./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh --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 2e745a133311e60f1a9e202bf4fcb9b524a944d790f4c1df2987f4b8dfd5e08b --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 17:23:16,434 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 17:23:16,503 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 17:23:16,509 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 17:23:16,509 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 17:23:16,536 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 17:23:16,537 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 17:23:16,537 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 17:23:16,538 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 17:23:16,538 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 17:23:16,539 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 17:23:16,540 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 17:23:16,540 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 17:23:16,541 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 17:23:16,541 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 17:23:16,542 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 17:23:16,542 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 17:23:16,543 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 17:23:16,543 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 17:23:16,544 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 17:23:16,544 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 17:23:16,545 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 17:23:16,546 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 17:23:16,546 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 17:23:16,547 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 17:23:16,547 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 17:23:16,548 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 17:23:16,548 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 17:23:16,549 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 17:23:16,549 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 17:23:16,549 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 17:23:16,550 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 17:23:16,550 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 17:23:16,550 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 17:23:16,551 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 17:23:16,551 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 17:23:16,551 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 17:23:16,551 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:23:16,552 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 17:23:16,552 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 17:23:16,552 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 17:23:16,552 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 17:23:16,553 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 17:23:16,553 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 17:23:16,553 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 17:23:16,553 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 17:23:16,553 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 17:23:16,554 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_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e745a133311e60f1a9e202bf4fcb9b524a944d790f4c1df2987f4b8dfd5e08b [2023-12-02 17:23:16,774 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 17:23:16,795 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 17:23:16,798 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 17:23:16,799 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 17:23:16,800 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 17:23:16,801 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c [2023-12-02 17:23:19,524 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 17:23:19,693 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 17:23:19,694 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c [2023-12-02 17:23:19,704 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/data/8e8417272/b342e85c24334181b286891e4e25edb4/FLAG4fa4303f3 [2023-12-02 17:23:19,715 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/data/8e8417272/b342e85c24334181b286891e4e25edb4 [2023-12-02 17:23:19,717 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 17:23:19,718 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 17:23:19,719 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 17:23:19,719 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 17:23:19,724 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 17:23:19,725 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:23:19" (1/1) ... [2023-12-02 17:23:19,726 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b5c0c3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:23:19, skipping insertion in model container [2023-12-02 17:23:19,726 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:23:19" (1/1) ... [2023-12-02 17:23:19,756 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 17:23:19,886 WARN L240 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_289eb14d-2479-488e-a86f-e580d21ac04e/sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c[1995,2008] [2023-12-02 17:23:19,892 WARN L240 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_289eb14d-2479-488e-a86f-e580d21ac04e/sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c[2389,2402] [2023-12-02 17:23:19,932 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:23:19,942 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 17:23:19,955 WARN L240 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_289eb14d-2479-488e-a86f-e580d21ac04e/sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c[1995,2008] [2023-12-02 17:23:19,957 WARN L240 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_289eb14d-2479-488e-a86f-e580d21ac04e/sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c[2389,2402] [2023-12-02 17:23:19,987 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:23:20,002 INFO L206 MainTranslator]: Completed translation [2023-12-02 17:23:20,002 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:23:20 WrapperNode [2023-12-02 17:23:20,003 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 17:23:20,003 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 17:23:20,003 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 17:23:20,004 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 17:23:20,009 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:23:20" (1/1) ... [2023-12-02 17:23:20,018 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:23:20" (1/1) ... [2023-12-02 17:23:20,040 INFO L138 Inliner]: procedures = 27, calls = 19, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 79 [2023-12-02 17:23:20,041 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 17:23:20,041 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 17:23:20,041 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 17:23:20,042 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 17:23:20,049 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:23:20" (1/1) ... [2023-12-02 17:23:20,049 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:23:20" (1/1) ... [2023-12-02 17:23:20,051 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:23:20" (1/1) ... [2023-12-02 17:23:20,051 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:23:20" (1/1) ... [2023-12-02 17:23:20,057 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:23:20" (1/1) ... [2023-12-02 17:23:20,062 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:23:20" (1/1) ... [2023-12-02 17:23:20,064 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:23:20" (1/1) ... [2023-12-02 17:23:20,066 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:23:20" (1/1) ... [2023-12-02 17:23:20,068 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 17:23:20,069 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 17:23:20,069 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 17:23:20,069 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 17:23:20,070 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:23:20" (1/1) ... [2023-12-02 17:23:20,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:23:20,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:23:20,100 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 17:23:20,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 17:23:20,130 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 17:23:20,131 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-12-02 17:23:20,131 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-12-02 17:23:20,131 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2023-12-02 17:23:20,131 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2023-12-02 17:23:20,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 17:23:20,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 17:23:20,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 17:23:20,132 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 17:23:20,132 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 17:23:20,206 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 17:23:20,208 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 17:23:20,508 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 17:23:20,676 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 17:23:20,677 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-02 17:23:20,678 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:23:20 BoogieIcfgContainer [2023-12-02 17:23:20,679 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 17:23:20,681 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 17:23:20,682 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 17:23:20,684 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 17:23:20,685 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 05:23:19" (1/3) ... [2023-12-02 17:23:20,685 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bcb825d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:23:20, skipping insertion in model container [2023-12-02 17:23:20,685 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:23:20" (2/3) ... [2023-12-02 17:23:20,686 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bcb825d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:23:20, skipping insertion in model container [2023-12-02 17:23:20,686 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:23:20" (3/3) ... [2023-12-02 17:23:20,687 INFO L112 eAbstractionObserver]: Analyzing ICFG square_8+soft_float_4-2a.c.cil.c [2023-12-02 17:23:20,702 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 17:23:20,702 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-02 17:23:20,746 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 17:23:20,752 INFO L357 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, mHoare=true, 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;@32ae94eb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 17:23:20,752 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-02 17:23:20,757 INFO L276 IsEmpty]: Start isEmpty. Operand has 49 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 37 states have internal predecessors, (52), 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) [2023-12-02 17:23:20,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-12-02 17:23:20,762 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:23:20,763 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-12-02 17:23:20,763 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:23:20,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:23:20,768 INFO L85 PathProgramCache]: Analyzing trace with hash 9136577, now seen corresponding path program 1 times [2023-12-02 17:23:20,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:23:20,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919192592] [2023-12-02 17:23:20,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:23:20,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:23:20,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 17:23:20,852 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 17:23:20,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 17:23:20,877 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 17:23:20,879 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 17:23:20,880 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-12-02 17:23:20,882 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-12-02 17:23:20,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 17:23:20,887 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-12-02 17:23:20,890 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-12-02 17:23:20,907 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 05:23:20 BoogieIcfgContainer [2023-12-02 17:23:20,907 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-02 17:23:20,908 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 17:23:20,908 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 17:23:20,908 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 17:23:20,909 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:23:20" (3/4) ... [2023-12-02 17:23:20,911 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-12-02 17:23:20,912 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 17:23:20,914 INFO L158 Benchmark]: Toolchain (without parser) took 1195.26ms. Allocated memory was 140.5MB in the beginning and 169.9MB in the end (delta: 29.4MB). Free memory was 102.8MB in the beginning and 110.8MB in the end (delta: -8.0MB). Peak memory consumption was 23.8MB. Max. memory is 16.1GB. [2023-12-02 17:23:20,914 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 140.5MB. Free memory is still 87.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 17:23:20,915 INFO L158 Benchmark]: CACSL2BoogieTranslator took 283.90ms. Allocated memory is still 140.5MB. Free memory was 102.7MB in the beginning and 88.6MB in the end (delta: 14.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-12-02 17:23:20,915 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.48ms. Allocated memory is still 140.5MB. Free memory was 88.6MB in the beginning and 86.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 17:23:20,916 INFO L158 Benchmark]: Boogie Preprocessor took 26.99ms. Allocated memory is still 140.5MB. Free memory was 86.5MB in the beginning and 84.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 17:23:20,917 INFO L158 Benchmark]: RCFGBuilder took 609.79ms. Allocated memory was 140.5MB in the beginning and 169.9MB in the end (delta: 29.4MB). Free memory was 84.9MB in the beginning and 125.5MB in the end (delta: -40.5MB). Peak memory consumption was 28.0MB. Max. memory is 16.1GB. [2023-12-02 17:23:20,917 INFO L158 Benchmark]: TraceAbstraction took 225.58ms. Allocated memory is still 169.9MB. Free memory was 125.0MB in the beginning and 110.8MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-12-02 17:23:20,918 INFO L158 Benchmark]: Witness Printer took 4.72ms. Allocated memory is still 169.9MB. Free memory is still 110.