states have call predecessors, (28), 21 states have return successors, (50), 28 states have call predecessors, (50), 27 states have call successors, (50) [2024-11-09 05:53:53,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 247 transitions. [2024-11-09 05:53:53,198 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 247 transitions. Word has length 50 [2024-11-09 05:53:53,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:53:53,198 INFO L471 AbstractCegarLoop]: Abstraction has 198 states and 247 transitions. [2024-11-09 05:53:53,199 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 05:53:53,199 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 247 transitions. [2024-11-09 05:53:53,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-09 05:53:53,200 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:53:53,200 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:53:53,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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)] Forceful destruction successful, exit code 0 [2024-11-09 05:53:53,400 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 [2024-11-09 05:53:53,401 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:53:53,401 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:53:53,401 INFO L85 PathProgramCache]: Analyzing trace with hash 322606621, now seen corresponding path program 1 times [2024-11-09 05:53:53,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:53:53,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [713667605] [2024-11-09 05:53:53,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:53:53,402 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 [2024-11-09 05:53:53,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:53:53,403 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:53:53,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (46)] Waiting until timeout for monitored process [2024-11-09 05:53:53,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:53:53,464 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 05:53:53,465 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:57,965 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 05:53:57,965 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:53:57,966 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:53:57,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [713667605] [2024-11-09 05:53:57,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [713667605] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:53:57,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:53:57,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-09 05:53:57,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2835058] [2024-11-09 05:53:57,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:53:57,967 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 05:53:57,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:53:57,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 05:53:57,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=38, Unknown=2, NotChecked=0, Total=56 [2024-11-09 05:53:57,968 INFO L87 Difference]: Start difference. First operand 198 states and 247 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 05:53:59,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-09 05:54:01,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-09 05:54:01,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:54:01,575 INFO L93 Difference]: Finished difference Result 220 states and 274 transitions. [2024-11-09 05:54:01,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 05:54:01,575 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2024-11-09 05:54:01,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:54:01,577 INFO L225 Difference]: With dead ends: 220 [2024-11-09 05:54:01,577 INFO L226 Difference]: Without dead ends: 216 [2024-11-09 05:54:01,578 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=38, Invalid=92, Unknown=2, NotChecked=0, Total=132 [2024-11-09 05:54:01,578 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 16 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:54:01,579 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 307 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 1 Unknown, 0 Unchecked, 3.4s Time] [2024-11-09 05:54:01,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2024-11-09 05:54:01,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 200. [2024-11-09 05:54:01,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 150 states have (on average 1.1333333333333333) internal successors, (170), 156 states have internal predecessors, (170), 28 states have call successors, (28), 15 states have call predecessors, (28), 21 states have return successors, (50), 28 states have call predecessors, (50), 27 states have call successors, (50) [2024-11-09 05:54:01,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 248 transitions. [2024-11-09 05:54:01,627 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 248 transitions. Word has length 50 [2024-11-09 05:54:01,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:54:01,627 INFO L471 AbstractCegarLoop]: Abstraction has 200 states and 248 transitions. [2024-11-09 05:54:01,631 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 05:54:01,631 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 248 transitions. [2024-11-09 05:54:01,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-09 05:54:01,633 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:54:01,633 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:54:01,640 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (46)] Ended with exit code 0 [2024-11-09 05:54:01,834 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 [2024-11-09 05:54:01,834 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:54:01,835 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:54:01,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1563161658, now seen corresponding path program 1 times [2024-11-09 05:54:01,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:54:01,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1735705119] [2024-11-09 05:54:01,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:54:01,837 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 [2024-11-09 05:54:01,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:54:01,840 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:54:01,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (47)] Waiting until timeout for monitored process [2024-11-09 05:54:01,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:54:01,926 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 05:54:01,928 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:54:02,141 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 05:54:02,142 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:54:02,142 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:54:02,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1735705119] [2024-11-09 05:54:02,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1735705119] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:54:02,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:54:02,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-09 05:54:02,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418961340] [2024-11-09 05:54:02,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:54:02,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 05:54:02,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:54:02,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 05:54:02,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-09 05:54:02,144 INFO L87 Difference]: Start difference. First operand 200 states and 248 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-09 05:54:02,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:54:02,504 INFO L93 Difference]: Finished difference Result 246 states and 318 transitions. [2024-11-09 05:54:02,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 05:54:02,505 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (7), 2 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 59 [2024-11-09 05:54:02,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:54:02,507 INFO L225 Difference]: With dead ends: 246 [2024-11-09 05:54:02,507 INFO L226 Difference]: Without dead ends: 239 [2024-11-09 05:54:02,508 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-09 05:54:02,509 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 24 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:54:02,509 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 455 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 05:54:02,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2024-11-09 05:54:02,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 207. [2024-11-09 05:54:02,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 155 states have (on average 1.1419354838709677) internal successors, (177), 162 states have internal predecessors, (177), 29 states have call successors, (29), 15 states have call predecessors, (29), 22 states have return successors, (58), 29 states have call predecessors, (58), 28 states have call successors, (58) [2024-11-09 05:54:02,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 264 transitions. [2024-11-09 05:54:02,569 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 264 transitions. Word has length 59 [2024-11-09 05:54:02,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:54:02,569 INFO L471 AbstractCegarLoop]: Abstraction has 207 states and 264 transitions. [2024-11-09 05:54:02,569 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-09 05:54:02,570 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 264 transitions. [2024-11-09 05:54:02,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-09 05:54:02,573 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:54:02,574 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:54:02,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (47)] Forceful destruction successful, exit code 0 [2024-11-09 05:54:02,777 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 [2024-11-09 05:54:02,777 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:54:02,778 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:54:02,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1344306940, now seen corresponding path program 1 times [2024-11-09 05:54:02,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:54:02,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [148405793] [2024-11-09 05:54:02,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:54:02,779 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 [2024-11-09 05:54:02,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:54:02,783 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:54:02,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (48)] Waiting until timeout for monitored process [2024-11-09 05:54:02,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:54:02,875 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 05:54:02,877 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:54:03,100 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 05:54:03,100 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:54:03,100 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:54:03,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [148405793] [2024-11-09 05:54:03,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [148405793] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:54:03,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:54:03,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-09 05:54:03,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191817436] [2024-11-09 05:54:03,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:54:03,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 05:54:03,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:54:03,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 05:54:03,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-09 05:54:03,102 INFO L87 Difference]: Start difference. First operand 207 states and 264 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-09 05:54:03,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:54:03,427 INFO L93 Difference]: Finished difference Result 246 states and 318 transitions. [2024-11-09 05:54:03,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 05:54:03,427 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (7), 2 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 59 [2024-11-09 05:54:03,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:54:03,429 INFO L225 Difference]: With dead ends: 246 [2024-11-09 05:54:03,429 INFO L226 Difference]: Without dead ends: 233 [2024-11-09 05:54:03,429 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-09 05:54:03,430 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 22 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:54:03,430 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 556 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 05:54:03,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2024-11-09 05:54:03,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 212. [2024-11-09 05:54:03,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 157 states have (on average 1.1401273885350318) internal successors, (179), 165 states have internal predecessors, (179), 32 states have call successors, (32), 15 states have call predecessors, (32), 22 states have return successors, (61), 31 states have call predecessors, (61), 31 states have call successors, (61) [2024-11-09 05:54:03,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 272 transitions. [2024-11-09 05:54:03,474 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 272 transitions. Word has length 59 [2024-11-09 05:54:03,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:54:03,474 INFO L471 AbstractCegarLoop]: Abstraction has 212 states and 272 transitions. [2024-11-09 05:54:03,474 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-09 05:54:03,475 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 272 transitions. [2024-11-09 05:54:03,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-09 05:54:03,477 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:54:03,477 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:54:03,485 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (48)] Ended with exit code 0 [2024-11-09 05:54:03,680 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 [2024-11-09 05:54:03,680 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:54:03,681 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:54:03,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1043567054, now seen corresponding path program 2 times [2024-11-09 05:54:03,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:54:03,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1940720923] [2024-11-09 05:54:03,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 05:54:03,682 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 [2024-11-09 05:54:03,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:54:03,683 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:54:03,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (49)] Waiting until timeout for monitored process [2024-11-09 05:54:03,768 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 05:54:03,768 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:54:03,774 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 05:54:03,776 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:54:03,938 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 05:54:03,938 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:54:04,277 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 05:54:04,277 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:54:04,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1940720923] [2024-11-09 05:54:04,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1940720923] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:54:04,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1678187539] [2024-11-09 05:54:04,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 05:54:04,278 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 05:54:04,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 05:54:04,279 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 05:54:04,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2024-11-09 05:54:04,405 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 05:54:04,405 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:54:04,406 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 05:54:04,408 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:54:04,579 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 05:54:04,579 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:54:05,048 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 05:54:05,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1678187539] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:54:05,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906936907] [2024-11-09 05:54:05,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 05:54:05,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:54:05,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:54:05,050 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:54:05,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-11-09 05:54:05,133 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 05:54:05,133 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:54:05,134 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 05:54:05,136 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:54:05,212 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 05:54:05,212 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:54:05,461 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 05:54:05,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906936907] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:54:05,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 05:54:05,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 18 [2024-11-09 05:54:05,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123611467] [2024-11-09 05:54:05,462 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 05:54:05,462 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 05:54:05,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:54:05,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 05:54:05,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2024-11-09 05:54:05,464 INFO L87 Difference]: Start difference. First operand 212 states and 272 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 7 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2024-11-09 05:54:06,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:54:06,268 INFO L93 Difference]: Finished difference Result 253 states and 330 transitions. [2024-11-09 05:54:06,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 05:54:06,269 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 7 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) Word has length 63 [2024-11-09 05:54:06,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:54:06,271 INFO L225 Difference]: With dead ends: 253 [2024-11-09 05:54:06,271 INFO L226 Difference]: Without dead ends: 213 [2024-11-09 05:54:06,272 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 354 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2024-11-09 05:54:06,273 INFO L432 NwaCegarLoop]: 74 mSDtfsCounter, 39 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:54:06,273 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 716 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 05:54:06,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2024-11-09 05:54:06,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 187. [2024-11-09 05:54:06,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 140 states have (on average 1.1357142857142857) internal successors, (159), 147 states have internal predecessors, (159), 26 states have call successors, (26), 13 states have call predecessors, (26), 20 states have return successors, (49), 26 states have call predecessors, (49), 25 states have call successors, (49) [2024-11-09 05:54:06,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 234 transitions. [2024-11-09 05:54:06,305 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 234 transitions. Word has length 63 [2024-11-09 05:54:06,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:54:06,305 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 234 transitions. [2024-11-09 05:54:06,305 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 7 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2024-11-09 05:54:06,305 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 234 transitions. [2024-11-09 05:54:06,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-09 05:54:06,307 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:54:06,307 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:54:06,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 0 [2024-11-09 05:54:06,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2024-11-09 05:54:06,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (49)] Forceful destruction successful, exit code 0 [2024-11-09 05:54:06,908 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 [2024-11-09 05:54:06,908 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:54:06,908 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:54:06,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1020934800, now seen corresponding path program 2 times [2024-11-09 05:54:06,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:54:06,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [156919991] [2024-11-09 05:54:06,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 05:54:06,909 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 [2024-11-09 05:54:06,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:54:06,910 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:54:06,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (52)] Waiting until timeout for monitored process [2024-11-09 05:54:06,985 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 05:54:06,985 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:54:06,987 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 05:54:06,989 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:54:07,158 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 05:54:07,158 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:54:07,434 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 05:54:07,434 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:54:07,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [156919991] [2024-11-09 05:54:07,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [156919991] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:54:07,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1999674009] [2024-11-09 05:54:07,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 05:54:07,435 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 05:54:07,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 05:54:07,436 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 05:54:07,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2024-11-09 05:54:07,577 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 05:54:07,577 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:54:07,578 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 05:54:07,580 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:54:07,667 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 05:54:07,667 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:54:07,850 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 05:54:07,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1999674009] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:54:07,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53286426] [2024-11-09 05:54:07,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 05:54:07,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:54:07,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:54:07,852 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:54:07,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-11-09 05:54:07,937 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 05:54:07,937 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:54:07,939 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 05:54:07,940 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:54:08,010 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 05:54:08,010 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:54:08,213 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 05:54:08,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53286426] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:54:08,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 05:54:08,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2024-11-09 05:54:08,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324024500] [2024-11-09 05:54:08,214 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 05:54:08,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 05:54:08,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:54:08,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 05:54:08,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-09 05:54:08,215 INFO L87 Difference]: Start difference. First operand 187 states and 234 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-09 05:54:08,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:54:08,720 INFO L93 Difference]: Finished difference Result 226 states and 297 transitions. [2024-11-09 05:54:08,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 05:54:08,721 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 63 [2024-11-09 05:54:08,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:54:08,723 INFO L225 Difference]: With dead ends: 226 [2024-11-09 05:54:08,723 INFO L226 Difference]: Without dead ends: 206 [2024-11-09 05:54:08,724 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2024-11-09 05:54:08,725 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 38 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:54:08,725 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 388 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 05:54:08,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2024-11-09 05:54:08,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 190. [2024-11-09 05:54:08,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 142 states have (on average 1.1267605633802817) internal successors, (160), 150 states have internal predecessors, (160), 26 states have call successors, (26), 13 states have call predecessors, (26), 21 states have return successors, (52), 26 states have call predecessors, (52), 25 states have call successors, (52) [2024-11-09 05:54:08,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 238 transitions. [2024-11-09 05:54:08,777 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 238 transitions. Word has length 63 [2024-11-09 05:54:08,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:54:08,777 INFO L471 AbstractCegarLoop]: Abstraction has 190 states and 238 transitions. [2024-11-09 05:54:08,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-09 05:54:08,778 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 238 transitions. [2024-11-09 05:54:08,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-09 05:54:08,780 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:54:08,780 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:54:08,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2024-11-09 05:54:08,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (52)] Forceful destruction successful, exit code 0 [2024-11-09 05:54:09,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (53)] Ended with exit code 0 [2024-11-09 05:54:09,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt [2024-11-09 05:54:09,382 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:54:09,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:54:09,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1497370006, now seen corresponding path program 1 times [2024-11-09 05:54:09,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:54:09,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1646302331] [2024-11-09 05:54:09,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:54:09,383 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 [2024-11-09 05:54:09,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:54:09,387 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:54:09,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (55)] Waiting until timeout for monitored process [2024-11-09 05:54:09,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:54:09,465 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 05:54:09,466 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:54:09,609 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-09 05:54:09,610 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:54:09,902 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-09 05:54:09,902 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:54:09,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1646302331] [2024-11-09 05:54:09,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1646302331] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:54:09,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [225386509] [2024-11-09 05:54:09,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:54:09,903 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 05:54:09,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 05:54:09,904 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 05:54:09,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2024-11-09 05:54:10,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:54:10,014 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 05:54:10,015 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:54:10,075 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-09 05:54:10,075 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:54:10,219 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-09 05:54:10,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [225386509] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:54:10,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566180523] [2024-11-09 05:54:10,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:54:10,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:54:10,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:54:10,221 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:54:10,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-11-09 05:54:10,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:54:10,301 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 05:54:10,303 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:54:10,369 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-09 05:54:10,369 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:54:10,518 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-09 05:54:10,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566180523] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:54:10,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 05:54:10,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 13 [2024-11-09 05:54:10,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978416356] [2024-11-09 05:54:10,519 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 05:54:10,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 05:54:10,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:54:10,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 