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 17:23:20,921 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 140.5MB. Free memory is still 87.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 283.90ms. Allocated memory is still 140.5MB. Free memory was 102.7MB in the beginning and 88.6MB in the end (delta: 14.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.48ms. Allocated memory is still 140.5MB. Free memory was 88.6MB in the beginning and 86.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.99ms. Allocated memory is still 140.5MB. Free memory was 86.5MB in the beginning and 84.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 609.79ms. Allocated memory was 140.5MB in the beginning and 169.9MB in the end (delta: 29.4MB). Free memory was 84.9MB in the beginning and 125.5MB in the end (delta: -40.5MB). Peak memory consumption was 28.0MB. Max. memory is 16.1GB. * TraceAbstraction took 225.58ms. Allocated memory is still 169.9MB. Free memory was 125.0MB in the beginning and 110.8MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Witness Printer took 4.72ms. Allocated memory is still 169.9MB. Free memory is still 110.8MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 48]: 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 someBinaryFLOATComparisonOperation at line 47, overapproximation of someBinaryArithmeticFLOAToperation at line 45. Possible FailurePath: [L310] COND TRUE __VERIFIER_nondet_int() [L311] CALL main1() [L39] float IN = __VERIFIER_nondet_float(); [L40] CALL assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L34] COND FALSE !(!cond) [L40] RET assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L42] float x = IN; [L44-L45] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; VAL [IN=53, x=53] [L47] COND TRUE !(result >= 0.0f && result < 1.5f) VAL [IN=53, x=53] [L48] reach_error() VAL [IN=53, x=53] - UnprovableResult [Line: 61]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 49 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 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: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-12-02 17:23:20,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/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-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh --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 2e745a133311e60f1a9e202bf4fcb9b524a944d790f4c1df2987f4b8dfd5e08b --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 17:23:22,907 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 17:23:22,985 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2023-12-02 17:23:22,991 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 17:23:22,992 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 17:23:23,020 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 17:23:23,020 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 17:23:23,021 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 17:23:23,022 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 17:23:23,022 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 17:23:23,023 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 17:23:23,023 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 17:23:23,024 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 17:23:23,024 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 17:23:23,025 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 17:23:23,026 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 17:23:23,027 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 17:23:23,027 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 17:23:23,028 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 17:23:23,028 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 17:23:23,029 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 17:23:23,029 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 17:23:23,030 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 17:23:23,030 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 17:23:23,031 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 17:23:23,031 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-02 17:23:23,031 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-02 17:23:23,032 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 17:23:23,032 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 17:23:23,033 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 17:23:23,033 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 17:23:23,034 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-02 17:23:23,034 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 17:23:23,035 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 17:23:23,035 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:23:23,036 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 17:23:23,036 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 17:23:23,036 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 17:23:23,037 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-12-02 17:23:23,037 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-02 17:23:23,037 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 17:23:23,037 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 17:23:23,038 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 17:23:23,038 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 17:23:23,038 INFO L153 SettingsManager]: * Logic for external solver=AUFBV 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_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e745a133311e60f1a9e202bf4fcb9b524a944d790f4c1df2987f4b8dfd5e08b [2023-12-02 17:23:23,341 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 17:23:23,360 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 17:23:23,362 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 17:23:23,363 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 17:23:23,364 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 17:23:23,365 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c [2023-12-02 17:23:26,121 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 17:23:26,348 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 17:23:26,349 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c [2023-12-02 17:23:26,360 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/data/d6f2510eb/5751a174e4394e738276a8735abe7650/FLAG749a4dab4 [2023-12-02 17:23:26,374 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/data/d6f2510eb/5751a174e4394e738276a8735abe7650 [2023-12-02 17:23:26,376 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 17:23:26,378 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 17:23:26,379 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 17:23:26,379 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 17:23:26,384 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 17:23:26,385 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:23:26" (1/1) ... [2023-12-02 17:23:26,386 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25d76cdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:23:26, skipping insertion in model container [2023-12-02 17:23:26,387 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:23:26" (1/1) ... [2023-12-02 17:23:26,420 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 17:23:26,574 WARN L240 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_289eb14d-2479-488e-a86f-e580d21ac04e/sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c[1995,2008] [2023-12-02 17:23:26,582 WARN L240 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_289eb14d-2479-488e-a86f-e580d21ac04e/sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c[2389,2402] [2023-12-02 17:23:26,625 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:23:26,642 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 17:23:26,661 WARN L240 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_289eb14d-2479-488e-a86f-e580d21ac04e/sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c[1995,2008] [2023-12-02 17:23:26,663 WARN L240 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_289eb14d-2479-488e-a86f-e580d21ac04e/sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c[2389,2402] [2023-12-02 17:23:26,696 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:23:26,716 INFO L206 MainTranslator]: Completed translation [2023-12-02 17:23:26,716 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:23:26 WrapperNode [2023-12-02 17:23:26,716 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 17:23:26,718 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 17:23:26,718 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 17:23:26,718 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 17:23:26,727 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:23:26" (1/1) ... [2023-12-02 17:23:26,741 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:23:26" (1/1) ... [2023-12-02 17:23:26,766 INFO L138 Inliner]: procedures = 28, calls = 19, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 75 [2023-12-02 17:23:26,766 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 17:23:26,767 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 17:23:26,768 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 17:23:26,768 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 17:23:26,779 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:23:26" (1/1) ... [2023-12-02 17:23:26,779 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:23:26" (1/1) ... [2023-12-02 17:23:26,784 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:23:26" (1/1) ... [2023-12-02 17:23:26,785 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:23:26" (1/1) ... [2023-12-02 17:23:26,797 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:23:26" (1/1) ... [2023-12-02 17:23:26,802 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:23:26" (1/1) ... [2023-12-02 17:23:26,805 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:23:26" (1/1) ... [2023-12-02 17:23:26,807 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:23:26" (1/1) ... [2023-12-02 17:23:26,812 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 17:23:26,813 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 17:23:26,813 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 17:23:26,813 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 17:23:26,814 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:23:26" (1/1) ... [2023-12-02 17:23:26,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:23:26,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:23:26,848 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 17:23:26,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 17:23:26,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 17:23:26,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-12-02 17:23:26,887 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-12-02 17:23:26,888 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-12-02 17:23:26,888 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2023-12-02 17:23:26,888 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2023-12-02 17:23:26,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 17:23:26,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 17:23:26,889 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 17:23:26,889 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 17:23:26,989 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 17:23:26,992 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 17:23:29,449 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 17:23:29,479 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 17:23:29,480 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-02 17:23:29,480 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:23:29 BoogieIcfgContainer [2023-12-02 17:23:29,480 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 17:23:29,483 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 17:23:29,483 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 17:23:29,486 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 17:23:29,486 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 05:23:26" (1/3) ... [2023-12-02 17:23:29,487 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57da1b01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:23:29, skipping insertion in model container [2023-12-02 17:23:29,487 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:23:26" (2/3) ... [2023-12-02 17:23:29,488 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57da1b01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:23:29, skipping insertion in model container [2023-12-02 17:23:29,488 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:23:29" (3/3) ... [2023-12-02 17:23:29,489 INFO L112 eAbstractionObserver]: Analyzing ICFG square_8+soft_float_4-2a.c.cil.c [2023-12-02 17:23:29,507 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 17:23:29,507 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-02 17:23:29,554 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 17:23:29,563 INFO L357 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, mHoare=true, 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;@51438b2e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 17:23:29,563 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-02 17:23:29,569 INFO L276 IsEmpty]: Start isEmpty. Operand has 57 states, 43 states have (on average 1.558139534883721) internal successors, (67), 45 states have internal predecessors, (67), 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) [2023-12-02 17:23:29,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 17:23:29,578 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:23:29,578 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-02 17:23:29,579 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:23:29,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:23:29,586 INFO L85 PathProgramCache]: Analyzing trace with hash 2097064236, now seen corresponding path program 1 times [2023-12-02 17:23:29,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:23:29,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1023424677] [2023-12-02 17:23:29,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:23:29,600 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 [2023-12-02 17:23:29,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:23:29,601 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 17:23:29,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 17:23:30,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:23:30,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-02 17:23:30,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:23:30,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:23:30,116 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:23:30,117 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:23:30,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1023424677] [2023-12-02 17:23:30,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1023424677] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:23:30,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:23:30,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 17:23:30,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053703518] [2023-12-02 17:23:30,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:23:30,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 17:23:30,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:23:30,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 17:23:30,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 17:23:30,152 INFO L87 Difference]: Start difference. First operand has 57 states, 43 states have (on average 1.558139534883721) internal successors, (67), 45 states have internal predecessors, (67), 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 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:23:30,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:23:30,201 INFO L93 Difference]: Finished difference Result 110 states and 167 transitions. [2023-12-02 17:23:30,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 17:23:30,204 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-12-02 17:23:30,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:23:30,214 INFO L225 Difference]: With dead ends: 110 [2023-12-02 17:23:30,214 INFO L226 Difference]: Without dead ends: 53 [2023-12-02 17:23:30,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 17:23:30,223 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:23:30,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 69 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:23:30,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-12-02 17:23:30,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-12-02 17:23:30,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 40 states have (on average 1.375) internal successors, (55), 42 states have internal predecessors, (55), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 17:23:30,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 70 transitions. [2023-12-02 17:23:30,274 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 70 transitions. Word has length 6 [2023-12-02 17:23:30,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:23:30,275 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 70 transitions. [2023-12-02 17:23:30,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:23:30,275 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 70 transitions. [2023-12-02 17:23:30,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 17:23:30,276 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:23:30,277 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-02 17:23:30,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Forceful destruction successful, exit code 0 [2023-12-02 17:23:30,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:23:30,480 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:23:30,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:23:30,481 INFO L85 PathProgramCache]: Analyzing trace with hash 2097123818, now seen corresponding path program 1 times [2023-12-02 17:23:30,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:23:30,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [567782412] [2023-12-02 17:23:30,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:23:30,482 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 [2023-12-02 17:23:30,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:23:30,483 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 17:23:30,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 17:23:45,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:23:45,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 17:23:45,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:24:00,232 WARN L854 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0) (= (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) |c_ULTIMATE.start_main1_~result~0#1|) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2023-12-02 17:24:34,057 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0))) (.cse2 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0))) (.cse3 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0))) (.cse4 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0))) (.cse0 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (or (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (and (not (fp.lt (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) ((_ to_fp 8 24) roundNearestTiesToEven (/ 3.0 2.0)))) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0))) (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (and (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (not (fp.geq (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (_ +zero 8 24))) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0))))) is different from false [2023-12-02 17:24:36,104 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0))) (.cse2 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0))) (.cse3 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0))) (.cse4 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0))) (.cse0 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (or (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (and (not (fp.lt (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) ((_ to_fp 8 24) roundNearestTiesToEven (/ 3.0 2.0)))) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0))) (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (and (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (not (fp.geq (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (_ +zero 8 24))) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0))))) is different from true [2023-12-02 17:24:36,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:24:36,105 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:24:36,105 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:24:36,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [567782412] [2023-12-02 17:24:36,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [567782412] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:24:36,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:24:36,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 17:24:36,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599080885] [2023-12-02 17:24:36,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:24:36,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 17:24:36,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:24:36,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 17:24:36,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=12, Unknown=3, NotChecked=14, Total=42 [2023-12-02 17:24:36,109 INFO L87 Difference]: Start difference. First operand 53 states and 70 transitions. Second operand has 7 states, 6 states have (on average 1.0) internal successors, (6), 6 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:24:38,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.30s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 17:24:40,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 17:24:42,703 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (and (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0) (= (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) |c_ULTIMATE.start_main1_~result~0#1|) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)))) (fp.lt |c_ULTIMATE.start_main1_~IN~0#1| .cse0) (fp.geq |c_ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (= c_currentRoundingMode roundNearestTiesToEven))) is different from false [2023-12-02 17:24:43,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:24:43,000 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2023-12-02 17:24:43,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 17:24:43,001 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.0) internal successors, (6), 6 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-12-02 17:24:43,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:24:43,003 INFO L225 Difference]: With dead ends: 53 [2023-12-02 17:24:43,004 INFO L226 Difference]: Without dead ends: 48 [2023-12-02 17:24:43,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=20, Invalid=18, Unknown=4, NotChecked=30, Total=72 [2023-12-02 17:24:43,006 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 66 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-12-02 17:24:43,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 156 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 2 Unknown, 140 Unchecked, 4.6s Time] [2023-12-02 17:24:43,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-12-02 17:24:43,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2023-12-02 17:24:43,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 37 states have internal predecessors, (50), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 17:24:43,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2023-12-02 17:24:43,018 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 6 [2023-12-02 17:24:43,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:24:43,019 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2023-12-02 17:24:43,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.0) internal successors, (6), 6 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:24:43,019 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2023-12-02 17:24:43,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 17:24:43,021 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:24:43,021 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:24:43,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 17:24:43,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:24:43,222 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:24:43,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:24:43,223 INFO L85 PathProgramCache]: Analyzing trace with hash -845175173, now seen corresponding path program 1 times [2023-12-02 17:24:43,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:24:43,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [119690094] [2023-12-02 17:24:43,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:24:43,224 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 [2023-12-02 17:24:43,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:24:43,225 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 17:24:43,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-12-02 17:24:43,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:24:43,301 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 17:24:43,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:24:43,718 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 17:24:43,718 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:24:43,718 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:24:43,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [119690094] [2023-12-02 17:24:43,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [119690094] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:24:43,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:24:43,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 17:24:43,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91284508] [2023-12-02 17:24:43,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:24:43,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 17:24:43,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:24:43,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 17:24:43,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 17:24:43,722 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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) [2023-12-02 17:24:44,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:24:44,256 INFO L93 Difference]: Finished difference Result 93 states and 128 transitions. [2023-12-02 17:24:44,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 17:24:44,257 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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 28 [2023-12-02 17:24:44,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:24:44,260 INFO L225 Difference]: With dead ends: 93 [2023-12-02 17:24:44,260 INFO L226 Difference]: Without dead ends: 66 [2023-12-02 17:24:44,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-12-02 17:24:44,263 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 16 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:24:44,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 391 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 17:24:44,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-12-02 17:24:44,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2023-12-02 17:24:44,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 44 states have internal predecessors, (56), 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) [2023-12-02 17:24:44,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 76 transitions. [2023-12-02 17:24:44,279 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 76 transitions. Word has length 28 [2023-12-02 17:24:44,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:24:44,280 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 76 transitions. [2023-12-02 17:24:44,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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) [2023-12-02 17:24:44,280 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 76 transitions. [2023-12-02 17:24:44,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 17:24:44,282 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:24:44,282 INFO L195 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, 1, 1] [2023-12-02 17:24:44,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-12-02 17:24:44,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:24:44,484 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:24:44,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:24:44,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1744997158, now seen corresponding path program 1 times [2023-12-02 17:24:44,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:24:44,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1300128985] [2023-12-02 17:24:44,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:24:44,485 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 [2023-12-02 17:24:44,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:24:44,486 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 17:24:44,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-12-02 17:24:44,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:24:44,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 