05:54:10,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-11-09 05:54:10,521 INFO L87 Difference]: Start difference. First operand 190 states and 238 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 11 states have internal predecessors, (54), 4 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-09 05:54:10,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:54:10,746 INFO L93 Difference]: Finished difference Result 206 states and 254 transitions. [2024-11-09 05:54:10,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 05:54:10,748 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 11 states have internal predecessors, (54), 4 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 3 states have call successors, (10) Word has length 65 [2024-11-09 05:54:10,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:54:10,750 INFO L225 Difference]: With dead ends: 206 [2024-11-09 05:54:10,750 INFO L226 Difference]: Without dead ends: 197 [2024-11-09 05:54:10,751 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 373 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-11-09 05:54:10,752 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 8 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:54:10,752 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 730 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:54:10,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-11-09 05:54:10,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 190. [2024-11-09 05:54:10,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 142 states have (on average 1.1267605633802817) internal successors, (160), 150 states have internal predecessors, (160), 26 states have call successors, (26), 13 states have call predecessors, (26), 21 states have return successors, (51), 26 states have call predecessors, (51), 25 states have call successors, (51) [2024-11-09 05:54:10,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 237 transitions. [2024-11-09 05:54:10,792 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 237 transitions. Word has length 65 [2024-11-09 05:54:10,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:54:10,793 INFO L471 AbstractCegarLoop]: Abstraction has 190 states and 237 transitions. [2024-11-09 05:54:10,793 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 11 states have internal predecessors, (54), 4 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-09 05:54:10,793 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 237 transitions. [2024-11-09 05:54:10,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-09 05:54:10,795 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:54:10,795 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:54:10,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2024-11-09 05:54:10,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (55)] Forceful destruction successful, exit code 0 [2024-11-09 05:54:11,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (56)] Ended with exit code 0 [2024-11-09 05:54:11,396 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt [2024-11-09 05:54:11,396 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:54:11,397 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:54:11,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1769449376, now seen corresponding path program 1 times [2024-11-09 05:54:11,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:54:11,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1742426944] [2024-11-09 05:54:11,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:54:11,397 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 [2024-11-09 05:54:11,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:54:11,402 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:54:11,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (58)] Waiting until timeout for monitored process [2024-11-09 05:54:11,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:54:11,494 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 05:54:11,496 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:54:11,820 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-09 05:54:11,820 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:54:12,185 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-09 05:54:12,185 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:54:12,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1742426944] [2024-11-09 05:54:12,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1742426944] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 05:54:12,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:54:12,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 12 [2024-11-09 05:54:12,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005300555] [2024-11-09 05:54:12,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:54:12,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 05:54:12,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:54:12,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 05:54:12,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-11-09 05:54:12,188 INFO L87 Difference]: Start difference. First operand 190 states and 237 transitions. Second operand has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-09 05:54:12,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:54:12,479 INFO L93 Difference]: Finished difference Result 241 states and 326 transitions. [2024-11-09 05:54:12,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 05:54:12,481 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 65 [2024-11-09 05:54:12,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:54:12,483 INFO L225 Difference]: With dead ends: 241 [2024-11-09 05:54:12,483 INFO L226 Difference]: Without dead ends: 228 [2024-11-09 05:54:12,484 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-11-09 05:54:12,485 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 22 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:54:12,485 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 565 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:54:12,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2024-11-09 05:54:12,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 209. [2024-11-09 05:54:12,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 153 states have (on average 1.130718954248366) internal successors, (173), 164 states have internal predecessors, (173), 32 states have call successors, (32), 13 states have call predecessors, (32), 23 states have return successors, (73), 31 states have call predecessors, (73), 31 states have call successors, (73) [2024-11-09 05:54:12,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 278 transitions. [2024-11-09 05:54:12,528 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 278 transitions. Word has length 65 [2024-11-09 05:54:12,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:54:12,528 INFO L471 AbstractCegarLoop]: Abstraction has 209 states and 278 transitions. [2024-11-09 05:54:12,528 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-09 05:54:12,528 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 278 transitions. [2024-11-09 05:54:12,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-09 05:54:12,531 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:54:12,531 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:54:12,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (58)] Ended with exit code 0 [2024-11-09 05:54:12,733 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 [2024-11-09 05:54:12,734 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:54:12,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:54:12,734 INFO L85 PathProgramCache]: Analyzing trace with hash -674229594, now seen corresponding path program 1 times [2024-11-09 05:54:12,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:54:12,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [590302464] [2024-11-09 05:54:12,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:54:12,735 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 [2024-11-09 05:54:12,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:54:12,739 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:54:12,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (59)] Waiting until timeout for monitored process [2024-11-09 05:54:12,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:54:12,817 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 05:54:12,819 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:54:13,012 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 05:54:13,013 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:54:13,410 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 05:54:13,411 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:54:13,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [590302464] [2024-11-09 05:54:13,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [590302464] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:54:13,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1345627325] [2024-11-09 05:54:13,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:54:13,411 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 05:54:13,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 05:54:13,415 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 05:54:13,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2024-11-09 05:54:13,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:54:13,536 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 05:54:13,538 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:54:13,636 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 05:54:13,636 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:54:13,873 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 05:54:13,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1345627325] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:54:13,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202108262] [2024-11-09 05:54:13,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:54:13,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:54:13,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:54:13,876 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:54:13,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2024-11-09 05:54:13,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:54:13,973 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 05:54:13,974 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:54:14,065 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 05:54:14,066 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:54:14,302 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 05:54:14,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202108262] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:54:14,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 05:54:14,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 13 [2024-11-09 05:54:14,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917908809] [2024-11-09 05:54:14,303 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 05:54:14,303 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 05:54:14,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:54:14,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 05:54:14,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-11-09 05:54:14,304 INFO L87 Difference]: Start difference. First operand 209 states and 278 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-09 05:54:14,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:54:14,842 INFO L93 Difference]: Finished difference Result 236 states and 307 transitions. [2024-11-09 05:54:14,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 05:54:14,843 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 65 [2024-11-09 05:54:14,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:54:14,845 INFO L225 Difference]: With dead ends: 236 [2024-11-09 05:54:14,846 INFO L226 Difference]: Without dead ends: 227 [2024-11-09 05:54:14,847 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 373 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2024-11-09 05:54:14,848 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 24 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:54:14,848 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 596 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 05:54:14,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2024-11-09 05:54:14,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 209. [2024-11-09 05:54:14,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 153 states have (on average 1.130718954248366) internal successors, (173), 164 states have internal predecessors, (173), 32 states have call successors, (32), 13 states have call predecessors, (32), 23 states have return successors, (72), 31 states have call predecessors, (72), 31 states have call successors, (72) [2024-11-09 05:54:14,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 277 transitions. [2024-11-09 05:54:14,908 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 277 transitions. Word has length 65 [2024-11-09 05:54:14,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:54:14,908 INFO L471 AbstractCegarLoop]: Abstraction has 209 states and 277 transitions. [2024-11-09 05:54:14,909 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-09 05:54:14,909 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 277 transitions. [2024-11-09 05:54:14,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-09 05:54:14,911 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:54:14,911 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:54:14,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (59)] Forceful destruction successful, exit code 0 [2024-11-09 05:54:15,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2024-11-09 05:54:15,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (60)] Forceful destruction successful, exit code 0 [2024-11-09 05:54:15,512 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt [2024-11-09 05:54:15,513 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:54:15,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:54:15,513 INFO L85 PathProgramCache]: Analyzing trace with hash -87423580, now seen corresponding path program 1 times [2024-11-09 05:54:15,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:54:15,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1886298403] [2024-11-09 05:54:15,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:54:15,514 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 [2024-11-09 05:54:15,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:54:15,515 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:54:15,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (62)] Waiting until timeout for monitored process [2024-11-09 05:54:15,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:54:15,614 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 05:54:15,616 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:54:15,799 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 05:54:15,800 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:54:16,087 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 05:54:16,088 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:54:16,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1886298403] [2024-11-09 05:54:16,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1886298403] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:54:16,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1687000541] [2024-11-09 05:54:16,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:54:16,088 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 05:54:16,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 05:54:16,089 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 05:54:16,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (63)] Waiting until timeout for monitored process [2024-11-09 05:54:16,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:54:16,217 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 05:54:16,219 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:54:16,317 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 05:54:16,317 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:54:16,497 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 05:54:16,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1687000541] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:54:16,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996797665] [2024-11-09 05:54:16,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:54:16,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:54:16,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:54:16,499 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:54:16,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2024-11-09 05:54:16,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:54:16,586 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 05:54:16,588 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:54:16,663 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 05:54:16,663 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:54:16,862 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 05:54:16,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996797665] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:54:16,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 05:54:16,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2024-11-09 05:54:16,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231875239] [2024-11-09 05:54:16,863 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 05:54:16,863 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 05:54:16,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:54:16,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 05:54:16,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-09 05:54:16,864 INFO L87 Difference]: Start difference. First operand 209 states and 277 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-09 05:54:17,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:54:17,315 INFO L93 Difference]: Finished difference Result 225 states and 293 transitions. [2024-11-09 05:54:17,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 05:54:17,317 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 65 [2024-11-09 05:54:17,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:54:17,319 INFO L225 Difference]: With dead ends: 225 [2024-11-09 05:54:17,319 INFO L226 Difference]: Without dead ends: 211 [2024-11-09 05:54:17,321 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2024-11-09 05:54:17,322 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 38 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:54:17,322 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 461 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 05:54:17,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2024-11-09 05:54:17,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 206. [2024-11-09 05:54:17,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 151 states have (on average 1.1258278145695364) internal successors, (170), 161 states have internal predecessors, (170), 32 states have call successors, (32), 13 states have call predecessors, (32), 22 states have return successors, (70), 31 states have call predecessors, (70), 31 states have call successors, (70) [2024-11-09 05:54:17,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 272 transitions. [2024-11-09 05:54:17,365 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 272 transitions. Word has length 65 [2024-11-09 05:54:17,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:54:17,366 INFO L471 AbstractCegarLoop]: Abstraction has 206 states and 272 transitions. [2024-11-09 05:54:17,366 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-09 05:54:17,367 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 272 transitions. [2024-11-09 05:54:17,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-09 05:54:17,369 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:54:17,369 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:54:17,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (63)] Ended with exit code 0 [2024-11-09 05:54:17,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2024-11-09 05:54:17,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (62)] Forceful destruction successful, exit code 0 [2024-11-09 05:54:17,972 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 [2024-11-09 05:54:17,972 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:54:17,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:54:17,973 INFO L85 PathProgramCache]: Analyzing trace with hash -948989208, now seen corresponding path program 2 times [2024-11-09 05:54:17,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:54:17,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1742129857] [2024-11-09 05:54:17,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 05:54:17,973 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 [2024-11-09 05:54:17,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:54:17,975 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:54:17,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (65)] Waiting until timeout for monitored process [2024-11-09 05:54:18,055 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 05:54:18,055 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:54:18,058 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 05:54:18,060 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:54:18,233 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 05:54:18,234 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:54:18,514 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 05:54:18,515 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:54:18,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1742129857] [2024-11-09 05:54:18,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1742129857] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:54:18,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [324265339] [2024-11-09 05:54:18,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 05:54:18,516 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 05:54:18,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 05:54:18,518 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 05:54:18,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (66)] Waiting until timeout for monitored process [2024-11-09 05:54:18,658 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 05:54:18,658 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:54:18,660 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 05:54:18,661 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:54:18,734 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 05:54:18,734 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:54:18,922 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 05:54:18,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [324265339] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:54:18,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932086032] [2024-11-09 05:54:18,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 05:54:18,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:54:18,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:54:18,924 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:54:18,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2024-11-09 05:54:19,013 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 05:54:19,013 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:54:19,016 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 05:54:19,018 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:54:19,094 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 05:54:19,094 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:54:19,282 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 05:54:19,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932086032] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:54:19,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 05:54:19,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2024-11-09 05:54:19,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401151411] [2024-11-09 05:54:19,283 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 05:54:19,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 05:54:19,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:54:19,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 05:54:19,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-09 05:54:19,285 INFO L87 Difference]: Start difference. First operand 206 states and 272 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-09 05:54:19,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:54:19,677 INFO L93 Difference]: Finished difference Result 222 states and 288 transitions. [2024-11-09 05:54:19,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 05:54:19,678 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 65 [2024-11-09 05:54:19,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:54:19,680 INFO L225 Difference]: With dead ends: 222 [2024-11-09 05:54:19,680 INFO L226 Difference]: Without dead ends: 208 [2024-11-09 05:54:19,682 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-09 05:54:19,684 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 25 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:54:19,684 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 445 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:54:19,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2024-11-09 05:54:19,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 203. [2024-11-09 05:54:19,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 149 states have (on average 1.1208053691275168) internal successors, (167), 158 states have internal predecessors, (167), 32 states have call successors, (32), 13 states have call predecessors, (32), 21 states have return successors, (67), 31 states have call predecessors, (67), 31 states have call successors, (67) [2024-11-09 05:54:19,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 266 transitions. [2024-11-09 05:54:19,729 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 266 transitions. Word has length 65 [2024-11-09 05:54:19,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:54:19,732 INFO L471 AbstractCegarLoop]: Abstraction has 203 states and 266 transitions. [2024-11-09 05:54:19,732 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-09 05:54:19,732 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 266 transitions. [2024-11-09 05:54:19,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-09 05:54:19,734 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:54:19,735 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:54:19,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (65)] Forceful destruction successful, exit code 0 [2024-11-09 05:54:19,938 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (66)] Ended with exit code 0 [2024-11-09 05:54:20,151 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2024-11-09 05:54:20,336 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:54:20,336 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:54:20,336 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:54:20,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1614982799, now seen corresponding path program 1 times [2024-11-09 05:54:20,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:54:20,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1001652603] [2024-11-09 05:54:20,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:54:20,337 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 [2024-11-09 05:54:20,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:54:20,340 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:54:20,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (68)] Waiting until timeout for monitored process [2024-11-09 05:54:20,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:54:20,434 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 05:54:20,436 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:54:21,506 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 05:54:21,507 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:54:23,555 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 05:54:23,555 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:54:23,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1001652603] [2024-11-09 05:54:23,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1001652603] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:54:23,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [876408169] [2024-11-09 05:54:23,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:54:23,556 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 05:54:23,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 05:54:23,557 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 05:54:23,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (69)] Waiting until timeout for monitored process [2024-11-09 05:54:23,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:54:23,722 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 05:54:23,723 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:54:24,040 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 05:54:24,040 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:54:24,592 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 05:54:24,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [876408169] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:54:24,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230034622] [2024-11-09 05:54:24,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:54:24,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:54:24,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:54:24,595 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:54:24,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2024-11-09 05:54:24,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:54:24,696 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 05:54:24,697 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:54:24,992 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 05:54:24,992 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:54:25,535 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 05:54:25,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230034622] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:54:25,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 05:54:25,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 23 [2024-11-09 05:54:25,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309238389] [2024-11-09 05:54:25,536 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 05:54:25,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-09 05:54:25,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:54:25,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-09 05:54:25,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2024-11-09 05:54:25,537 INFO L87 Difference]: Start difference. First operand 203 states and 266 transitions. Second operand has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-09 05:54:27,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:54:27,645 INFO L93 Difference]: Finished difference Result 228 states and 291 transitions. [2024-11-09 05:54:27,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 05:54:27,646 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 72 [2024-11-09 05:54:27,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:54:27,648 INFO L225 Difference]: With dead ends: 228 [2024-11-09 05:54:27,648 INFO L226 Difference]: Without dead ends: 221 [2024-11-09 05:54:27,650 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 