17:24:44,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:24:45,035 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 17:24:45,035 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:24:45,255 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 17:24:45,255 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:24:45,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1300128985] [2023-12-02 17:24:45,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1300128985] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:24:45,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1465330771] [2023-12-02 17:24:45,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:24:45,256 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:24:45,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:24:45,258 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:24:45,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2023-12-02 17:24:45,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:24:45,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 17:24:45,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:24:45,438 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 17:24:45,438 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:24:45,672 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 17:24:45,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1465330771] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:24:45,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073461980] [2023-12-02 17:24:45,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:24:45,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:24:45,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:24:45,675 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:24:45,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 17:24:45,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:24:45,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 17:24:45,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:24:45,844 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 17:24:45,844 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:24:46,064 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 17:24:46,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073461980] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:24:46,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:24:46,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 9 [2023-12-02 17:24:46,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380100685] [2023-12-02 17:24:46,066 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:24:46,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 17:24:46,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:24:46,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 17:24:46,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-02 17:24:46,069 INFO L87 Difference]: Start difference. First operand 57 states and 76 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 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) [2023-12-02 17:24:46,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:24:46,809 INFO L93 Difference]: Finished difference Result 112 states and 150 transitions. [2023-12-02 17:24:46,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 17:24:46,810 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 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 32 [2023-12-02 17:24:46,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:24:46,812 INFO L225 Difference]: With dead ends: 112 [2023-12-02 17:24:46,812 INFO L226 Difference]: Without dead ends: 85 [2023-12-02 17:24:46,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-12-02 17:24:46,815 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 21 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 17:24:46,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 445 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 17:24:46,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-12-02 17:24:46,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 66. [2023-12-02 17:24:46,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 48 states have (on average 1.3125) internal successors, (63), 50 states have internal predecessors, (63), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2023-12-02 17:24:46,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 88 transitions. [2023-12-02 17:24:46,835 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 88 transitions. Word has length 32 [2023-12-02 17:24:46,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:24:46,836 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 88 transitions. [2023-12-02 17:24:46,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 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) [2023-12-02 17:24:46,836 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 88 transitions. [2023-12-02 17:24:46,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-02 17:24:46,838 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:24:46,838 INFO L195 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] [2023-12-02 17:24:46,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-12-02 17:24:47,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-02 17:24:47,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2023-12-02 17:24:47,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 17:24:47,442 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:24:47,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:24:47,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1333193720, now seen corresponding path program 1 times [2023-12-02 17:24:47,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:24:47,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1480617767] [2023-12-02 17:24:47,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:24:47,443 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 [2023-12-02 17:24:47,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:24:47,444 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 17:24:47,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-12-02 17:24:47,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:24:47,494 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 17:24:47,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:24:47,906 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 17:24:47,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:24:48,117 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 17:24:48,117 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:24:48,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1480617767] [2023-12-02 17:24:48,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1480617767] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:24:48,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1793726965] [2023-12-02 17:24:48,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:24:48,118 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:24:48,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:24:48,119 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:24:48,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2023-12-02 17:24:48,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:24:48,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 17:24:48,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:24:48,698 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 17:24:48,698 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:24:48,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1793726965] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:24:48,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:24:48,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 8] total 12 [2023-12-02 17:24:48,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759140863] [2023-12-02 17:24:48,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:24:48,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 17:24:48,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:24:48,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 17:24:48,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2023-12-02 17:24:48,700 INFO L87 Difference]: Start difference. First operand 66 states and 88 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 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) [2023-12-02 17:24:49,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:24:49,692 INFO L93 Difference]: Finished difference Result 105 states and 139 transitions. [2023-12-02 17:24:49,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 17:24:49,693 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 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 35 [2023-12-02 17:24:49,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:24:49,695 INFO L225 Difference]: With dead ends: 105 [2023-12-02 17:24:49,695 INFO L226 Difference]: Without dead ends: 83 [2023-12-02 17:24:49,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2023-12-02 17:24:49,697 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 16 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 17:24:49,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 455 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 17:24:49,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-12-02 17:24:49,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 73. [2023-12-02 17:24:49,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 55 states have internal predecessors, (69), 12 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2023-12-02 17:24:49,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 96 transitions. [2023-12-02 17:24:49,712 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 96 transitions. Word has length 35 [2023-12-02 17:24:49,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:24:49,713 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 96 transitions. [2023-12-02 17:24:49,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 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) [2023-12-02 17:24:49,713 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 96 transitions. [2023-12-02 17:24:49,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-02 17:24:49,716 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:24:49,716 INFO L195 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, 1, 1] [2023-12-02 17:24:49,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-12-02 17:24:49,921 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2023-12-02 17:24:50,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 17:24:50,120 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:24:50,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:24:50,121 INFO L85 PathProgramCache]: Analyzing trace with hash 904266001, now seen corresponding path program 2 times [2023-12-02 17:24:50,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:24:50,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [655574767] [2023-12-02 17:24:50,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:24:50,121 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 [2023-12-02 17:24:50,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:24:50,122 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 17:24:50,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-12-02 17:24:50,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-12-02 17:24:50,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:24:50,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 17:24:50,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:24:50,562 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 17:24:50,562 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:24:50,562 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:24:50,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [655574767] [2023-12-02 17:24:50,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [655574767] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:24:50,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:24:50,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 17:24:50,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683190502] [2023-12-02 17:24:50,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:24:50,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 17:24:50,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:24:50,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 17:24:50,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:24:50,564 INFO L87 Difference]: Start difference. First operand 73 states and 96 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) [2023-12-02 17:24:53,857 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] [2023-12-02 17:24:55,880 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] [2023-12-02 17:24:55,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:24:55,981 INFO L93 Difference]: Finished difference Result 100 states and 131 transitions. [2023-12-02 17:24:55,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 17:24:55,982 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 36 [2023-12-02 17:24:55,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:24:55,984 INFO L225 Difference]: With dead ends: 100 [2023-12-02 17:24:55,984 INFO L226 Difference]: Without dead ends: 98 [2023-12-02 17:24:55,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-02 17:24:55,986 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 27 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:24:55,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 291 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 2 Unknown, 0 Unchecked, 5.2s Time] [2023-12-02 17:24:55,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-12-02 17:24:56,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 79. [2023-12-02 17:24:56,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 57 states have (on average 1.2982456140350878) internal successors, (74), 60 states have internal predecessors, (74), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (16), 11 states have call predecessors, (16), 12 states have call successors, (16) [2023-12-02 17:24:56,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 103 transitions. [2023-12-02 17:24:56,003 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 103 transitions. Word has length 36 [2023-12-02 17:24:56,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:24:56,003 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 103 transitions. [2023-12-02 17:24:56,003 INFO L496 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) [2023-12-02 17:24:56,003 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 103 transitions. [2023-12-02 17:24:56,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-02 17:24:56,006 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:24:56,006 INFO L195 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, 1, 1] [2023-12-02 17:24:56,010 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2023-12-02 17:24:56,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:24:56,207 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:24:56,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:24:56,207 INFO L85 PathProgramCache]: Analyzing trace with hash 961524303, now seen corresponding path program 1 times [2023-12-02 17:24:56,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:24:56,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1273688403] [2023-12-02 17:24:56,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:24:56,208 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:24:56,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:24:56,209 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 17:24:56,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-12-02 17:24:56,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:24:56,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 17:24:56,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:24:56,619 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 17:24:56,620 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:24:56,620 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:24:56,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1273688403] [2023-12-02 17:24:56,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1273688403] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:24:56,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:24:56,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 17:24:56,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738867114] [2023-12-02 17:24:56,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:24:56,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 17:24:56,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:24:56,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 17:24:56,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:24:56,622 INFO L87 Difference]: Start difference. First operand 79 states and 103 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) [2023-12-02 17:24:59,130 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] [2023-12-02 17:24:59,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:24:59,216 INFO L93 Difference]: Finished difference Result 85 states and 108 transitions. [2023-12-02 17:24:59,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 17:24:59,216 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 36 [2023-12-02 17:24:59,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:24:59,218 INFO L225 Difference]: With dead ends: 85 [2023-12-02 17:24:59,218 INFO L226 Difference]: Without dead ends: 83 [2023-12-02 17:24:59,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-02 17:24:59,220 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 18 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:24:59,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 268 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2023-12-02 17:24:59,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-12-02 17:24:59,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 77. [2023-12-02 17:24:59,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 58 states have internal predecessors, (72), 12 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2023-12-02 17:24:59,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 99 transitions. [2023-12-02 17:24:59,239 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 99 transitions. Word has length 36 [2023-12-02 17:24:59,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:24:59,240 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 99 transitions. [2023-12-02 17:24:59,240 INFO L496 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) [2023-12-02 17:24:59,240 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 99 transitions. [2023-12-02 17:24:59,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-02 17:24:59,242 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:24:59,242 INFO L195 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] [2023-12-02 17:24:59,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2023-12-02 17:24:59,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:24:59,443 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:24:59,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:24:59,443 INFO L85 PathProgramCache]: Analyzing trace with hash -835722609, now seen corresponding path program 1 times [2023-12-02 17:24:59,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:24:59,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [614371961] [2023-12-02 17:24:59,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:24:59,444 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 [2023-12-02 17:24:59,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:24:59,445 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 17:24:59,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 17:24:59,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:24:59,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 17:24:59,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:24:59,948 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 17:24:59,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:25:00,403 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 17:25:00,404 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:25:00,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [614371961] [2023-12-02 17:25:00,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [614371961] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:25:00,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1506718723] [2023-12-02 17:25:00,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:25:00,405 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:25:00,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:25:00,406 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:25:00,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2023-12-02 17:25:00,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:25:00,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 17:25:00,471 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:25:00,597 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 17:25:00,597 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:25:00,930 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 17:25:00,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1506718723] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:25:00,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024832251] [2023-12-02 17:25:00,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:25:00,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:25:00,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:25:00,933 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:25:00,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 17:25:00,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:25:00,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 17:25:00,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:25:01,122 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 17:25:01,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:25:01,444 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 17:25:01,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024832251] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:25:01,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:25:01,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 9 [2023-12-02 17:25:01,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943141095] [2023-12-02 17:25:01,452 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:25:01,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 17:25:01,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:25:01,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 17:25:01,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-12-02 17:25:01,454 INFO L87 Difference]: Start difference. First operand 77 states and 99 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 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) [2023-12-02 17:25:02,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:25:02,252 INFO L93 Difference]: Finished difference Result 119 states and 158 transitions. [2023-12-02 17:25:02,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 17:25:02,253 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 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 39 [2023-12-02 17:25:02,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:25:02,255 INFO L225 Difference]: With dead ends: 119 [2023-12-02 17:25:02,255 INFO L226 Difference]: Without dead ends: 108 [2023-12-02 17:25:02,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-12-02 17:25:02,257 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 44 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 17:25:02,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 432 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 17:25:02,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-12-02 17:25:02,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 89. [2023-12-02 17:25:02,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 63 states have (on average 1.2698412698412698) internal successors, (80), 67 states have internal predecessors, (80), 15 states have call successors, (15), 7 states have call predecessors, (15), 10 states have return successors, (21), 14 states have call predecessors, (21), 14 states have call successors, (21) [2023-12-02 17:25:02,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 116 transitions. [2023-12-02 17:25:02,270 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 116 transitions. Word has length 39 [2023-12-02 17:25:02,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:25:02,270 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 116 transitions. [2023-12-02 17:25:02,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 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) [2023-12-02 17:25:02,270 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 116 transitions. [2023-12-02 17:25:02,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-02 17:25:02,272 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:25:02,272 INFO L195 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] [2023-12-02 17:25:02,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 17:25:02,475 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-12-02 17:25:02,674 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2023-12-02 17:25:02,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 17:25:02,873 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:25:02,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:25:02,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1228749619, now seen corresponding path program 1 times [2023-12-02 17:25:02,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:25:02,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2023098322] [2023-12-02 17:25:02,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:25:02,874 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 [2023-12-02 17:25:02,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:25:02,875 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 17:25:02,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-12-02 17:25:02,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:25:02,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 17:25:02,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:25:03,688 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 17:25:03,688 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:25:03,689 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:25:03,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2023098322] [2023-12-02 17:25:03,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2023098322] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:25:03,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:25:03,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-12-02 17:25:03,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865698406] [2023-12-02 17:25:03,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:25:03,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 17:25:03,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:25:03,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 17:25:03,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-12-02 17:25:03,691 INFO L87 Difference]: Start difference. First operand 89 states and 116 transitions. Second operand has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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) [2023-12-02 17:25:05,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:25:05,055 INFO L93 Difference]: Finished difference Result 122 states and 159 transitions. [2023-12-02 17:25:05,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 17:25:05,056 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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 39 [2023-12-02 17:25:05,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:25:05,057 INFO L225 Difference]: With dead ends: 122 [2023-12-02 17:25:05,057 INFO L226 Difference]: Without dead ends: 115 [2023-12-02 17:25:05,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-12-02 17:25:05,059 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 31 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:25:05,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 509 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 17:25:05,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-12-02 17:25:05,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 91. [2023-12-02 17:25:05,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 68 states have internal predecessors, (82), 15 states have call successors, (15), 7 states have call predecessors, (15), 10 states have return successors, (21), 15 states have call predecessors, (21), 14 states have call successors, (21) [2023-12-02 17:25:05,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 118 transitions. [2023-12-02 17:25:05,076 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 118 transitions. Word has length 39 [2023-12-02 17:25:05,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:25:05,077 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 118 transitions. [2023-12-02 17:25:05,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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) [2023-12-02 17:25:05,077 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 118 transitions. [2023-12-02 17:25:05,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-02 17:25:05,078 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:25:05,078 INFO L195 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] [2023-12-02 17:25:05,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-12-02 17:25:05,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:25:05,279 