405 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2024-11-09 05:54:27,650 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 43 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:54:27,651 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 812 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 05:54:27,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2024-11-09 05:54:27,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 203. [2024-11-09 05:54:27,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 149 states have (on average 1.1208053691275168) internal successors, (167), 158 states have internal predecessors, (167), 32 states have call successors, (32), 13 states have call predecessors, (32), 21 states have return successors, (66), 31 states have call predecessors, (66), 31 states have call successors, (66) [2024-11-09 05:54:27,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 265 transitions. [2024-11-09 05:54:27,699 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 265 transitions. Word has length 72 [2024-11-09 05:54:27,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:54:27,700 INFO L471 AbstractCegarLoop]: Abstraction has 203 states and 265 transitions. [2024-11-09 05:54:27,700 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-09 05:54:27,700 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 265 transitions. [2024-11-09 05:54:27,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-09 05:54:27,702 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:54:27,703 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:54:27,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (69)] Ended with exit code 0 [2024-11-09 05:54:27,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (68)] Forceful destruction successful, exit code 0 [2024-11-09 05:54:28,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2024-11-09 05:54:28,304 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:54:28,304 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:54:28,304 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:54:28,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1396128081, now seen corresponding path program 1 times [2024-11-09 05:54:28,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:54:28,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1647928329] [2024-11-09 05:54:28,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:54:28,305 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 [2024-11-09 05:54:28,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:54:28,307 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:54:28,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (71)] Waiting until timeout for monitored process [2024-11-09 05:54:28,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:54:28,404 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-09 05:54:28,405 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:54:29,540 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 05:54:29,540 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:54:32,672 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 05:54:32,672 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:54:32,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1647928329] [2024-11-09 05:54:32,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1647928329] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:54:32,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1688698333] [2024-11-09 05:54:32,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:54:32,673 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 05:54:32,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 05:54:32,674 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 05:54:32,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (72)] Waiting until timeout for monitored process [2024-11-09 05:54:32,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:54:32,872 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-09 05:54:32,874 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:54:33,643 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 05:54:33,643 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:54:34,719 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 05:54:34,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1688698333] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:54:34,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987049040] [2024-11-09 05:54:34,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:54:34,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:54:34,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:54:34,721 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:54:34,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2024-11-09 05:54:34,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:54:34,821 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-09 05:54:34,823 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:54:36,895 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 05:54:36,895 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:54:42,140 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 05:54:42,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987049040] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:54:42,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 05:54:42,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16, 16, 17, 17] total 51 [2024-11-09 05:54:42,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666751218] [2024-11-09 05:54:42,141 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 05:54:42,142 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-09 05:54:42,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:54:42,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-09 05:54:42,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=2263, Unknown=0, NotChecked=0, Total=2550 [2024-11-09 05:54:42,144 INFO L87 Difference]: Start difference. First operand 203 states and 265 transitions. Second operand has 51 states, 51 states have (on average 1.803921568627451) internal successors, (92), 51 states have internal predecessors, (92), 12 states have call successors, (15), 2 states have call predecessors, (15), 6 states have return successors, (17), 12 states have call predecessors, (17), 11 states have call successors, (17) [2024-11-09 05:54:51,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:54:51,283 INFO L93 Difference]: Finished difference Result 262 states and 333 transitions. [2024-11-09 05:54:51,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-09 05:54:51,285 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.803921568627451) internal successors, (92), 51 states have internal predecessors, (92), 12 states have call successors, (15), 2 states have call predecessors, (15), 6 states have return successors, (17), 12 states have call predecessors, (17), 11 states have call successors, (17) Word has length 72 [2024-11-09 05:54:51,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:54:51,286 INFO L225 Difference]: With dead ends: 262 [2024-11-09 05:54:51,287 INFO L226 Difference]: Without dead ends: 249 [2024-11-09 05:54:51,288 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=699, Invalid=4557, Unknown=0, NotChecked=0, Total=5256 [2024-11-09 05:54:51,288 INFO L432 NwaCegarLoop]: 81 mSDtfsCounter, 73 mSDsluCounter, 1152 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 1233 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:54:51,289 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 1233 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 974 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2024-11-09 05:54:51,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2024-11-09 05:54:51,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 227. [2024-11-09 05:54:51,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 168 states have (on average 1.1369047619047619) internal successors, (191), 178 states have internal predecessors, (191), 36 states have call successors, (36), 14 states have call predecessors, (36), 22 states have return successors, (69), 34 states have call predecessors, (69), 35 states have call successors, (69) [2024-11-09 05:54:51,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 296 transitions. [2024-11-09 05:54:51,352 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 296 transitions. Word has length 72 [2024-11-09 05:54:51,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:54:51,352 INFO L471 AbstractCegarLoop]: Abstraction has 227 states and 296 transitions. [2024-11-09 05:54:51,352 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.803921568627451) internal successors, (92), 51 states have internal predecessors, (92), 12 states have call successors, (15), 2 states have call predecessors, (15), 6 states have return successors, (17), 12 states have call predecessors, (17), 11 states have call successors, (17) [2024-11-09 05:54:51,353 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 296 transitions. [2024-11-09 05:54:51,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-09 05:54:51,355 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:54:51,356 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:54:51,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (71)] Forceful destruction successful, exit code 0 [2024-11-09 05:54:51,558 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (72)] Ended with exit code 0 [2024-11-09 05:54:51,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2024-11-09 05:54:51,956 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:54:51,957 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:54:51,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:54:51,957 INFO L85 PathProgramCache]: Analyzing trace with hash -834617331, now seen corresponding path program 2 times [2024-11-09 05:54:51,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:54:51,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [628374057] [2024-11-09 05:54:51,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 05:54:51,958 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 [2024-11-09 05:54:51,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:54:51,959 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:54:51,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (74)] Waiting until timeout for monitored process [2024-11-09 05:54:52,054 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 05:54:52,054 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:54:52,057 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-09 05:54:52,060 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:54:53,254 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 05:54:53,254 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:54:56,457 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 05:54:56,457 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:54:56,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [628374057] [2024-11-09 05:54:56,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [628374057] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:54:56,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1453851108] [2024-11-09 05:54:56,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 05:54:56,458 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 05:54:56,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 05:54:56,459 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 05:54:56,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (75)] Waiting until timeout for monitored process [2024-11-09 05:54:56,662 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 05:54:56,663 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:54:56,665 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-09 05:54:56,667 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:54:57,033 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 05:54:57,033 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:54:58,321 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 05:54:58,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1453851108] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:54:58,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544118582] [2024-11-09 05:54:58,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 05:54:58,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:54:58,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:54:58,325 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:54:58,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2024-11-09 05:54:58,431 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 05:54:58,431 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:54:58,433 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-09 05:54:58,435 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:54:58,792 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 05:54:58,792 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:54:59,831 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 05:54:59,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544118582] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:54:59,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 05:54:59,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 15, 16, 15, 16] total 28 [2024-11-09 05:54:59,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572224626] [2024-11-09 05:54:59,832 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 05:54:59,832 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-09 05:54:59,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:54:59,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-09 05:54:59,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2024-11-09 05:54:59,834 INFO L87 Difference]: Start difference. First operand 227 states and 296 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-09 05:55:06,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:55:06,392 INFO L93 Difference]: Finished difference Result 301 states and 395 transitions. [2024-11-09 05:55:06,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-09 05:55:06,394 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 72 [2024-11-09 05:55:06,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:55:06,395 INFO L225 Difference]: With dead ends: 301 [2024-11-09 05:55:06,395 INFO L226 Difference]: Without dead ends: 269 [2024-11-09 05:55:06,396 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 400 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=342, Invalid=2108, Unknown=0, NotChecked=0, Total=2450 [2024-11-09 05:55:06,397 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 110 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 825 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-11-09 05:55:06,398 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 825 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-11-09 05:55:06,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2024-11-09 05:55:06,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 242. [2024-11-09 05:55:06,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 179 states have (on average 1.1396648044692737) internal successors, (204), 190 states have internal predecessors, (204), 39 states have call successors, (39), 15 states have call predecessors, (39), 23 states have return successors, (83), 36 states have call predecessors, (83), 38 states have call successors, (83) [2024-11-09 05:55:06,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 326 transitions. [2024-11-09 05:55:06,458 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 326 transitions. Word has length 72 [2024-11-09 05:55:06,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:55:06,459 INFO L471 AbstractCegarLoop]: Abstraction has 242 states and 326 transitions. [2024-11-09 05:55:06,459 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-09 05:55:06,459 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 326 transitions. [2024-11-09 05:55:06,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-09 05:55:06,461 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:55:06,461 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:55:06,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (75)] Ended with exit code 0 [2024-11-09 05:55:06,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2024-11-09 05:55:06,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (74)] Ended with exit code 0 [2024-11-09 05:55:07,062 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 [2024-11-09 05:55:07,063 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:55:07,063 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:55:07,063 INFO L85 PathProgramCache]: Analyzing trace with hash -208844389, now seen corresponding path program 1 times [2024-11-09 05:55:07,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:55:07,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [630473737] [2024-11-09 05:55:07,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:55:07,064 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 [2024-11-09 05:55:07,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:55:07,065 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:55:07,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (77)] Waiting until timeout for monitored process [2024-11-09 05:55:07,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:55:07,161 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-09 05:55:07,163 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:55:07,851 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 05:55:07,851 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:55:08,229 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:55:08,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [630473737] [2024-11-09 05:55:08,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [630473737] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:55:08,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1197942858] [2024-11-09 05:55:08,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:55:08,230 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 05:55:08,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 05:55:08,231 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 05:55:08,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (78)] Waiting until timeout for monitored process [2024-11-09 05:55:08,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:55:08,372 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 05:55:08,374 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:55:08,850 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 05:55:08,850 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:55:09,600 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 05:55:09,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1197942858] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:55:09,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339483573] [2024-11-09 05:55:09,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:55:09,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:55:09,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:55:09,602 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:55:09,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2024-11-09 05:55:09,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:55:09,713 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 05:55:09,716 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:55:09,846 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 05:55:09,846 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:55:10,216 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 05:55:10,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339483573] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:55:10,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 5 imperfect interpolant sequences. [2024-11-09 05:55:10,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12] total 21 [2024-11-09 05:55:10,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708522177] [2024-11-09 05:55:10,217 INFO L85 oduleStraightlineAll]: Using 5 imperfect interpolants to construct interpolant automaton [2024-11-09 05:55:10,217 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 05:55:10,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:55:10,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 05:55:10,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2024-11-09 05:55:10,219 INFO L87 Difference]: Start difference. First operand 242 states and 326 transitions. Second operand has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 19 states have internal predecessors, (69), 6 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (11), 8 states have call predecessors, (11), 5 states have call successors, (11) [2024-11-09 05:55:12,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:55:12,457 INFO L93 Difference]: Finished difference Result 262 states and 345 transitions. [2024-11-09 05:55:12,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 05:55:12,458 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 19 states have internal predecessors, (69), 6 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (11), 8 states have call predecessors, (11), 5 states have call successors, (11) Word has length 74 [2024-11-09 05:55:12,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:55:12,460 INFO L225 Difference]: With dead ends: 262 [2024-11-09 05:55:12,460 INFO L226 Difference]: Without dead ends: 247 [2024-11-09 05:55:12,461 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 350 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2024-11-09 05:55:12,462 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 17 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:55:12,462 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 1048 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-09 05:55:12,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2024-11-09 05:55:12,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 242. [2024-11-09 05:55:12,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 179 states have (on average 1.1340782122905029) internal successors, (203), 190 states have internal predecessors, (203), 39 states have call successors, (39), 15 states have call predecessors, (39), 23 states have return successors, (80), 36 states have call predecessors, (80), 38 states have call successors, (80) [2024-11-09 05:55:12,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 322 transitions. [2024-11-09 05:55:12,543 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 322 transitions. Word has length 74 [2024-11-09 05:55:12,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:55:12,544 INFO L471 AbstractCegarLoop]: Abstraction has 242 states and 322 transitions. [2024-11-09 05:55:12,544 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 19 states have internal predecessors, (69), 6 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (11), 8 states have call predecessors, (11), 5 states have call successors, (11) [2024-11-09 05:55:12,544 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 322 transitions. [2024-11-09 05:55:12,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-09 05:55:12,545 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:55:12,546 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:55:12,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (78)] Forceful destruction successful, exit code 0 [2024-11-09 05:55:12,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (77)] Forceful destruction successful, exit code 0 [2024-11-09 05:55:12,963 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2024-11-09 05:55:13,147 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:55:13,147 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:55:13,147 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:55:13,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1675078879, now seen corresponding path program 1 times [2024-11-09 05:55:13,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:55:13,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [392477317] [2024-11-09 05:55:13,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:55:13,148 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 [2024-11-09 05:55:13,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:55:13,152 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:55:13,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (80)] Waiting until timeout for monitored process [2024-11-09 05:55:13,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:55:13,251 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-09 05:55:13,253 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:55:14,224 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 05:55:14,224 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:55:14,600 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:55:14,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [392477317] [2024-11-09 05:55:14,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [392477317] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:55:14,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1399263233] [2024-11-09 05:55:14,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:55:14,601 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 05:55:14,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 05:55:14,602 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 05:55:14,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (81)] Waiting until timeout for monitored process [2024-11-09 05:55:14,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:55:14,787 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-09 05:55:14,789 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:55:15,057 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 05:55:15,057 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:55:15,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1399263233] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:55:15,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162866123] [2024-11-09 05:55:15,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:55:15,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:55:15,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:55:15,414 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:55:15,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2024-11-09 05:55:15,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:55:15,514 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 05:55:15,515 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:55:16,401 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 05:55:16,401 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:55:17,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162866123] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:55:17,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:55:17,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 13 [2024-11-09 05:55:17,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090237133] [2024-11-09 05:55:17,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:55:17,436 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 05:55:17,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:55:17,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 05:55:17,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-11-09 05:55:17,437 INFO L87 Difference]: Start difference. First operand 242 states and 322 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-09 05:55:19,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:55:19,411 INFO L93 Difference]: Finished difference Result 267 states and 350 transitions. [2024-11-09 05:55:19,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 05:55:19,412 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 74 [2024-11-09 05:55:19,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:55:19,414 INFO L225 Difference]: With dead ends: 267 [2024-11-09 05:55:19,414 INFO L226 Difference]: Without dead ends: 258 [2024-11-09 05:55:19,415 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 231 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2024-11-09 05:55:19,416 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 24 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:55:19,417 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 675 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 05:55:19,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2024-11-09 05:55:19,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 242. [2024-11-09 05:55:19,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 179 states have (on average 1.1340782122905029) internal successors, (203), 190 states have internal predecessors, (203), 39 states have call successors, (39), 15 states have call predecessors, (39), 23 states have return successors, (79), 36 states have call predecessors, (79), 38 states have call successors, (79) [2024-11-09 05:55:19,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 321 transitions. [2024-11-09 05:55:19,499 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 321 transitions. Word has length 74 [2024-11-09 05:55:19,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:55:19,500 INFO L471 AbstractCegarLoop]: Abstraction has 242 states and 321 transitions. [2024-11-09 05:55:19,500 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-09 05:55:19,504 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 321 transitions. [2024-11-09 05:55:19,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-09 05:55:19,506 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:55:19,506 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:55:19,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (80)] Forceful destruction successful, exit code 0 [2024-11-09 05:55:19,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (81)] Ended with exit code 0 [2024-11-09 05:55:19,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2024-11-09 05:55:20,108 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:55:20,109 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:55:20,110 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:55:20,110 INFO L85 PathProgramCache]: Analyzing trace with hash 784147540, now seen corresponding path program 1 times [2024-11-09 05:55:20,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:55:20,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1563542407] [2024-11-09 05:55:20,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:55:20,111 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 [2024-11-09 05:55:20,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:55:20,115 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:55:20,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (83)] Waiting until timeout for monitored process [2024-11-09 05:55:20,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:55:20,226 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 05:55:20,227 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:55:20,432 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 05:55:20,432 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:55:20,432 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:55:20,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1563542407] [2024-11-09 05:55:20,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1563542407] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:55:20,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:55:20,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-09 05:55:20,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938697095] [2024-11-09 05:55:20,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:55:20,435 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 