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:25:05,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:25:05,279 INFO L85 PathProgramCache]: Analyzing trace with hash -159748461, now seen corresponding path program 1 times [2023-12-02 17:25:05,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:25:05,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [139524005] [2023-12-02 17:25:05,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:25:05,280 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 [2023-12-02 17:25:05,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:25:05,280 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 17:25:05,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Waiting until timeout for monitored process [2023-12-02 17:25:05,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:25:05,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 17:25:05,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:25:06,064 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 17:25:06,064 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:25:06,979 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 17:25:06,979 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:25:06,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [139524005] [2023-12-02 17:25:06,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [139524005] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:25:06,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1498438216] [2023-12-02 17:25:06,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:25:06,980 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:25:06,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:25:06,981 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:25:06,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2023-12-02 17:25:07,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:25:07,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 17:25:07,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:25:07,796 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 17:25:07,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:25:08,927 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 17:25:08,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1498438216] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:25:08,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291893008] [2023-12-02 17:25:08,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:25:08,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:25:08,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:25:08,929 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:25:08,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-02 17:25:08,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:25:08,981 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 17:25:08,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:25:09,149 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 17:25:09,150 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:25:09,683 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 17:25:09,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291893008] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:25:09,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:25:09,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10, 10, 11, 11] total 21 [2023-12-02 17:25:09,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245687262] [2023-12-02 17:25:09,684 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:25:09,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-02 17:25:09,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:25:09,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-02 17:25:09,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2023-12-02 17:25:09,686 INFO L87 Difference]: Start difference. First operand 91 states and 118 transitions. Second operand has 21 states, 16 states have (on average 2.5625) internal successors, (41), 17 states have internal predecessors, (41), 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) [2023-12-02 17:25:12,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:25:12,910 INFO L93 Difference]: Finished difference Result 163 states and 215 transitions. [2023-12-02 17:25:12,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 17:25:12,911 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 2.5625) internal successors, (41), 17 states have internal predecessors, (41), 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 41 [2023-12-02 17:25:12,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:25:12,912 INFO L225 Difference]: With dead ends: 163 [2023-12-02 17:25:12,912 INFO L226 Difference]: Without dead ends: 136 [2023-12-02 17:25:12,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2023-12-02 17:25:12,915 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 101 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 897 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-12-02 17:25:12,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 897 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-12-02 17:25:12,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-12-02 17:25:12,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 113. [2023-12-02 17:25:12,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 82 states have (on average 1.2317073170731707) internal successors, (101), 84 states have internal predecessors, (101), 18 states have call successors, (18), 9 states have call predecessors, (18), 12 states have return successors, (29), 19 states have call predecessors, (29), 17 states have call successors, (29) [2023-12-02 17:25:12,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 148 transitions. [2023-12-02 17:25:12,931 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 148 transitions. Word has length 41 [2023-12-02 17:25:12,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:25:12,931 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 148 transitions. [2023-12-02 17:25:12,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 2.5625) internal successors, (41), 17 states have internal predecessors, (41), 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) [2023-12-02 17:25:12,931 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 148 transitions. [2023-12-02 17:25:12,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-02 17:25:12,933 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:25:12,933 INFO L195 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] [2023-12-02 17:25:12,938 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-02 17:25:13,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Forceful destruction successful, exit code 0 [2023-12-02 17:25:13,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2023-12-02 17:25:13,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 17:25:13,534 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:25:13,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:25:13,534 INFO L85 PathProgramCache]: Analyzing trace with hash -102490159, now seen corresponding path program 1 times [2023-12-02 17:25:13,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:25:13,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1807359443] [2023-12-02 17:25:13,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:25:13,535 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 [2023-12-02 17:25:13,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:25:13,535 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 17:25:13,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 17:25:13,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:25:13,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 17:25:13,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:25:13,786 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:25:13,786 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:25:13,786 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:25:13,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1807359443] [2023-12-02 17:25:13,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1807359443] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:25:13,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:25:13,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 17:25:13,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620411067] [2023-12-02 17:25:13,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:25:13,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 17:25:13,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:25:13,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 17:25:13,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:25:13,789 INFO L87 Difference]: Start difference. First operand 113 states and 148 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, (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) [2023-12-02 17:25:14,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:25:14,092 INFO L93 Difference]: Finished difference Result 121 states and 155 transitions. [2023-12-02 17:25:14,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 17:25:14,092 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, (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 41 [2023-12-02 17:25:14,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:25:14,094 INFO L225 Difference]: With dead ends: 121 [2023-12-02 17:25:14,094 INFO L226 Difference]: Without dead ends: 101 [2023-12-02 17:25:14,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-02 17:25:14,096 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 6 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:25:14,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 287 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:25:14,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-12-02 17:25:14,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2023-12-02 17:25:14,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 73 states have (on average 1.2191780821917808) internal successors, (89), 76 states have internal predecessors, (89), 16 states have call successors, (16), 8 states have call predecessors, (16), 11 states have return successors, (25), 16 states have call predecessors, (25), 15 states have call successors, (25) [2023-12-02 17:25:14,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 130 transitions. [2023-12-02 17:25:14,111 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 130 transitions. Word has length 41 [2023-12-02 17:25:14,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:25:14,111 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 130 transitions. [2023-12-02 17:25:14,111 INFO L496 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, (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) [2023-12-02 17:25:14,111 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 130 transitions. [2023-12-02 17:25:14,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-02 17:25:14,113 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:25:14,113 INFO L195 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, 1, 1, 1, 1] [2023-12-02 17:25:14,116 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Ended with exit code 0 [2023-12-02 17:25:14,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:25:14,314 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:25:14,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:25:14,314 INFO L85 PathProgramCache]: Analyzing trace with hash -457237696, now seen corresponding path program 1 times [2023-12-02 17:25:14,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:25:14,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1942548006] [2023-12-02 17:25:14,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:25:14,315 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 [2023-12-02 17:25:14,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:25:14,316 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 17:25:14,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-12-02 17:25:14,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:25:14,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 17:25:14,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:25:15,375 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 17:25:15,376 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:25:17,914 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 17:25:17,914 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:25:17,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1942548006] [2023-12-02 17:25:17,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1942548006] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:25:17,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [205491719] [2023-12-02 17:25:17,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:25:17,915 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:25:17,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:25:17,916 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:25:17,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2023-12-02 17:25:17,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:25:17,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 17:25:17,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:25:18,159 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 17:25:18,159 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:25:18,690 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 17:25:18,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [205491719] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:25:18,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624914723] [2023-12-02 17:25:18,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:25:18,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:25:18,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:25:18,692 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:25:18,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-02 17:25:18,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:25:18,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 17:25:18,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:25:18,889 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 17:25:18,889 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:25:19,403 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 17:25:19,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624914723] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:25:19,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:25:19,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 24 [2023-12-02 17:25:19,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733561183] [2023-12-02 17:25:19,404 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:25:19,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-02 