05:55:20,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:55:20,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 05:55:20,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-09 05:55:20,441 INFO L87 Difference]: Start difference. First operand 242 states and 321 transitions. Second operand has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-09 05:55:20,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:55:20,679 INFO L93 Difference]: Finished difference Result 258 states and 338 transitions. [2024-11-09 05:55:20,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 05:55:20,679 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 74 [2024-11-09 05:55:20,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:55:20,681 INFO L225 Difference]: With dead ends: 258 [2024-11-09 05:55:20,681 INFO L226 Difference]: Without dead ends: 247 [2024-11-09 05:55:20,682 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-09 05:55:20,682 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 3 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:55:20,682 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 454 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:55:20,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2024-11-09 05:55:20,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 242. [2024-11-09 05:55:20,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 179 states have (on average 1.1340782122905029) internal successors, (203), 190 states have internal predecessors, (203), 39 states have call successors, (39), 15 states have call predecessors, (39), 23 states have return successors, (75), 36 states have call predecessors, (75), 38 states have call successors, (75) [2024-11-09 05:55:20,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 317 transitions. [2024-11-09 05:55:20,760 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 317 transitions. Word has length 74 [2024-11-09 05:55:20,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:55:20,761 INFO L471 AbstractCegarLoop]: Abstraction has 242 states and 317 transitions. [2024-11-09 05:55:20,761 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-09 05:55:20,761 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 317 transitions. [2024-11-09 05:55:20,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-09 05:55:20,763 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:55:20,764 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:55:20,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (83)] Forceful destruction successful, exit code 0 [2024-11-09 05:55:20,964 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 [2024-11-09 05:55:20,964 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:55:20,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:55:20,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1456224161, now seen corresponding path program 1 times [2024-11-09 05:55:20,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:55:20,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1831548081] [2024-11-09 05:55:20,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:55:20,965 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 [2024-11-09 05:55:20,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:55:20,969 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:55:20,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (84)] Waiting until timeout for monitored process [2024-11-09 05:55:21,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:55:21,092 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-09 05:55:21,095 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:55:22,443 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 05:55:22,443 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:55:26,093 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 05:55:26,093 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:55:26,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1831548081] [2024-11-09 05:55:26,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1831548081] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:55:26,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1062884810] [2024-11-09 05:55:26,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:55:26,094 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 05:55:26,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 05:55:26,097 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 05:55:26,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (85)] Waiting until timeout for monitored process [2024-11-09 05:55:26,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:55:26,354 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-09 05:55:26,357 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:55:26,699 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 05:55:26,699 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:55:27,750 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 05:55:27,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1062884810] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:55:27,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817609797] [2024-11-09 05:55:27,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:55:27,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:55:27,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:55:27,752 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:55:27,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2024-11-09 05:55:27,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:55:27,863 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-09 05:55:27,865 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:55:28,242 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 05:55:28,242 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:55:29,404 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 05:55:29,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817609797] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:55:29,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 05:55:29,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 15, 16, 15, 16] total 28 [2024-11-09 05:55:29,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816140330] [2024-11-09 05:55:29,405 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 05:55:29,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-09 05:55:29,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:55:29,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-09 05:55:29,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2024-11-09 05:55:29,407 INFO L87 Difference]: Start difference. First operand 242 states and 317 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-09 05:55:33,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:55:33,378 INFO L93 Difference]: Finished difference Result 285 states and 365 transitions. [2024-11-09 05:55:33,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-09 05:55:33,380 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 74 [2024-11-09 05:55:33,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:55:33,381 INFO L225 Difference]: With dead ends: 285 [2024-11-09 05:55:33,382 INFO L226 Difference]: Without dead ends: 271 [2024-11-09 05:55:33,382 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 412 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2024-11-09 05:55:33,383 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 28 mSDsluCounter, 973 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1038 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-09 05:55:33,383 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 1038 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-11-09 05:55:33,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2024-11-09 05:55:33,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 255. [2024-11-09 05:55:33,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 190 states have (on average 1.131578947368421) internal successors, (215), 201 states have internal predecessors, (215), 40 states have call successors, (40), 16 states have call predecessors, (40), 24 states have return successors, (73), 37 states have call predecessors, (73), 39 states have call successors, (73) [2024-11-09 05:55:33,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 328 transitions. [2024-11-09 05:55:33,452 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 328 transitions. Word has length 74 [2024-11-09 05:55:33,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:55:33,452 INFO L471 AbstractCegarLoop]: Abstraction has 255 states and 328 transitions. [2024-11-09 05:55:33,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-09 05:55:33,453 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 328 transitions. [2024-11-09 05:55:33,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-09 05:55:33,455 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:55:33,455 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:55:33,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (85)] Forceful destruction successful, exit code 0 [2024-11-09 05:55:33,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (84)] Forceful destruction successful, exit code 0 [2024-11-09 05:55:33,873 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2024-11-09 05:55:34,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:55:34,057 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:55:34,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:55:34,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1251432157, now seen corresponding path program 2 times [2024-11-09 05:55:34,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:55:34,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1161163127] [2024-11-09 05:55:34,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 05:55:34,058 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 [2024-11-09 05:55:34,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:55:34,060 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:55:34,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (87)] Waiting until timeout for monitored process [2024-11-09 05:55:34,198 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 05:55:34,198 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:55:34,203 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-09 05:55:34,206 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:55:35,445 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 05:55:35,445 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:55:38,941 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 05:55:38,941 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:55:38,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1161163127] [2024-11-09 05:55:38,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1161163127] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:55:38,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [806064421] [2024-11-09 05:55:38,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 05:55:38,942 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 05:55:38,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 05:55:38,943 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 05:55:38,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (88)] Waiting until timeout for monitored process [2024-11-09 05:55:39,147 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 05:55:39,147 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:55:39,149 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-09 05:55:39,151 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:55:39,498 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 05:55:39,498 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:55:40,559 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 05:55:40,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [806064421] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:55:40,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252286206] [2024-11-09 05:55:40,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 05:55:40,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:55:40,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:55:40,561 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:55:40,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2024-11-09 05:55:40,676 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 05:55:40,677 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:55:40,680 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-09 05:55:40,682 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:55:41,878 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 05:55:41,878 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:55:43,030 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 05:55:43,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252286206] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:55:43,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 05:55:43,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 15, 16, 16, 16] total 33 [2024-11-09 05:55:43,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058474341] [2024-11-09 05:55:43,031 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 05:55:43,031 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-09 05:55:43,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:55:43,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-09 05:55:43,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=862, Unknown=0, NotChecked=0, Total=1056 [2024-11-09 05:55:43,033 INFO L87 Difference]: Start difference. First operand 255 states and 328 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-09 05:55:46,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:55:46,732 INFO L93 Difference]: Finished difference Result 290 states and 366 transitions. [2024-11-09 05:55:46,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-09 05:55:46,733 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) Word has length 74 [2024-11-09 05:55:46,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:55:46,735 INFO L225 Difference]: With dead ends: 290 [2024-11-09 05:55:46,735 INFO L226 Difference]: Without dead ends: 270 [2024-11-09 05:55:46,736 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 407 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=268, Invalid=1214, Unknown=0, NotChecked=0, Total=1482 [2024-11-09 05:55:46,736 INFO L432 NwaCegarLoop]: 85 mSDtfsCounter, 44 mSDsluCounter, 1215 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1300 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-11-09 05:55:46,736 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 1300 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-11-09 05:55:46,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2024-11-09 05:55:46,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 255. [2024-11-09 05:55:46,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 191 states have (on average 1.130890052356021) internal successors, (216), 201 states have internal predecessors, (216), 39 states have call successors, (39), 17 states have call predecessors, (39), 24 states have return successors, (67), 36 states have call predecessors, (67), 38 states have call successors, (67) [2024-11-09 05:55:46,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 322 transitions. [2024-11-09 05:55:46,803 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 322 transitions. Word has length 74 [2024-11-09 05:55:46,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:55:46,803 INFO L471 AbstractCegarLoop]: Abstraction has 255 states and 322 transitions. [2024-11-09 05:55:46,803 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-09 05:55:46,804 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 322 transitions. [2024-11-09 05:55:46,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-09 05:55:46,806 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:55:46,806 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:55:46,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2024-11-09 05:55:47,009 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (88)] Ended with exit code 0 [2024-11-09 05:55:47,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (87)] Ended with exit code 0 [2024-11-09 05:55:47,407 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 [2024-11-09 05:55:47,407 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:55:47,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:55:47,408 INFO L85 PathProgramCache]: Analyzing trace with hash 187453460, now seen corresponding path program 1 times [2024-11-09 05:55:47,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:55:47,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1323970993] [2024-11-09 05:55:47,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:55:47,409 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 [2024-11-09 05:55:47,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:55:47,410 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:55:47,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (90)] Waiting until timeout for monitored process [2024-11-09 05:55:47,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:55:47,525 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-09 05:55:47,527 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:55:48,865 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-09 05:55:48,865 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:55:53,200 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 05:55:53,200 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:55:53,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1323970993] [2024-11-09 05:55:53,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1323970993] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:55:53,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1113244513] [2024-11-09 05:55:53,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:55:53,201 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 05:55:53,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 05:55:53,202 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 05:55:53,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (91)] Waiting until timeout for monitored process [2024-11-09 05:55:53,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:55:53,431 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-09 05:55:53,433 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:55:53,860 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-09 05:55:53,861 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:55:55,420 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 05:55:55,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1113244513] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:55:55,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209145281] [2024-11-09 05:55:55,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:55:55,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:55:55,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:55:55,422 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:55:55,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2024-11-09 05:55:55,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:55:55,548 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-09 05:55:55,549 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:55:56,520 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-09 05:55:56,520 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:56:00,200 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 05:56:00,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209145281] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:56:00,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 05:56:00,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 15, 16, 14, 15] total 44 [2024-11-09 05:56:00,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370784478] [2024-11-09 05:56:00,201 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 05:56:00,201 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-09 05:56:00,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:56:00,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-09 05:56:00,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1654, Unknown=0, NotChecked=0, Total=1892 [2024-11-09 05:56:00,203 INFO L87 Difference]: Start difference. First operand 255 states and 322 transitions. Second operand has 44 states, 44 states have (on average 1.9545454545454546) internal successors, (86), 44 states have internal predecessors, (86), 14 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (19), 14 states have call predecessors, (19), 13 states have call successors, (19) [2024-11-09 05:56:10,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:56:10,127 INFO L93 Difference]: Finished difference Result 299 states and 374 transitions. [2024-11-09 05:56:10,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-09 05:56:10,129 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9545454545454546) internal successors, (86), 44 states have internal predecessors, (86), 14 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (19), 14 states have call predecessors, (19), 13 states have call successors, (19) Word has length 77 [2024-11-09 05:56:10,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:56:10,131 INFO L225 Difference]: With dead ends: 299 [2024-11-09 05:56:10,131 INFO L226 Difference]: Without dead ends: 241 [2024-11-09 05:56:10,133 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=603, Invalid=3429, Unknown=0, NotChecked=0, Total=4032 [2024-11-09 05:56:10,134 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 97 mSDsluCounter, 1298 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1368 SdHoareTripleChecker+Invalid, 1031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2024-11-09 05:56:10,134 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 1368 Invalid, 1031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 974 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2024-11-09 05:56:10,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2024-11-09 05:56:10,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 213. [2024-11-09 05:56:10,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 159 states have (on average 1.10062893081761) internal successors, (175), 167 states have internal predecessors, (175), 32 states have call successors, (32), 15 states have call predecessors, (32), 21 states have return successors, (56), 30 states have call predecessors, (56), 31 states have call successors, (56) [2024-11-09 05:56:10,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 263 transitions. [2024-11-09 05:56:10,188 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 263 transitions. Word has length 77 [2024-11-09 05:56:10,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:56:10,189 INFO L471 AbstractCegarLoop]: Abstraction has 213 states and 263 transitions. [2024-11-09 05:56:10,189 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.9545454545454546) internal successors, (86), 44 states have internal predecessors, (86), 14 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (19), 14 states have call predecessors, (19), 13 states have call successors, (19) [2024-11-09 05:56:10,189 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 263 transitions. [2024-11-09 05:56:10,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-09 05:56:10,190 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:56:10,190 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:56:10,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (91)] Ended with exit code 0 [2024-11-09 05:56:10,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (90)] Forceful destruction successful, exit code 0 [2024-11-09 05:56:10,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2024-11-09 05:56:10,791 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:56:10,792 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:56:10,792 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:56:10,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1505545125, now seen corresponding path program 1 times [2024-11-09 05:56:10,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:56:10,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [398326797] [2024-11-09 05:56:10,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:56:10,793 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 [2024-11-09 05:56:10,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:56:10,794 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:56:10,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (93)] Waiting until timeout for monitored process [2024-11-09 05:56:10,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:56:10,912 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 05:56:10,914 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:56:16,609 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 05:56:16,609 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:56:17,429 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:56:17,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [398326797] [2024-11-09 05:56:17,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [398326797] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:56:17,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [292344877] [2024-11-09 05:56:17,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:56:17,430 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 05:56:17,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 05:56:17,431 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 05:56:17,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (94)] Waiting until timeout for monitored process [2024-11-09 05:56:17,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:56:17,638 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 05:56:17,639 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:56:18,002 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 05:56:18,002 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:56:18,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [292344877] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:56:18,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789537405] [2024-11-09 05:56:18,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:56:18,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:56:18,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:56:18,779 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:56:18,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2024-11-09 05:56:18,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:56:18,917 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 05:56:18,920 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:56:35,922 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 05:56:35,922 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:56:36,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789537405] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:56:36,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:56:36,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14] total 16 [2024-11-09 05:56:36,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654717144] [2024-11-09 05:56:36,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:56:36,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-09 05:56:36,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:56:36,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-09 05:56:36,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=228, Unknown=8, NotChecked=0, Total=272 [2024-11-09 05:56:36,853 INFO L87 Difference]: Start difference. First operand 213 states and 263 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-09 05:56:39,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-09 05:56:41,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-09 05:56:43,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-09 05:56:46,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-09 05:56:48,639 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-09 05:56:50,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-09 05:56:52,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:56:52,356 INFO L93 Difference]: Finished difference Result 233 states and 286 transitions. [2024-11-09 05:56:52,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 05:56:52,357 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) Word has length 81 [2024-11-09 05:56:52,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:56:52,359 INFO L225 Difference]: With dead ends: 233 [2024-11-09 05:56:52,359 INFO L226 Difference]: Without dead ends: 224 [2024-11-09 05:56:52,360 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 249 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=41, Invalid=257, Unknown=8, NotChecked=0, Total=306 [2024-11-09 05:56:52,360 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 9 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 1 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 883 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:56:52,361 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 883 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 313 Invalid, 6 Unknown, 0 Unchecked, 15.3s Time] [2024-11-09 05:56:52,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2024-11-09 05:56:52,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 219. [2024-11-09 05:56:52,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 163 states have (on average 1.098159509202454) internal successors, (179), 171 states have internal predecessors, (179), 33 states have call successors, (33), 15 states have call predecessors, (33), 22 states have return successors, (60), 32 states have call predecessors, (60), 32 states have call successors, (60) [2024-11-09 05:56:52,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 272 transitions. [2024-11-09 05:56:52,421 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 272 transitions. Word has length 81 [2024-11-09 05:56:52,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:56:52,422 INFO L471 AbstractCegarLoop]: Abstraction has 219 states and 272 transitions. [2024-11-09 05:56:52,422 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-09 05:56:52,422 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 272 transitions. [2024-11-09 05:56:52,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-09 05:56:52,424 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:56:52,424 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:56:52,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (94)] Forceful destruction successful, exit code 0 [2024-11-09 05:56:52,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2024-11-09 05:56:52,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (93)] Forceful destruction successful, exit code 0 [2024-11-09 05:56:53,025 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 [2024-11-09 05:56:53,025 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:56:53,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:56:53,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1403218777, now seen corresponding path program 1 times [2024-11-09 05:56:53,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:56:53,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [843453228] [2024-11-09 05:56:53,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:56:53,026 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 [2024-11-09 05:56:53,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:56:53,028 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:56:53,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (96)] Waiting until timeout for monitored process [2024-11-09 05:56:53,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:56:53,139 