17:25:19,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:25:19,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-02 17:25:19,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2023-12-02 17:25:19,407 INFO L87 Difference]: Start difference. First operand 101 states and 130 transitions. Second operand has 24 states, 18 states have (on average 2.111111111111111) internal successors, (38), 20 states have internal predecessors, (38), 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) [2023-12-02 17:25:24,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:25:24,823 INFO L93 Difference]: Finished difference Result 143 states and 200 transitions. [2023-12-02 17:25:24,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 17:25:24,825 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 18 states have (on average 2.111111111111111) internal successors, (38), 20 states have internal predecessors, (38), 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 43 [2023-12-02 17:25:24,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:25:24,826 INFO L225 Difference]: With dead ends: 143 [2023-12-02 17:25:24,826 INFO L226 Difference]: Without dead ends: 111 [2023-12-02 17:25:24,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=199, Invalid=1361, Unknown=0, NotChecked=0, Total=1560 [2023-12-02 17:25:24,828 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 124 mSDsluCounter, 925 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 991 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:25:24,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 991 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-12-02 17:25:24,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-12-02 17:25:24,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 90. [2023-12-02 17:25:24,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 64 states have (on average 1.234375) internal successors, (79), 69 states have internal predecessors, (79), 14 states have call successors, (14), 6 states have call predecessors, (14), 11 states have return successors, (32), 14 states have call predecessors, (32), 13 states have call successors, (32) [2023-12-02 17:25:24,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 125 transitions. [2023-12-02 17:25:24,846 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 125 transitions. Word has length 43 [2023-12-02 17:25:24,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:25:24,847 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 125 transitions. [2023-12-02 17:25:24,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 18 states have (on average 2.111111111111111) internal successors, (38), 20 states have internal predecessors, (38), 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) [2023-12-02 17:25:24,847 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 125 transitions. [2023-12-02 17:25:24,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-02 17:25:24,849 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:25:24,849 INFO L195 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, 1, 1, 1, 1] [2023-12-02 17:25:24,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Forceful destruction successful, exit code 0 [2023-12-02 17:25:25,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-02 17:25:25,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2023-12-02 17:25:25,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 17:25:25,451 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:25:25,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:25:25,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1881341508, now seen corresponding path program 2 times [2023-12-02 17:25:25,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:25:25,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [799443778] [2023-12-02 17:25:25,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:25:25,452 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 [2023-12-02 17:25:25,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:25:25,453 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 17:25:25,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 17:25:25,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:25:25,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:25:25,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 17:25:25,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:25:26,453 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 17:25:26,453 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:25:28,960 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 17:25:28,960 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:25:28,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [799443778] [2023-12-02 17:25:28,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [799443778] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:25:28,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [242764821] [2023-12-02 17:25:28,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:25:28,961 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:25:28,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:25:28,962 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:25:28,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2023-12-02 17:25:29,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:25:29,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:25:29,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 17:25:29,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:25:29,178 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 17:25:29,178 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:25:29,691 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 17:25:29,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [242764821] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:25:29,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819152731] [2023-12-02 17:25:29,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:25:29,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:25:29,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:25:29,693 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:25:29,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-02 17:25:29,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:25:29,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:25:29,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 17:25:29,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:25:29,919 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 17:25:29,919 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:25:30,432 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 17:25:30,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819152731] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:25:30,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:25:30,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 24 [2023-12-02 17:25:30,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026304366] [2023-12-02 17:25:30,433 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:25:30,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-02 17:25:30,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:25:30,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-02 17:25:30,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2023-12-02 17:25:30,436 INFO L87 Difference]: Start difference. First operand 90 states and 125 transitions. Second operand has 24 states, 18 states have (on average 2.111111111111111) internal successors, (38), 20 states have internal predecessors, (38), 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) [2023-12-02 17:25:36,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:25:36,069 INFO L93 Difference]: Finished difference Result 126 states and 175 transitions. [2023-12-02 17:25:36,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-02 17:25:36,070 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 18 states have (on average 2.111111111111111) internal successors, (38), 20 states have internal predecessors, (38), 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 43 [2023-12-02 17:25:36,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:25:36,072 INFO L225 Difference]: With dead ends: 126 [2023-12-02 17:25:36,072 INFO L226 Difference]: Without dead ends: 101 [2023-12-02 17:25:36,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 17:25:36,074 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 120 mSDsluCounter, 1013 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:25:36,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 1079 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-12-02 17:25:36,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-12-02 17:25:36,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 76. [2023-12-02 17:25:36,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 59 states have internal predecessors, (69), 12 states have call successors, (12), 4 states have call predecessors, (12), 9 states have return successors, (28), 12 states have call predecessors, (28), 11 states have call successors, (28) [2023-12-02 17:25:36,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 109 transitions. [2023-12-02 17:25:36,089 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 109 transitions. Word has length 43 [2023-12-02 17:25:36,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:25:36,089 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 109 transitions. [2023-12-02 17:25:36,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 18 states have (on average 2.111111111111111) internal successors, (38), 20 states have internal predecessors, (38), 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) [2023-12-02 17:25:36,089 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 109 transitions. [2023-12-02 17:25:36,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-02 17:25:36,090 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:25:36,091 INFO L195 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, 1, 1, 1, 1] [2023-12-02 17:25:36,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 17:25:36,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-12-02 17:25:36,493 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2023-12-02 17:25:36,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 17:25:36,692 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:25:36,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:25:36,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1331527951, now seen corresponding path program 1 times [2023-12-02 17:25:36,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:25:36,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [313652381] [2023-12-02 17:25:36,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:25:36,693 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 [2023-12-02 17:25:36,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:25:36,693 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 17:25:36,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 17:25:36,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:25:36,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:25:36,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:25:38,396 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 17:25:38,396 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:25:38,396 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:25:38,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [313652381] [2023-12-02 17:25:38,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [313652381] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:25:38,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:25:38,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 17:25:38,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329438576] [2023-12-02 17:25:38,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:25:38,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 17:25:38,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:25:38,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 17:25:38,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-12-02 17:25:38,398 INFO L87 Difference]: Start difference. First operand 76 states and 109 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 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) [2023-12-02 17:25:39,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:25:39,760 INFO L93 Difference]: Finished difference Result 86 states and 122 transitions. [2023-12-02 17:25:39,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 17:25:39,761 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 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 46 [2023-12-02 17:25:39,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:25:39,762 INFO L225 Difference]: With dead ends: 86 [2023-12-02 17:25:39,762 INFO L226 Difference]: Without dead ends: 84 [2023-12-02 17:25:39,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-12-02 17:25:39,763 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 14 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:25:39,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 211 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-02 17:25:39,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-12-02 17:25:39,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2023-12-02 17:25:39,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 57 states have (on average 1.263157894736842) internal successors, (72), 63 states have internal predecessors, (72), 13 states have call successors, (13), 5 states have call predecessors, (13), 10 states have return successors, (29), 12 states have call predecessors, (29), 12 states have call successors, (29) [2023-12-02 17:25:39,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 114 transitions. [2023-12-02 17:25:39,776 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 114 transitions. Word has length 46 [2023-12-02 17:25:39,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:25:39,776 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 114 transitions. [2023-12-02 17:25:39,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 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) [2023-12-02 17:25:39,777 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 114 transitions. [2023-12-02 17:25:39,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 17:25:39,777 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:25:39,778 INFO L195 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, 1, 1, 1, 1, 1] [2023-12-02 17:25:39,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 17:25:39,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:25:39,978 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:25:39,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:25:39,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1441244704, now seen corresponding path program 1 times [2023-12-02 