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-09 05:56:53,141 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:56:53,942 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 05:56:53,942 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:56:54,280 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:56:54,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [843453228] [2024-11-09 05:56:54,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [843453228] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:56:54,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2043641256] [2024-11-09 05:56:54,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:56:54,281 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 05:56:54,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 05:56:54,284 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 05:56:54,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (97)] Waiting until timeout for monitored process [2024-11-09 05:56:54,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:56:54,501 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-09 05:56:54,502 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:56:54,889 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 05:56:54,890 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:56:55,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2043641256] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:56:55,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492092248] [2024-11-09 05:56:55,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:56:55,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:56:55,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:56:55,246 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:56:55,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2024-11-09 05:56:55,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:56:55,364 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 05:56:55,365 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:56:56,089 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 05:56:56,089 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:56:56,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492092248] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:56:56,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:56:56,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 15] total 15 [2024-11-09 05:56:56,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518010637] [2024-11-09 05:56:56,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:56:56,474 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 05:56:56,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:56:56,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 05:56:56,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2024-11-09 05:56:56,475 INFO L87 Difference]: Start difference. First operand 219 states and 272 transitions. Second operand has 15 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 6 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-09 05:56:59,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:56:59,247 INFO L93 Difference]: Finished difference Result 239 states and 295 transitions. [2024-11-09 05:56:59,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-09 05:56:59,248 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 6 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 81 [2024-11-09 05:56:59,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:56:59,250 INFO L225 Difference]: With dead ends: 239 [2024-11-09 05:56:59,250 INFO L226 Difference]: Without dead ends: 230 [2024-11-09 05:56:59,251 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 246 SyntacticMatches, 8 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2024-11-09 05:56:59,251 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 27 mSDsluCounter, 891 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 967 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:56:59,252 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 967 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-09 05:56:59,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2024-11-09 05:56:59,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 223. [2024-11-09 05:56:59,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 166 states have (on average 1.0963855421686748) internal successors, (182), 174 states have internal predecessors, (182), 33 states have call successors, (33), 15 states have call predecessors, (33), 23 states have return successors, (64), 33 states have call predecessors, (64), 32 states have call successors, (64) [2024-11-09 05:56:59,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 279 transitions. [2024-11-09 05:56:59,315 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 279 transitions. Word has length 81 [2024-11-09 05:56:59,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:56:59,315 INFO L471 AbstractCegarLoop]: Abstraction has 223 states and 279 transitions. [2024-11-09 05:56:59,316 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 6 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-09 05:56:59,316 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 279 transitions. [2024-11-09 05:56:59,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-09 05:56:59,317 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:56:59,318 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:56:59,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (97)] Forceful destruction successful, exit code 0 [2024-11-09 05:56:59,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (96)] Ended with exit code 0 [2024-11-09 05:56:59,734 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2024-11-09 05:56:59,919 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt,96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:56:59,919 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:56:59,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:56:59,919 INFO L85 PathProgramCache]: Analyzing trace with hash -528697517, now seen corresponding path program 2 times [2024-11-09 05:56:59,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:56:59,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1814746830] [2024-11-09 05:56:59,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 05:56:59,920 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 [2024-11-09 05:56:59,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:56:59,921 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:56:59,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (99)] Waiting until timeout for monitored process [2024-11-09 05:57:00,038 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 05:57:00,038 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:57:00,042 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 05:57:00,043 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:57:00,966 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-09 05:57:00,966 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:57:03,212 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:57:03,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1814746830] [2024-11-09 05:57:03,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1814746830] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:57:03,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2107232237] [2024-11-09 05:57:03,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 05:57:03,213 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 05:57:03,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 05:57:03,215 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 05:57:03,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (100)] Waiting until timeout for monitored process [2024-11-09 05:57:03,469 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 05:57:03,469 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:57:03,471 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 05:57:03,473 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:57:03,792 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-09 05:57:03,792 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:57:04,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2107232237] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:57:04,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072047323] [2024-11-09 05:57:04,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 05:57:04,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:57:04,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:57:04,445 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:57:04,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2024-11-09 05:57:04,567 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 05:57:04,567 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:57:04,569 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 05:57:04,571 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:57:06,170 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 05:57:06,171 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:57:11,057 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-09 05:57:11,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072047323] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:57:11,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2024-11-09 05:57:11,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 17, 13] total 31 [2024-11-09 05:57:11,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345564824] [2024-11-09 05:57:11,058 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2024-11-09 05:57:11,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-09 05:57:11,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:57:11,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-09 05:57:11,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1268, Unknown=0, NotChecked=0, Total=1406 [2024-11-09 05:57:11,060 INFO L87 Difference]: Start difference. First operand 223 states and 279 transitions. Second operand has 31 states, 30 states have (on average 2.966666666666667) internal successors, (89), 30 states have internal predecessors, (89), 13 states have call successors, (16), 2 states have call predecessors, (16), 6 states have return successors, (17), 13 states have call predecessors, (17), 12 states have call successors, (17) [2024-11-09 05:57:18,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:57:18,277 INFO L93 Difference]: Finished difference Result 321 states and 385 transitions. [2024-11-09 05:57:18,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-09 05:57:18,279 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.966666666666667) internal successors, (89), 30 states have internal predecessors, (89), 13 states have call successors, (16), 2 states have call predecessors, (16), 6 states have return successors, (17), 13 states have call predecessors, (17), 12 states have call successors, (17) Word has length 81 [2024-11-09 05:57:18,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:57:18,281 INFO L225 Difference]: With dead ends: 321 [2024-11-09 05:57:18,281 INFO L226 Difference]: Without dead ends: 216 [2024-11-09 05:57:18,283 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 350 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=431, Invalid=2761, Unknown=0, NotChecked=0, Total=3192 [2024-11-09 05:57:18,284 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 62 mSDsluCounter, 1346 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:57:18,284 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 1422 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2024-11-09 05:57:18,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2024-11-09 05:57:18,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 185. [2024-11-09 05:57:18,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 137 states have (on average 1.1094890510948905) internal successors, (152), 143 states have internal predecessors, (152), 28 states have call successors, (28), 13 states have call predecessors, (28), 19 states have return successors, (51), 28 states have call predecessors, (51), 27 states have call successors, (51) [2024-11-09 05:57:18,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 231 transitions. [2024-11-09 05:57:18,343 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 231 transitions. Word has length 81 [2024-11-09 05:57:18,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:57:18,343 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 231 transitions. [2024-11-09 05:57:18,343 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.966666666666667) internal successors, (89), 30 states have internal predecessors, (89), 13 states have call successors, (16), 2 states have call predecessors, (16), 6 states have return successors, (17), 13 states have call predecessors, (17), 12 states have call successors, (17) [2024-11-09 05:57:18,343 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 231 transitions. [2024-11-09 05:57:18,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-09 05:57:18,344 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:57:18,344 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:57:18,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (100)] Forceful destruction successful, exit code 0 [2024-11-09 05:57:18,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2024-11-09 05:57:18,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (99)] Forceful destruction successful, exit code 0 [2024-11-09 05:57:18,945 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt,101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 [2024-11-09 05:57:18,945 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:57:18,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:57:18,946 INFO L85 PathProgramCache]: Analyzing trace with hash -2008837227, now seen corresponding path program 1 times [2024-11-09 05:57:18,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:57:18,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [621994446] [2024-11-09 05:57:18,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:57:18,947 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 [2024-11-09 05:57:18,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:57:18,948 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:57:18,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (102)] Waiting until timeout for monitored process [2024-11-09 05:57:19,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:57:19,140 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-09 05:57:19,143 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:57:22,617 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-09 05:57:22,617 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:57:35,899 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 05:57:35,899 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:57:35,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [621994446] [2024-11-09 05:57:35,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [621994446] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:57:35,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1638212485] [2024-11-09 05:57:35,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:57:35,900 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 05:57:35,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 05:57:35,901 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 05:57:35,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (103)] Waiting until timeout for monitored process [2024-11-09 05:57:36,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:57:36,180 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-09 05:57:36,182 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:57:39,366 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-09 05:57:39,366 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:57:49,509 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 05:57:49,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1638212485] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:57:49,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993739781] [2024-11-09 05:57:49,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:57:49,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:57:49,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:57:49,511 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:57:49,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2024-11-09 05:57:49,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:57:49,770 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-09 05:57:49,772 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:57:51,142 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-09 05:57:51,143 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:57:56,111 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 05:57:56,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993739781] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:57:56,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 05:57:56,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24, 18, 18, 22, 23] total 70 [2024-11-09 05:57:56,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902634964] [2024-11-09 05:57:56,112 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 05:57:56,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2024-11-09 05:57:56,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:57:56,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2024-11-09 05:57:56,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=646, Invalid=4184, Unknown=0, NotChecked=0, Total=4830 [2024-11-09 05:57:56,116 INFO L87 Difference]: Start difference. First operand 185 states and 231 transitions. Second operand has 70 states, 68 states have (on average 1.6323529411764706) internal successors, (111), 67 states have internal predecessors, (111), 16 states have call successors, (19), 2 states have call predecessors, (19), 8 states have return successors, (21), 17 states have call predecessors, (21), 15 states have call successors, (21) [2024-11-09 05:58:14,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:58:14,959 INFO L93 Difference]: Finished difference Result 233 states and 284 transitions. [2024-11-09 05:58:14,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-09 05:58:14,960 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 68 states have (on average 1.6323529411764706) internal successors, (111), 67 states have internal predecessors, (111), 16 states have call successors, (19), 2 states have call predecessors, (19), 8 states have return successors, (21), 17 states have call predecessors, (21), 15 states have call successors, (21) Word has length 81 [2024-11-09 05:58:14,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:58:14,962 INFO L225 Difference]: With dead ends: 233 [2024-11-09 05:58:14,962 INFO L226 Difference]: Without dead ends: 211 [2024-11-09 05:58:14,965 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 412 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 34.7s TimeCoverageRelationStatistics Valid=1017, Invalid=6465, Unknown=0, NotChecked=0, Total=7482 [2024-11-09 05:58:14,966 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 92 mSDsluCounter, 2035 mSDsCounter, 0 mSdLazyCounter, 1905 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 2100 SdHoareTripleChecker+Invalid, 1971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:58:14,966 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 2100 Invalid, 1971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1905 Invalid, 0 Unknown, 0 Unchecked, 11.0s Time] [2024-11-09 05:58:14,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2024-11-09 05:58:15,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 194. [2024-11-09 05:58:15,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 146 states have (on average 1.1095890410958904) internal successors, (162), 150 states have internal predecessors, (162), 28 states have call successors, (28), 14 states have call predecessors, (28), 19 states have return successors, (48), 29 states have call predecessors, (48), 27 states have call successors, (48) [2024-11-09 05:58:15,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 238 transitions. [2024-11-09 05:58:15,037 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 238 transitions. Word has length 81 [2024-11-09 05:58:15,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:58:15,038 INFO L471 AbstractCegarLoop]: Abstraction has 194 states and 238 transitions. [2024-11-09 05:58:15,038 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 68 states have (on average 1.6323529411764706) internal successors, (111), 67 states have internal predecessors, (111), 16 states have call successors, (19), 2 states have call predecessors, (19), 8 states have return successors, (21), 17 states have call predecessors, (21), 15 states have call successors, (21) [2024-11-09 05:58:15,038 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 238 transitions. [2024-11-09 05:58:15,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-09 05:58:15,040 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:58:15,040 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:58:15,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (102)] Forceful destruction successful, exit code 0 [2024-11-09 05:58:15,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (103)] Ended with exit code 0 [2024-11-09 05:58:15,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2024-11-09 05:58:15,641 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt,104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:58:15,641 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:58:15,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:58:15,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1610599360, now seen corresponding path program 1 times [2024-11-09 05:58:15,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:58:15,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [401115884] [2024-11-09 05:58:15,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:58:15,642 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 [2024-11-09 05:58:15,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:58:15,643 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:58:15,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (105)] Waiting until timeout for monitored process [2024-11-09 05:58:15,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:58:15,771 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-09 05:58:15,773 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:58:16,929 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-09 05:58:16,929 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:58:19,921 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 05:58:19,921 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:58:19,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [401115884] [2024-11-09 05:58:19,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [401115884] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:58:19,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [323316089] [2024-11-09 05:58:19,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:58:19,922 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 05:58:19,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 05:58:19,923 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 05:58:19,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (106)] Waiting until timeout for monitored process [2024-11-09 05:58:20,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:58:20,173 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-09 05:58:20,175 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:58:20,538 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-09 05:58:20,538 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:58:21,471 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 05:58:21,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [323316089] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:58:21,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147675231] [2024-11-09 05:58:21,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:58:21,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:58:21,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:58:21,474 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:58:21,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2024-11-09 05:58:21,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:58:21,626 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-09 05:58:21,628 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:58:22,000 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-09 05:58:22,000 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:58:23,082 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 05:58:23,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147675231] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:58:23,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 05:58:23,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14, 15, 14, 15] total 26 [2024-11-09 05:58:23,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295261054] [2024-11-09 05:58:23,083 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 05:58:23,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-09 05:58:23,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:58:23,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-09 05:58:23,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2024-11-09 05:58:23,085 INFO L87 Difference]: Start difference. First operand 194 states and 238 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-09 05:58:25,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:58:25,468 INFO L93 Difference]: Finished difference Result 229 states and 275 transitions. [2024-11-09 05:58:25,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-09 05:58:25,471 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) Word has length 78 [2024-11-09 05:58:25,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:58:25,472 INFO L225 Difference]: With dead ends: 229 [2024-11-09 05:58:25,473 INFO L226 Difference]: Without dead ends: 174 [2024-11-09 05:58:25,473 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2024-11-09 05:58:25,474 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 40 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:58:25,475 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 751 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-09 05:58:25,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2024-11-09 05:58:25,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2024-11-09 05:58:25,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 131 states have (on average 1.099236641221374) internal successors, (144), 134 states have internal predecessors, (144), 25 states have call successors, (25), 13 states have call predecessors, (25), 17 states have return successors, (43), 26 states have call predecessors, (43), 24 states have call successors, (43) [2024-11-09 05:58:25,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 212 transitions. [2024-11-09 05:58:25,538 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 212 transitions. Word has length 78 [2024-11-09 05:58:25,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:58:25,539 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 212 transitions. [2024-11-09 05:58:25,539 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-09 05:58:25,539 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 212 transitions. [2024-11-09 05:58:25,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-09 05:58:25,541 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:58:25,541 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:58:25,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (105)] Forceful destruction successful, exit code 0 [2024-11-09 05:58:25,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2024-11-09 05:58:25,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (106)] Ended with exit code 0 [2024-11-09 05:58:26,142 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt [2024-11-09 05:58:26,142 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:58:26,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:58:26,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1733171417, now seen corresponding path program 2 times [2024-11-09 05:58:26,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:58:26,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2140047480] [2024-11-09 05:58:26,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 05:58:26,143 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 [2024-11-09 05:58:26,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:58:26,144 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:58:26,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (108)] Waiting until timeout for monitored process [2024-11-09 05:58:26,319 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 05:58:26,319 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:58:26,323 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-09 05:58:26,325 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:58:28,580 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-09 05:58:28,580 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:58:34,820 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 05:58:34,820 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:58:34,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2140047480] [2024-11-09 05:58:34,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2140047480] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:58:34,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1849031712] [2024-11-09 05:58:34,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 05:58:34,821 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 05:58:34,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 05:58:34,822 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 05:58:34,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (109)] Waiting until timeout for monitored process [2024-11-09 05:58:35,092 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 05:58:35,093 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:58:35,095 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-09 05:58:35,097 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:58:35,730 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-09 05:58:35,730 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:58:37,442 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 05:58:37,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1849031712] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:58:37,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275314991] [2024-11-09 05:58:37,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 05:58:37,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:58:37,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:58:37,444 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:58:37,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2024-11-09 05:58:37,715 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 05:58:37,715 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:58:37,718 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-09 05:58:37,721 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:58:42,271 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-09 05:58:42,272 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:59:00,075 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-09 05:59:00,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275314991] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:59:00,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 05:59:00,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18, 18, 24, 26] total 69 [2024-11-09 05:59:00,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385712881] [2024-11-09 05:59:00,076 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 05:59:00,076 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-11-09 05:59:00,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:59:00,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-11-09 05:59:00,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=4092, Unknown=0, NotChecked=0, Total=4692 [2024-11-09 05:59:00,079 INFO L87 Difference]: Start difference. First operand 174 states and 212 transitions. Second operand has 69 states, 67 states have (on average 1.626865671641791) internal successors, (109), 65 states have internal predecessors, (109), 15 states have call successors, (18), 2 states have call predecessors, (18), 9 states have return successors, (20), 16 states have call predecessors, (20), 14 states have call successors, (20) [2024-11-09 05:59:12,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:59:12,505 INFO L93 Difference]: Finished difference Result 206 states and 249 transitions. [2024-11-09 05:59:12,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-09 05:59:12,507 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 67 states have (on average 1.626865671641791) internal successors, (109), 65 states have internal predecessors, (109), 15 states have call successors, (18), 2 states have call predecessors, (18), 9 states have return successors, (20), 16 states have call predecessors, (20), 14 states have call successors, (20) Word has length 81 [2024-11-09 05:59:12,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:59:12,508 INFO L225 Difference]: With dead ends: 206 [2024-11-09 05:59:12,508 INFO L226 Difference]: Without dead ends: 159 [2024-11-09 05:59:12,510 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 412 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1612 ImplicationChecksByTransitivity, 29.3s TimeCoverageRelationStatistics Valid=830, Invalid=5812, Unknown=0, NotChecked=0, Total=6642 [2024-11-09 05:59:12,511 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 49 mSDsluCounter, 1350 mSDsCounter, 0 mSdLazyCounter, 1461 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 1400 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2024-11-09 05:59:12,511 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 1400 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1461 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2024-11-09 05:59:12,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-11-09 05:59:12,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 141. [2024-11-09 05:59:12,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 105 states have (on average 1.1238095238095238) internal successors, (118), 108 states have internal predecessors, (118), 21 states have call successors, (21), 10 states have call predecessors, (21), 14 states have return successors, (38), 22 states have call predecessors, (38), 20 states have call successors, (38) [2024-11-09 05:59:12,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 177 transitions. [2024-11-09 05:59:12,560 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 177 transitions. Word has length 81 [2024-11-09 05:59:12,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:59:12,560 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 177 transitions. [2024-11-09 05:59:12,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 67 states have (on average 1.626865671641791) internal successors, (109), 65 states have internal predecessors, (109), 15 states have call successors, (18), 2 states have call predecessors, (18), 9 states have return successors, (20), 16 states have call predecessors, (20), 14 states have call successors, (20) [2024-11-09 05:59:12,561 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 177 transitions. [2024-11-09 05:59:12,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-11-09 05:59:12,562 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:59:12,563 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:59:12,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2024-11-09 05:59:12,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (108)] Ended with exit code 0 [2024-11-09 05:59:12,966 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (109)] Ended with exit code 0 [2024-11-09 05:59:13,163 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt [2024-11-09 05:59:13,163 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:59:13,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:59:13,164 INFO L85 PathProgramCache]: Analyzing trace with hash -433301397, now seen corresponding path program 1 times [2024-11-09 05:59:13,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:59:13,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [157152835] [2024-11-09 05:59:13,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:59:13,164 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 [2024-11-09 05:59:13,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:59:13,166 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:59:13,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (111)] Waiting until timeout for monitored process [2024-11-09 05:59:13,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:59:13,282 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 05:59:13,284 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:59:13,627 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 05:59:13,627 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:59:14,336 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 05:59:14,336 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:59:14,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [157152835] [2024-11-09 05:59:14,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [157152835] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:59:14,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1293265029] [2024-11-09 05:59:14,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:59:14,337 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 05:59:14,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 05:59:14,338 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 05:59:14,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (112)] Waiting until timeout for monitored process [2024-11-09 05:59:14,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:59:14,589 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 05:59:14,591 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:59:14,758 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 05:59:14,759 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:59:15,142 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 05:59:15,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1293265029] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:59:15,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999118317] [2024-11-09 05:59:15,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:59:15,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:59:15,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:59:15,144 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:59:15,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2024-11-09 05:59:15,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:59:15,274 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 05:59:15,275 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:59:15,396 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 05:59:15,396 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:59:15,732 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 05:59:15,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999118317] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:59:15,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 05:59:15,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 17 [2024-11-09 05:59:15,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678544960] [2024-11-09 05:59:15,733 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 05:59:15,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 05:59:15,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:59:15,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 05:59:15,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2024-11-09 05:59:15,734 INFO L87 Difference]: Start difference. First operand 141 states and 177 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 15 states have internal predecessors, (67), 7 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 9 states have call predecessors, (13), 6 states have call successors, (13) [2024-11-09 05:59:16,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:59:16,590 INFO L93 Difference]: Finished difference Result 152 states and 189 transitions. [2024-11-09 05:59:16,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 05:59:16,591 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 15 states have internal predecessors, (67), 7 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 9 states have call predecessors, (13), 6 states have call successors, (13) Word has length 82 [2024-11-09 05:59:16,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:59:16,592 INFO L225 Difference]: With dead ends: 152 [2024-11-09 05:59:16,592 INFO L226 Difference]: Without dead ends: 120 [2024-11-09 05:59:16,592 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2024-11-09 05:59:16,593 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 29 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 05:59:16,593 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 773 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 05:59:16,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-09 05:59:16,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2024-11-09 05:59:16,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 87 states have (on average 1.1494252873563218) internal successors, (100), 89 states have internal predecessors, (100), 18 states have call successors, (18), 8 states have call predecessors, (18), 11 states have return successors, (33), 19 states have call predecessors, (33), 17 states have call successors, (33) [2024-11-09 05:59:16,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 151 transitions. [2024-11-09 05:59:16,627 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 151 transitions. Word has length 82 [2024-11-09 05:59:16,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:59:16,628 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 151 transitions. [2024-11-09 05:59:16,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 15 states have internal predecessors, (67), 7 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 9 states have call predecessors, (13), 6 states have call successors, (13) [2024-11-09 05:59:16,628 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 151 transitions. [2024-11-09 05:59:16,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-11-09 05:59:16,629 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:59:16,629 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:59:16,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2024-11-09 05:59:16,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (111)] Forceful destruction successful, exit code 0 [2024-11-09 05:59:17,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (112)] Forceful destruction successful, exit code 0 [2024-11-09 05:59:17,230 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt [2024-11-09 05:59:17,230 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:59:17,230 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:59:17,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1167144879, now seen corresponding path program 1 times [2024-11-09 05:59:17,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:59:17,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [823042172] [2024-11-09 05:59:17,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:59:17,231 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 [2024-11-09 05:59:17,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:59:17,232 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:59:17,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (114)] Waiting until timeout for monitored process [2024-11-09 05:59:17,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:59:17,359 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 05:59:17,360 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:59:17,727 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 05:59:17,727 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:59:18,438 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 05:59:18,439 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:59:18,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [823042172] [2024-11-09 05:59:18,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [823042172] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:59:18,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1379103233] [2024-11-09 05:59:18,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:59:18,439 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 05:59:18,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 05:59:18,441 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 05:59:18,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (115)] Waiting until timeout for monitored process [2024-11-09 05:59:18,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:59:18,683 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 05:59:18,684 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:59:18,838 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 05:59:18,839 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:59:19,287 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 05:59:19,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1379103233] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:59:19,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443167733] [2024-11-09 05:59:19,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:59:19,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:59:19,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:59:19,289 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:59:19,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2024-11-09 05:59:19,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:59:19,424 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 05:59:19,426 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:59:19,585 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 05:59:19,585 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:59:20,041 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 05:59:20,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443167733] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:59:20,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 05:59:20,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 15 [2024-11-09 05:59:20,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943845609] [2024-11-09 05:59:20,042 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 05:59:20,042 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 05:59:20,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:59:20,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 05:59:20,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-11-09 05:59:20,043 INFO L87 Difference]: Start difference. First operand 117 states and 151 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-09 05:59:21,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:59:21,114 INFO L93 Difference]: Finished difference Result 126 states and 159 transitions. [2024-11-09 05:59:21,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 05:59:21,115 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 82 [2024-11-09 05:59:21,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:59:21,116 INFO L225 Difference]: With dead ends: 126 [2024-11-09 05:59:21,116 INFO L226 Difference]: Without dead ends: 106 [2024-11-09 05:59:21,116 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2024-11-09 05:59:21,117 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 61 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 05:59:21,117 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 696 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 05:59:21,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-09 05:59:21,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2024-11-09 05:59:21,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 78 states have (on average 1.1538461538461537) internal successors, (90), 81 states have internal predecessors, (90), 16 states have call successors, (16), 7 states have call predecessors, (16), 11 states have return successors, (29), 17 states have call predecessors, (29), 15 states have call successors, (29) [2024-11-09 05:59:21,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 135 transitions. [2024-11-09 05:59:21,162 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 135 transitions. Word has length 82 [2024-11-09 05:59:21,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:59:21,162 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 135 transitions. [2024-11-09 05:59:21,162 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-09 05:59:21,163 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 135 transitions. [2024-11-09 05:59:21,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-09 05:59:21,164 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:59:21,164 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:59:21,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2024-11-09 05:59:21,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (114)] Forceful destruction successful, exit code 0 [2024-11-09 05:59:21,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (115)] Ended with exit code 0 [2024-11-09 05:59:21,765 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt [2024-11-09 05:59:21,765 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:59:21,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:59:21,765 INFO L85 PathProgramCache]: Analyzing trace with hash 2066309629, now seen corresponding path program 1 times [2024-11-09 05:59:21,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:59:21,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1191319946] [2024-11-09 05:59:21,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:59:21,766 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 [2024-11-09 05:59:21,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:59:21,767 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:59:21,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (117)] Waiting until timeout for monitored process [2024-11-09 05:59:21,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:59:21,896 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 05:59:21,897 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:59:33,887 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 05:59:33,887 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:59:37,701 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 05:59:37,701 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 05:59:37,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1191319946] [2024-11-09 05:59:37,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1191319946] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:59:37,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [499074448] [2024-11-09 05:59:37,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:59:37,702 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 05:59:37,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 05:59:37,703 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 05:59:37,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (118)] Waiting until timeout for monitored process [2024-11-09 05:59:37,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:59:37,940 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 05:59:37,942 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:59:38,323 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 05:59:38,323 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:59:39,109 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 05:59:39,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [499074448] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:59:39,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477150651] [2024-11-09 05:59:39,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:59:39,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:59:39,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:59:39,111 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:59:39,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2024-11-09 05:59:39,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:59:39,245 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 05:59:39,247 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:59:39,619 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 05:59:39,619 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:59:40,387 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 05:59:40,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477150651] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:59:40,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 05:59:40,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 14, 14] total 25 [2024-11-09 05:59:40,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783672128] [2024-11-09 05:59:40,388 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 05:59:40,388 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-09 05:59:40,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 05:59:40,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-09 05:59:40,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=509, Unknown=4, NotChecked=0, Total=600 [2024-11-09 05:59:40,389 INFO L87 Difference]: Start difference. First operand 106 states and 135 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 10 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 10 states have call predecessors, (13), 9 states have call successors, (13) [2024-11-09 05:59:47,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-09 05:59:49,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-09 05:59:55,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:59:55,156 INFO L93 Difference]: Finished difference Result 120 states and 149 transitions. [2024-11-09 05:59:55,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-09 05:59:55,157 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 10 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 10 states have call predecessors, (13), 9 states have call successors, (13) Word has length 79 [2024-11-09 05:59:55,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:59:55,159 INFO L225 Difference]: With dead ends: 120 [2024-11-09 05:59:55,159 INFO L226 Difference]: Without dead ends: 113 [2024-11-09 05:59:55,159 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 445 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 23.9s TimeCoverageRelationStatistics Valid=189, Invalid=996, Unknown=5, NotChecked=0, Total=1190 [2024-11-09 05:59:55,160 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 47 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 9 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:59:55,160 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 691 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 292 Invalid, 2 Unknown, 0 Unchecked, 5.4s Time] [2024-11-09 05:59:55,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-11-09 05:59:55,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 106. [2024-11-09 05:59:55,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 78 states have (on average 1.1538461538461537) internal successors, (90), 81 states have internal predecessors, (90), 16 states have call successors, (16), 7 states have call predecessors, (16), 11 states have return successors, (28), 17 states have call predecessors, (28), 15 states have call successors, (28) [2024-11-09 05:59:55,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 134 transitions. [2024-11-09 05:59:55,197 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 134 transitions. Word has length 79 [2024-11-09 05:59:55,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:59:55,197 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 134 transitions. [2024-11-09 05:59:55,198 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 10 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 10 states have call predecessors, (13), 9 states have call successors, (13) [2024-11-09 05:59:55,198 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 134 transitions. [2024-11-09 05:59:55,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-09 05:59:55,199 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:59:55,199 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:59:55,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (118)] Forceful destruction successful, exit code 0 [2024-11-09 05:59:55,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (117)] Forceful destruction successful, exit code 0 [2024-11-09 05:59:55,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2024-11-09 05:59:55,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt,117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:59:55,800 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:59:55,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:59:55,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1847454911, now seen corresponding path program 1 times [2024-11-09 05:59:55,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 05:59:55,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [807507791] [2024-11-09 05:59:55,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:59:55,801 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 [2024-11-09 05:59:55,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 05:59:55,803 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 05:59:55,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (120)] Waiting until timeout for monitored process [2024-11-09 05:59:55,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:59:56,001 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-09 05:59:56,002 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:59:58,280 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-09 05:59:58,280 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:00:05,057 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 06:00:05,058 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 06:00:05,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [807507791] [2024-11-09 06:00:05,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [807507791] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:00:05,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1797782619] [2024-11-09 06:00:05,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:00:05,058 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 06:00:05,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 06:00:05,060 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 06:00:05,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (121)] Waiting until timeout for monitored process [2024-11-09 06:00:05,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:00:05,373 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-09 06:00:05,375 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:00:06,388 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-09 06:00:06,388 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:00:09,386 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 06:00:09,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1797782619] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:00:09,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102023819] [2024-11-09 06:00:09,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:00:09,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:00:09,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:00:09,388 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:00:09,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2024-11-09 06:00:09,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:00:09,667 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-09 06:00:09,669 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:00:14,378 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-09 06:00:14,378 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:00:23,957 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 06:00:23,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102023819] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:00:23,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 06:00:23,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18, 17, 22, 24] total 62 [2024-11-09 06:00:23,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123792710] [2024-11-09 06:00:23,958 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 06:00:23,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-11-09 06:00:23,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 06:00:23,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-11-09 06:00:23,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=3413, Unknown=0, NotChecked=0, Total=3782 [2024-11-09 06:00:23,960 INFO L87 Difference]: Start difference. First operand 106 states and 134 transitions. Second operand has 62 states, 60 states have (on average 1.6833333333333333) internal successors, (101), 59 states have internal predecessors, (101), 16 states have call successors, (19), 2 states have call predecessors, (19), 8 states have return successors, (21), 17 states have call predecessors, (21), 15 states have call successors, (21) [2024-11-09 06:00:41,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:00:41,453 INFO L93 Difference]: Finished difference Result 147 states and 180 transitions. [2024-11-09 06:00:41,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-09 06:00:41,455 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 60 states have (on average 1.6833333333333333) internal successors, (101), 59 states have internal predecessors, (101), 16 states have call successors, (19), 2 states have call predecessors, (19), 8 states have return successors, (21), 17 states have call predecessors, (21), 15 states have call successors, (21) Word has length 79 [2024-11-09 06:00:41,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:00:41,457 INFO L225 Difference]: With dead ends: 147 [2024-11-09 06:00:41,457 INFO L226 Difference]: Without dead ends: 134 [2024-11-09 06:00:41,459 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 408 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1715 ImplicationChecksByTransitivity, 27.8s TimeCoverageRelationStatistics Valid=885, Invalid=6771, Unknown=0, NotChecked=0, Total=7656 [2024-11-09 06:00:41,459 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 152 mSDsluCounter, 1266 mSDsCounter, 0 mSdLazyCounter, 1529 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 1327 SdHoareTripleChecker+Invalid, 1642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2024-11-09 06:00:41,459 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 1327 Invalid, 1642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1529 Invalid, 0 Unknown, 0 Unchecked, 8.6s Time] [2024-11-09 06:00:41,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-11-09 06:00:41,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 124. [2024-11-09 06:00:41,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 94 states have (on average 1.1595744680851063) internal successors, (109), 96 states have internal predecessors, (109), 18 states have call successors, (18), 8 states have call predecessors, (18), 11 states have return successors, (28), 19 states have call predecessors, (28), 17 states have call successors, (28) [2024-11-09 06:00:41,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 155 transitions. [2024-11-09 06:00:41,506 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 155 transitions. Word has length 79 [2024-11-09 06:00:41,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:00:41,506 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 155 transitions. [2024-11-09 06:00:41,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 60 states have (on average 1.6833333333333333) internal successors, (101), 59 states have internal predecessors, (101), 16 states have call successors, (19), 2 states have call predecessors, (19), 8 states have return successors, (21), 17 states have call predecessors, (21), 15 states have call successors, (21) [2024-11-09 06:00:41,507 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 155 transitions. [2024-11-09 06:00:41,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-11-09 06:00:41,508 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:00:41,508 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:00:41,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (121)] Ended with exit code 0 [2024-11-09 06:00:41,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2024-11-09 06:00:41,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (120)] Forceful destruction successful, exit code 0 [2024-11-09 06:00:42,109 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt,122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 [2024-11-09 06:00:42,109 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:00:42,110 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:00:42,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1205295851, now seen corresponding path program 2 times [2024-11-09 06:00:42,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 06:00:42,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [560414233] [2024-11-09 06:00:42,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 06:00:42,110 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 [2024-11-09 06:00:42,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 06:00:42,112 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 06:00:42,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (123)] Waiting until timeout for monitored process [2024-11-09 06:00:42,248 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 06:00:42,248 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:00:42,251 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 06:00:42,252 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:00:42,643 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 06:00:42,643 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:00:43,375 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 06:00:43,375 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 06:00:43,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [560414233] [2024-11-09 06:00:43,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [560414233] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:00:43,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1331125091] [2024-11-09 06:00:43,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 06:00:43,376 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 06:00:43,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 06:00:43,377 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 06:00:43,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (124)] Waiting until timeout for monitored process [2024-11-09 06:00:43,635 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 06:00:43,635 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:00:43,637 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 06:00:43,638 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:00:43,788 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 06:00:43,788 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:00:44,332 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 06:00:44,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1331125091] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:00:44,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294080968] [2024-11-09 06:00:44,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 06:00:44,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:00:44,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:00:44,334 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:00:44,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2024-11-09 06:00:44,468 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 06:00:44,469 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:00:44,471 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 06:00:44,472 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:00:44,626 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 06:00:44,626 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:00:45,071 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 06:00:45,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294080968] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:00:45,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 06:00:45,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 15 [2024-11-09 06:00:45,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575697387] [2024-11-09 06:00:45,071 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 06:00:45,072 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 06:00:45,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 06:00:45,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 06:00:45,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-11-09 06:00:45,073 INFO L87 Difference]: Start difference. First operand 124 states and 155 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-09 06:00:46,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:00:46,075 INFO L93 Difference]: Finished difference Result 131 states and 161 transitions. [2024-11-09 06:00:46,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 06:00:46,076 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 82 [2024-11-09 06:00:46,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:00:46,077 INFO L225 Difference]: With dead ends: 131 [2024-11-09 06:00:46,077 INFO L226 Difference]: Without dead ends: 115 [2024-11-09 06:00:46,078 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2024-11-09 06:00:46,078 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 71 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 06:00:46,079 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 647 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 06:00:46,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-11-09 06:00:46,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 107. [2024-11-09 06:00:46,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 80 states have (on average 1.1625) internal successors, (93), 83 states have internal predecessors, (93), 16 states have call successors, (16), 7 states have call predecessors, (16), 10 states have return successors, (25), 16 states have call predecessors, (25), 15 states have call successors, (25) [2024-11-09 06:00:46,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 134 transitions. [2024-11-09 06:00:46,118 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 134 transitions. Word has length 82 [2024-11-09 06:00:46,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:00:46,119 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 134 transitions. [2024-11-09 06:00:46,119 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-09 06:00:46,119 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 134 transitions. [2024-11-09 06:00:46,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-09 06:00:46,120 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:00:46,121 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:00:46,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (123)] Forceful destruction successful, exit code 0 [2024-11-09 06:00:46,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (124)] Ended with exit code 0 [2024-11-09 06:00:46,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2024-11-09 06:00:46,721 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt,125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:00:46,722 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:00:46,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:00:46,722 INFO L85 PathProgramCache]: Analyzing trace with hash 138036927, now seen corresponding path program 2 times [2024-11-09 06:00:46,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 06:00:46,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1847275352] [2024-11-09 06:00:46,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 06:00:46,723 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 [2024-11-09 06:00:46,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 06:00:46,724 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 06:00:46,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (126)] Waiting until timeout for monitored process [2024-11-09 06:00:46,917 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 06:00:46,917 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:00:46,920 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-09 06:00:46,923 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:00:49,093 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-09 06:00:49,093 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:00:55,269 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 06:00:55,269 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 06:00:55,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1847275352] [2024-11-09 06:00:55,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1847275352] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:00:55,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [488223855] [2024-11-09 06:00:55,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 06:00:55,270 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 06:00:55,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 06:00:55,271 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 06:00:55,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (127)] Waiting until timeout for monitored process [2024-11-09 06:00:55,563 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 06:00:55,563 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:00:55,565 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-09 06:00:55,567 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:00:56,263 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-09 06:00:56,263 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:00:57,885 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 06:00:57,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [488223855] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:00:57,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77500862] [2024-11-09 06:00:57,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 06:00:57,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:00:57,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:00:57,888 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:00:57,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2024-11-09 06:00:58,142 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 06:00:58,142 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:00:58,145 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-09 06:00:58,147 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:01:02,202 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-09 06:01:02,202 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:01:10,714 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 06:01:10,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77500862] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:01:10,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 06:01:10,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18, 18, 22, 24] total 59 [2024-11-09 06:01:10,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70567122] [2024-11-09 06:01:10,715 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 06:01:10,716 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-11-09 06:01:10,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 06:01:10,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-11-09 06:01:10,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=3077, Unknown=0, NotChecked=0, Total=3422 [2024-11-09 06:01:10,718 INFO L87 Difference]: Start difference. First operand 107 states and 134 transitions. Second operand has 59 states, 57 states have (on average 1.6491228070175439) internal successors, (94), 56 states have internal predecessors, (94), 15 states have call successors, (18), 2 states have call predecessors, (18), 8 states have return successors, (20), 16 states have call predecessors, (20), 14 states have call successors, (20) [2024-11-09 06:01:27,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:01:27,215 INFO L93 Difference]: Finished difference Result 142 states and 174 transitions. [2024-11-09 06:01:27,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-09 06:01:27,217 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 57 states have (on average 1.6491228070175439) internal successors, (94), 56 states have internal predecessors, (94), 15 states have call successors, (18), 2 states have call predecessors, (18), 8 states have return successors, (20), 16 states have call predecessors, (20), 14 states have call successors, (20) Word has length 79 [2024-11-09 06:01:27,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:01:27,218 INFO L225 Difference]: With dead ends: 142 [2024-11-09 06:01:27,218 INFO L226 Difference]: Without dead ends: 121 [2024-11-09 06:01:27,219 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 410 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 24.3s TimeCoverageRelationStatistics Valid=881, Invalid=6429, Unknown=0, NotChecked=0, Total=7310 [2024-11-09 06:01:27,219 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 70 mSDsluCounter, 1284 mSDsCounter, 0 mSdLazyCounter, 1494 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1343 SdHoareTripleChecker+Invalid, 1530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2024-11-09 06:01:27,219 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 1343 Invalid, 1530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1494 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2024-11-09 06:01:27,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-11-09 06:01:27,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 96. [2024-11-09 06:01:27,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 73 states have internal predecessors, (81), 15 states have call successors, (15), 7 states have call predecessors, (15), 9 states have return successors, (22), 15 states have call predecessors, (22), 14 states have call successors, (22) [2024-11-09 06:01:27,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 118 transitions. [2024-11-09 06:01:27,251 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 118 transitions. Word has length 79 [2024-11-09 06:01:27,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:01:27,252 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 118 transitions. [2024-11-09 06:01:27,252 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 57 states have (on average 1.6491228070175439) internal successors, (94), 56 states have internal predecessors, (94), 15 states have call successors, (18), 2 states have call predecessors, (18), 8 states have return successors, (20), 16 states have call predecessors, (20), 14 states have call successors, (20) [2024-11-09 06:01:27,252 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 118 transitions. [2024-11-09 06:01:27,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-09 06:01:27,253 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:01:27,253 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:01:27,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (127)] Forceful destruction successful, exit code 0 [2024-11-09 06:01:27,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2024-11-09 06:01:27,656 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (126)] Ended with exit code 0 [2024-11-09 06:01:27,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt,128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 [2024-11-09 06:01:27,854 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:01:27,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:01:27,854 INFO L85 PathProgramCache]: Analyzing trace with hash -13463194, now seen corresponding path program 1 times [2024-11-09 06:01:27,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 06:01:27,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1262989095] [2024-11-09 06:01:27,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:01:27,855 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 [2024-11-09 06:01:27,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 06:01:27,859 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 06:01:27,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (129)] Waiting until timeout for monitored process [2024-11-09 06:01:28,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:01:28,624 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-09 06:01:28,627 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:01:32,868 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-09 06:01:32,869 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:01:46,129 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-09 06:01:46,130 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 06:01:46,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1262989095] [2024-11-09 06:01:46,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1262989095] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:01:46,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [836350606] [2024-11-09 06:01:46,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:01:46,130 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 06:01:46,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 06:01:46,134 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 06:01:46,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (130)] Waiting until timeout for monitored process [2024-11-09 06:01:46,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:01:46,791 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-09 06:01:46,794 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:01:47,818 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-09 06:01:47,818 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:01:50,538 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-09 06:01:50,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [836350606] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:01:50,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987321332] [2024-11-09 06:01:50,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:01:50,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:01:50,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:01:50,540 INFO L229 MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:01:50,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2024-11-09 06:01:51,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:01:51,466 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-09 06:01:51,469 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:01:52,442 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-09 06:01:52,443 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:01:55,118 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-09 06:01:55,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987321332] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:01:55,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 06:01:55,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 24, 23, 24, 23] total 45 [2024-11-09 06:01:55,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449123377] [2024-11-09 06:01:55,119 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 06:01:55,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-09 06:01:55,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 06:01:55,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-09 06:01:55,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1798, Unknown=0, NotChecked=0, Total=1980 [2024-11-09 06:01:55,121 INFO L87 Difference]: Start difference. First operand 96 states and 118 transitions. Second operand has 45 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 41 states have internal predecessors, (69), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2024-11-09 06:02:14,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:02:14,808 INFO L93 Difference]: Finished difference Result 119 states and 145 transitions. [2024-11-09 06:02:14,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-09 06:02:14,808 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 41 states have internal predecessors, (69), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) Word has length 84 [2024-11-09 06:02:14,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:02:14,809 INFO L225 Difference]: With dead ends: 119 [2024-11-09 06:02:14,810 INFO L226 Difference]: Without dead ends: 109 [2024-11-09 06:02:14,811 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=369, Invalid=3791, Unknown=0, NotChecked=0, Total=4160 [2024-11-09 06:02:14,811 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 36 mSDsluCounter, 1290 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 1346 SdHoareTripleChecker+Invalid, 1396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2024-11-09 06:02:14,812 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 1346 Invalid, 1396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2024-11-09 06:02:14,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-11-09 06:02:14,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2024-11-09 06:02:14,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 79 states have (on average 1.139240506329114) internal successors, (90), 80 states have internal predecessors, (90), 16 states have call successors, (16), 8 states have call predecessors, (16), 9 states have return successors, (22), 16 states have call predecessors, (22), 15 states have call successors, (22) [2024-11-09 06:02:14,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 128 transitions. [2024-11-09 06:02:14,853 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 128 transitions. Word has length 84 [2024-11-09 06:02:14,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:02:14,854 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 128 transitions. [2024-11-09 06:02:14,854 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 41 states have internal predecessors, (69), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2024-11-09 06:02:14,854 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 128 transitions. [2024-11-09 06:02:14,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-09 06:02:14,855 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:02:14,855 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:02:14,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (130)] Ended with exit code 0 [2024-11-09 06:02:15,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2024-11-09 06:02:15,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (129)] Forceful destruction successful, exit code 0 [2024-11-09 06:02:15,456 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt,131 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 [2024-11-09 06:02:15,456 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:02:15,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:02:15,457 INFO L85 PathProgramCache]: Analyzing trace with hash -356616346, now seen corresponding path program 2 times [2024-11-09 06:02:15,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 06:02:15,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1634946466] [2024-11-09 06:02:15,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 06:02:15,458 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 [2024-11-09 06:02:15,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 06:02:15,459 INFO L229 MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 06:02:15,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (132)] Waiting until timeout for monitored process [2024-11-09 06:02:16,235 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 06:02:16,235 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:02:16,242 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-09 06:02:16,244 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:02:20,634 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-09 06:02:20,634 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:02:34,266 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-09 06:02:34,267 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 06:02:34,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1634946466] [2024-11-09 06:02:34,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1634946466] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:02:34,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1731227711] [2024-11-09 06:02:34,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 06:02:34,267 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 06:02:34,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 06:02:34,269 INFO L229 MonitoredProcess]: Starting monitored process 133 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 06:02:34,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (133)] Waiting until timeout for monitored process [2024-11-09 06:02:34,843 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 06:02:34,843 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:02:34,845 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-09 06:02:34,848 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:02:36,070 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-09 06:02:36,070 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:02:38,685 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-09 06:02:38,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1731227711] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:02:38,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478093824] [2024-11-09 06:02:38,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 06:02:38,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:02:38,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:02:38,687 INFO L229 MonitoredProcess]: Starting monitored process 134 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:02:38,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2024-11-09 06:02:39,587 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 06:02:39,587 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:02:39,590 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-09 06:02:39,592 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:02:40,632 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-09 06:02:40,632 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:02:43,353 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-09 06:02:43,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478093824] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:02:43,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 06:02:43,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 24, 23, 24, 23] total 45 [2024-11-09 06:02:43,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445928738] [2024-11-09 06:02:43,354 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 06:02:43,354 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-09 06:02:43,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 06:02:43,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-09 06:02:43,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1791, Unknown=0, NotChecked=0, Total=1980 [2024-11-09 06:02:43,356 INFO L87 Difference]: Start difference. First operand 105 states and 128 transitions. Second operand has 45 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 41 states have internal predecessors, (69), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2024-11-09 06:03:08,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:03:08,258 INFO L93 Difference]: Finished difference Result 113 states and 136 transitions. [2024-11-09 06:03:08,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-09 06:03:08,259 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 41 states have internal predecessors, (69), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) Word has length 84 [2024-11-09 06:03:08,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:03:08,260 INFO L225 Difference]: With dead ends: 113 [2024-11-09 06:03:08,260 INFO L226 Difference]: Without dead ends: 106 [2024-11-09 06:03:08,261 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 453 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 29.9s TimeCoverageRelationStatistics Valid=373, Invalid=3917, Unknown=0, NotChecked=0, Total=4290 [2024-11-09 06:03:08,262 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 45 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 1174 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1241 SdHoareTripleChecker+Invalid, 1217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2024-11-09 06:03:08,262 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 1241 Invalid, 1217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1174 Invalid, 0 Unknown, 0 Unchecked, 9.6s Time] [2024-11-09 06:03:08,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-09 06:03:08,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2024-11-09 06:03:08,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 77 states have (on average 1.1428571428571428) internal successors, (88), 79 states have internal predecessors, (88), 16 states have call successors, (16), 8 states have call predecessors, (16), 9 states have return successors, (21), 15 states have call predecessors, (21), 15 states have call successors, (21) [2024-11-09 06:03:08,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 125 transitions. [2024-11-09 06:03:08,307 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 125 transitions. Word has length 84 [2024-11-09 06:03:08,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:03:08,308 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 125 transitions. [2024-11-09 06:03:08,308 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 41 states have internal predecessors, (69), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2024-11-09 06:03:08,308 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 125 transitions. [2024-11-09 06:03:08,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-11-09 06:03:08,309 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:03:08,309 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:03:08,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (133)] Forceful destruction successful, exit code 0 [2024-11-09 06:03:08,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (132)] Forceful destruction successful, exit code 0 [2024-11-09 06:03:08,726 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2024-11-09 06:03:08,910 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt,132 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,134 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:03:08,910 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:03:08,911 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:03:08,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1080109810, now seen corresponding path program 1 times [2024-11-09 06:03:08,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 06:03:08,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [972582925] [2024-11-09 06:03:08,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:03:08,911 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 [2024-11-09 06:03:08,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 06:03:08,913 INFO L229 MonitoredProcess]: Starting monitored process 135 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 06:03:08,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (135)] Waiting until timeout for monitored process [2024-11-09 06:03:09,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:03:09,186 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-09 06:03:09,188 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:03:11,078 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-09 06:03:11,078 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:03:15,758 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-09 06:03:15,759 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 06:03:15,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [972582925] [2024-11-09 06:03:15,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [972582925] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:03:15,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1295477781] [2024-11-09 06:03:15,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:03:15,759 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 06:03:15,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 06:03:15,761 INFO L229 MonitoredProcess]: Starting monitored process 136 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 06:03:15,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (136)] Waiting until timeout for monitored process [2024-11-09 06:03:16,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:03:16,104 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-09 06:03:16,106 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:03:16,882 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-09 06:03:16,882 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:03:18,215 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-09 06:03:18,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1295477781] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:03:18,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343897427] [2024-11-09 06:03:18,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:03:18,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:03:18,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:03:18,217 INFO L229 MonitoredProcess]: Starting monitored process 137 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:03:18,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2024-11-09 06:03:18,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:03:18,520 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-09 06:03:18,521 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:03:20,422 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 06:03:20,422 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:03:24,316 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 17 proven. 13 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-09 06:03:24,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343897427] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:03:24,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 06:03:24,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17, 16, 20, 20] total 42 [2024-11-09 06:03:24,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82853466] [2024-11-09 06:03:24,317 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 06:03:24,317 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-09 06:03:24,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 06:03:24,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-09 06:03:24,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1519, Unknown=0, NotChecked=0, Total=1722 [2024-11-09 06:03:24,319 INFO L87 Difference]: Start difference. First operand 103 states and 125 transitions. Second operand has 42 states, 40 states have (on average 2.05) internal successors, (82), 42 states have internal predecessors, (82), 14 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (17), 12 states have call predecessors, (17), 13 states have call successors, (17) [2024-11-09 06:03:34,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:03:34,370 INFO L93 Difference]: Finished difference Result 144 states and 168 transitions. [2024-11-09 06:03:34,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-09 06:03:34,372 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 2.05) internal successors, (82), 42 states have internal predecessors, (82), 14 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (17), 12 states have call predecessors, (17), 13 states have call successors, (17) Word has length 85 [2024-11-09 06:03:34,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:03:34,373 INFO L225 Difference]: With dead ends: 144 [2024-11-09 06:03:34,373 INFO L226 Difference]: Without dead ends: 94 [2024-11-09 06:03:34,374 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 460 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=451, Invalid=3089, Unknown=0, NotChecked=0, Total=3540 [2024-11-09 06:03:34,374 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 46 mSDsluCounter, 1120 mSDsCounter, 0 mSdLazyCounter, 1097 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 1177 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:03:34,374 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 1177 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1097 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2024-11-09 06:03:34,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-09 06:03:34,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 87. [2024-11-09 06:03:34,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 67 states have internal predecessors, (74), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2024-11-09 06:03:34,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 103 transitions. [2024-11-09 06:03:34,397 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 103 transitions. Word has length 85 [2024-11-09 06:03:34,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:03:34,397 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 103 transitions. [2024-11-09 06:03:34,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 2.05) internal successors, (82), 42 states have internal predecessors, (82), 14 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (17), 12 states have call predecessors, (17), 13 states have call successors, (17) [2024-11-09 06:03:34,397 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 103 transitions. [2024-11-09 06:03:34,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-11-09 06:03:34,398 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:03:34,398 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:03:34,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (136)] Forceful destruction successful, exit code 0 [2024-11-09 06:03:34,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (135)] Forceful destruction successful, exit code 0 [2024-11-09 06:03:34,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2024-11-09 06:03:34,999 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt,135 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,137 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:03:34,999 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:03:34,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:03:35,000 INFO L85 PathProgramCache]: Analyzing trace with hash -967703310, now seen corresponding path program 2 times [2024-11-09 06:03:35,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 06:03:35,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1824865467] [2024-11-09 06:03:35,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 06:03:35,000 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 [2024-11-09 06:03:35,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 06:03:35,001 INFO L229 MonitoredProcess]: Starting monitored process 138 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 06:03:35,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (138)] Waiting until timeout for monitored process [2024-11-09 06:03:35,290 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 06:03:35,290 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:03:35,294 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-09 06:03:35,296 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:03:37,261 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-09 06:03:37,261 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:03:41,942 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-09 06:03:41,942 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 06:03:41,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1824865467] [2024-11-09 06:03:41,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1824865467] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:03:41,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [20140905] [2024-11-09 06:03:41,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 06:03:41,943 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 06:03:41,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 06:03:41,944 INFO L229 MonitoredProcess]: Starting monitored process 139 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 06:03:41,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (139)] Waiting until timeout for monitored process [2024-11-09 06:03:42,276 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 06:03:42,276 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:03:42,278 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-09 06:03:42,280 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:03:42,868 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-09 06:03:42,869 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:03:44,195 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-09 06:03:44,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [20140905] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:03:44,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131261459] [2024-11-09 06:03:44,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 06:03:44,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:03:44,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:03:44,198 INFO L229 MonitoredProcess]: Starting monitored process 140 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:03:44,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2024-11-09 06:03:44,504 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 06:03:44,505 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:03:44,507 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-09 06:03:44,509 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:03:45,318 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-09 06:03:45,318 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:03:46,619 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-09 06:03:46,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131261459] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:03:46,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 06:03:46,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17, 16, 16, 16] total 31 [2024-11-09 06:03:46,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481874501] [2024-11-09 06:03:46,620 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 06:03:46,621 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-09 06:03:46,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 06:03:46,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-09 06:03:46,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2024-11-09 06:03:46,622 INFO L87 Difference]: Start difference. First operand 87 states and 103 transitions. Second operand has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 11 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) [2024-11-09 06:03:51,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:03:51,847 INFO L93 Difference]: Finished difference Result 109 states and 126 transitions. [2024-11-09 06:03:51,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-09 06:03:51,849 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 11 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) Word has length 85 [2024-11-09 06:03:51,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:03:51,850 INFO L225 Difference]: With dead ends: 109 [2024-11-09 06:03:51,850 INFO L226 Difference]: Without dead ends: 74 [2024-11-09 06:03:51,850 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 475 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=253, Invalid=1387, Unknown=0, NotChecked=0, Total=1640 [2024-11-09 06:03:51,851 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 22 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:03:51,851 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 985 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-11-09 06:03:51,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-09 06:03:51,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2024-11-09 06:03:51,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 58 states have internal predecessors, (64), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) [2024-11-09 06:03:51,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2024-11-09 06:03:51,867 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 85 [2024-11-09 06:03:51,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:03:51,867 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2024-11-09 06:03:51,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 11 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) [2024-11-09 06:03:51,868 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2024-11-09 06:03:51,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-09 06:03:51,868 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:03:51,869 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:03:51,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2024-11-09 06:03:52,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (138)] Ended with exit code 0 [2024-11-09 06:03:52,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (139)] Ended with exit code 0 [2024-11-09 06:03:52,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,138 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,139 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt [2024-11-09 06:03:52,470 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:03:52,470 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:03:52,470 INFO L85 PathProgramCache]: Analyzing trace with hash 826266100, now seen corresponding path program 1 times [2024-11-09 06:03:52,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 06:03:52,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [619519177] [2024-11-09 06:03:52,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:03:52,471 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 [2024-11-09 06:03:52,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 06:03:52,472 INFO L229 MonitoredProcess]: Starting monitored process 141 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 06:03:52,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (141)] Waiting until timeout for monitored process [2024-11-09 06:03:52,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:03:52,774 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-09 06:03:52,778 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:03:57,470 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-09 06:03:57,470 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:04:13,754 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-09 06:04:13,755 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 06:04:13,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [619519177] [2024-11-09 06:04:13,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [619519177] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:04:13,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1889075322] [2024-11-09 06:04:13,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:13,755 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 06:04:13,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 06:04:13,757 INFO L229 MonitoredProcess]: Starting monitored process 142 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 06:04:13,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (142)] Waiting until timeout for monitored process [2024-11-09 06:04:14,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:14,110 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-09 06:04:14,113 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:04:28,119 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-09 06:04:28,119 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:04:50,660 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-09 06:04:50,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1889075322] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:04:50,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611154550] [2024-11-09 06:04:50,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:50,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:04:50,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:04:50,662 INFO L229 MonitoredProcess]: Starting monitored process 143 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:04:50,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2024-11-09 06:04:50,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:50,975 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-09 06:04:50,977 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:04:57,833 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-09 06:04:57,833 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:05:14,542 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-09 06:05:14,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611154550] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:05:14,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 06:05:14,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 26, 20, 25, 22, 31] total 93 [2024-11-09 06:05:14,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59714421] [2024-11-09 06:05:14,543 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 06:05:14,544 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2024-11-09 06:05:14,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 06:05:14,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2024-11-09 06:05:14,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=475, Invalid=8078, Unknown=3, NotChecked=0, Total=8556 [2024-11-09 06:05:14,546 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand has 93 states, 87 states have (on average 1.4252873563218391) internal successors, (124), 84 states have internal predecessors, (124), 22 states have call successors, (25), 2 states have call predecessors, (25), 11 states have return successors, (29), 24 states have call predecessors, (29), 21 states have call successors, (29) [2024-11-09 06:05:45,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:05:45,000 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2024-11-09 06:05:45,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-09 06:05:45,002 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 87 states have (on average 1.4252873563218391) internal successors, (124), 84 states have internal predecessors, (124), 22 states have call successors, (25), 2 states have call predecessors, (25), 11 states have return successors, (29), 24 states have call predecessors, (29), 21 states have call successors, (29) Word has length 86 [2024-11-09 06:05:45,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:05:45,003 INFO L225 Difference]: With dead ends: 90 [2024-11-09 06:05:45,003 INFO L226 Difference]: Without dead ends: 81 [2024-11-09 06:05:45,005 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 418 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3658 ImplicationChecksByTransitivity, 85.0s TimeCoverageRelationStatistics Valid=586, Invalid=10331, Unknown=3, NotChecked=0, Total=10920 [2024-11-09 06:05:45,005 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 25 mSDsluCounter, 1748 mSDsCounter, 0 mSdLazyCounter, 1509 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1789 SdHoareTripleChecker+Invalid, 1531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:05:45,006 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 1789 Invalid, 1531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1509 Invalid, 0 Unknown, 0 Unchecked, 12.4s Time] [2024-11-09 06:05:45,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-09 06:05:45,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2024-11-09 06:05:45,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 59 states have internal predecessors, (66), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2024-11-09 06:05:45,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 89 transitions. [2024-11-09 06:05:45,034 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 89 transitions. Word has length 86 [2024-11-09 06:05:45,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:05:45,035 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 89 transitions. [2024-11-09 06:05:45,035 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 87 states have (on average 1.4252873563218391) internal successors, (124), 84 states have internal predecessors, (124), 22 states have call successors, (25), 2 states have call predecessors, (25), 11 states have return successors, (29), 24 states have call predecessors, (29), 21 states have call successors, (29) [2024-11-09 06:05:45,035 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 89 transitions. [2024-11-09 06:05:45,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-09 06:05:45,036 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:05:45,036 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:05:45,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2024-11-09 06:05:45,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (142)] Forceful destruction successful, exit code 0 [2024-11-09 06:05:45,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (141)] Forceful destruction successful, exit code 0 [2024-11-09 06:05:45,637 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,142 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt,141 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 [2024-11-09 06:05:45,637 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:05:45,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:05:45,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1335739190, now seen corresponding path program 1 times [2024-11-09 06:05:45,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 06:05:45,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1343964656] [2024-11-09 06:05:45,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:05:45,639 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 [2024-11-09 06:05:45,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 06:05:45,640 INFO L229 MonitoredProcess]: Starting monitored process 144 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 06:05:45,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (144)] Waiting until timeout for monitored process [2024-11-09 06:05:46,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:05:46,347 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-09 06:05:46,350 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:05:51,168 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-09 06:05:51,168 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:06:07,059 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-09 06:06:07,059 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 06:06:07,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1343964656] [2024-11-09 06:06:07,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1343964656] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:06:07,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [771837444] [2024-11-09 06:06:07,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:06:07,060 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 06:06:07,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 06:06:07,061 INFO L229 MonitoredProcess]: Starting monitored process 145 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 06:06:07,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (145)] Waiting until timeout for monitored process [2024-11-09 06:06:07,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:06:07,666 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-09 06:06:07,668 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:06:10,680 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-09 06:06:10,681 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:06:27,569 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-09 06:06:27,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [771837444] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:06:27,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066889159] [2024-11-09 06:06:27,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:06:27,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:06:27,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:06:27,571 INFO L229 MonitoredProcess]: Starting monitored process 146 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:06:27,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2024-11-09 06:06:28,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:06:28,451 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-09 06:06:28,454 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:06:34,130 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 06:06:34,130 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:06:43,666 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-09 06:06:43,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066889159] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:06:43,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 06:06:43,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 26, 25, 28, 28] total 87 [2024-11-09 06:06:43,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414054241] [2024-11-09 06:06:43,667 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 06:06:43,667 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2024-11-09 06:06:43,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 06:06:43,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2024-11-09 06:06:43,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=7026, Unknown=0, NotChecked=0, Total=7482 [2024-11-09 06:06:43,670 INFO L87 Difference]: Start difference. First operand 76 states and 89 transitions. Second operand has 87 states, 82 states have (on average 1.451219512195122) internal successors, (119), 81 states have internal predecessors, (119), 22 states have call successors, (25), 2 states have call predecessors, (25), 10 states have return successors, (28), 22 states have call predecessors, (28), 21 states have call successors, (28) [2024-11-09 06:07:00,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:07:00,427 INFO L93 Difference]: Finished difference Result 83 states and 95 transitions. [2024-11-09 06:07:00,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-09 06:07:00,429 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 82 states have (on average 1.451219512195122) internal successors, (119), 81 states have internal predecessors, (119), 22 states have call successors, (25), 2 states have call predecessors, (25), 10 states have return successors, (28), 22 states have call predecessors, (28), 21 states have call successors, (28) Word has length 86 [2024-11-09 06:07:00,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:07:00,429 INFO L225 Difference]: With dead ends: 83 [2024-11-09 06:07:00,430 INFO L226 Difference]: Without dead ends: 72 [2024-11-09 06:07:00,431 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 424 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 48.7s TimeCoverageRelationStatistics Valid=531, Invalid=8211, Unknown=0, NotChecked=0, Total=8742 [2024-11-09 06:07:00,431 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 13 mSDsluCounter, 1806 mSDsCounter, 0 mSdLazyCounter, 1764 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 1851 SdHoareTripleChecker+Invalid, 1781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:07:00,431 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 1851 Invalid, 1781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1764 Invalid, 0 Unknown, 0 Unchecked, 12.5s Time] [2024-11-09 06:07:00,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-09 06:07:00,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2024-11-09 06:07:00,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 57 states have internal predecessors, (62), 10 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2024-11-09 06:07:00,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2024-11-09 06:07:00,458 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 86 [2024-11-09 06:07:00,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:07:00,459 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2024-11-09 06:07:00,459 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 82 states have (on average 1.451219512195122) internal successors, (119), 81 states have internal predecessors, (119), 22 states have call successors, (25), 2 states have call predecessors, (25), 10 states have return successors, (28), 22 states have call predecessors, (28), 21 states have call successors, (28) [2024-11-09 06:07:00,459 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2024-11-09 06:07:00,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-09 06:07:00,460 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:07:00,460 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:07:00,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (145)] Forceful destruction successful, exit code 0 [2024-11-09 06:07:00,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2024-11-09 06:07:00,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (144)] Forceful destruction successful, exit code 0 [2024-11-09 06:07:01,061 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt,146 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,144 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 [2024-11-09 06:07:01,061 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:07:01,062 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:07:01,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1992687704, now seen corresponding path program 1 times [2024-11-09 06:07:01,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 06:07:01,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1654851439] [2024-11-09 06:07:01,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:07:01,062 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 [2024-11-09 06:07:01,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 06:07:01,064 INFO L229 MonitoredProcess]: Starting monitored process 147 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 06:07:01,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761d93a1-af50-4f51-b370-564d8c51e43c/bin/utaipan-verify-YMUCfTKeje/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 (147)] Waiting until timeout for monitored process [2024-11-09 06:07:01,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:07:01,846 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-09 06:07:01,848 INFO L278 TraceCheckSpWp]: Computing forward predicates...