17:25:39,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:25:39,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1747683828] [2023-12-02 17:25:39,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:25:39,979 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 [2023-12-02 17:25:39,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:25:39,980 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 17:25:39,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Waiting until timeout for monitored process [2023-12-02 17:25:40,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:25:40,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:25:40,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:25:46,924 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 17:25:46,925 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:25:46,925 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:25:46,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1747683828] [2023-12-02 17:25:46,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1747683828] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:25:46,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:25:46,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 17:25:46,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820162395] [2023-12-02 17:25:46,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:25:46,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 17:25:46,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:25:46,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 17:25:46,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=38, Unknown=3, NotChecked=0, Total=56 [2023-12-02 17:25:46,927 INFO L87 Difference]: Start difference. First operand 81 states and 114 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) [2023-12-02 17:25:49,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:25:51,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:25:53,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:25:55,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:25:57,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:26:00,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:26:02,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:26:04,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:26:06,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:26:08,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:26:10,419 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] [2023-12-02 17:26:10,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:26:10,434 INFO L93 Difference]: Finished difference Result 90 states and 125 transitions. [2023-12-02 17:26:10,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 17:26:10,435 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 47 [2023-12-02 17:26:10,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:26:10,436 INFO L225 Difference]: With dead ends: 90 [2023-12-02 17:26:10,436 INFO L226 Difference]: Without dead ends: 86 [2023-12-02 17:26:10,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=24, Invalid=62, Unknown=4, NotChecked=0, Total=90 [2023-12-02 17:26:10,437 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 13 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:26:10,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 319 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 9 Unknown, 0 Unchecked, 21.3s Time] [2023-12-02 17:26:10,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-12-02 17:26:10,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2023-12-02 17:26:10,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 56 states have (on average 1.25) internal successors, (70), 60 states have internal predecessors, (70), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (28), 12 states have call predecessors, (28), 11 states have call successors, (28) [2023-12-02 17:26:10,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 110 transitions. [2023-12-02 17:26:10,450 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 110 transitions. Word has length 47 [2023-12-02 17:26:10,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:26:10,450 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 110 transitions. [2023-12-02 17:26:10,451 INFO L496 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) [2023-12-02 17:26:10,451 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 110 transitions. [2023-12-02 17:26:10,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-02 17:26:10,452 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:26:10,452 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 17:26:10,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Ended with exit code 0 [2023-12-02 17:26:10,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:26:10,653 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:26:10,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:26:10,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1444047229, now seen corresponding path program 1 times [2023-12-02 17:26:10,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:26:10,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [855165831] [2023-12-02 17:26:10,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:10,653 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 [2023-12-02 17:26:10,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:26:10,654 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 17:26:10,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-12-02 17:26:10,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:10,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:26:10,701 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:26:11,095 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:26:11,096 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:26:11,776 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:26:11,776 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:26:11,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [855165831] [2023-12-02 17:26:11,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [855165831] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:26:11,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [606361852] [2023-12-02 17:26:11,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:11,777 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:26:11,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:26:11,778 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:26:11,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2023-12-02 17:26:11,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:11,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 17:26:11,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:26:12,319 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 17:26:12,319 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:26:12,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [606361852] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:26:12,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:26:12,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2023-12-02 17:26:12,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946956811] [2023-12-02 17:26:12,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:26:12,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:26:12,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:26:12,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:26:12,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-12-02 17:26:12,321 INFO L87 Difference]: Start difference. First operand 78 states and 110 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 17:26:12,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:26:12,724 INFO L93 Difference]: Finished difference Result 108 states and 166 transitions. [2023-12-02 17:26:12,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:26:12,726 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 49 [2023-12-02 17:26:12,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:26:12,727 INFO L225 Difference]: With dead ends: 108 [2023-12-02 17:26:12,727 INFO L226 Difference]: Without dead ends: 97 [2023-12-02 17:26:12,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-12-02 17:26:12,728 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 30 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:26:12,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 258 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 17:26:12,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-12-02 17:26:12,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 90. [2023-12-02 17:26:12,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 63 states have (on average 1.253968253968254) internal successors, (79), 69 states have internal predecessors, (79), 15 states have call successors, (15), 5 states have call predecessors, (15), 11 states have return successors, (44), 15 states have call predecessors, (44), 14 states have call successors, (44) [2023-12-02 17:26:12,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 138 transitions. [2023-12-02 17:26:12,747 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 138 transitions. Word has length 49 [2023-12-02 17:26:12,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:26:12,747 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 138 transitions. [2023-12-02 17:26:12,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 17:26:12,748 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 138 transitions. [2023-12-02 17:26:12,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-02 17:26:12,749 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:26:12,749 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 17:26:12,751 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Ended with exit code 0 [2023-12-02 17:26:12,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2023-12-02 17:26:13,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 17:26:13,150 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:26:13,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:26:13,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1883798412, now seen corresponding path program 1 times [2023-12-02 17:26:13,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:26:13,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1523210728] [2023-12-02 17:26:13,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:13,151 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 [2023-12-02 17:26:13,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:26:13,152 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 17:26:13,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 17:26:13,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:13,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:26:13,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:26:13,664 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:26:13,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:26:14,449 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:26:14,450 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:26:14,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1523210728] [2023-12-02 17:26:14,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1523210728] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:26:14,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [64341843] [2023-12-02 17:26:14,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:14,450 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:26:14,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:26:14,451 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:26:14,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2023-12-02 17:26:14,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:14,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:26:14,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:26:14,700 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:26:14,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:26:15,241 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:26:15,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [64341843] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:26:15,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181003771] [2023-12-02 17:26:15,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:15,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:26:15,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:26:15,242 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:26:15,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-12-02 17:26:15,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:15,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:26:15,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:26:15,500 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:26:15,500 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:26:16,046 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:26:16,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181003771] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:26:16,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:26:16,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2023-12-02 17:26:16,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759438840] [2023-12-02 17:26:16,047 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:26:16,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 17:26:16,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:26:16,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 17:26:16,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-12-02 17:26:16,048 INFO L87 Difference]: Start difference. First operand 90 states and 138 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 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) [2023-12-02 17:26:17,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:26:17,222 INFO L93 Difference]: Finished difference Result 103 states and 155 transitions. [2023-12-02 17:26:17,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 17:26:17,223 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 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 58 [2023-12-02 17:26:17,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:26:17,224 INFO L225 Difference]: With dead ends: 103 [2023-12-02 17:26:17,225 INFO L226 Difference]: Without dead ends: 92 [2023-12-02 17:26:17,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2023-12-02 17:26:17,226 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 87 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 17:26:17,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 471 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-02 17:26:17,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-12-02 17:26:17,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2023-12-02 17:26:17,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 64 states have (on average 1.25) internal successors, (80), 71 states have internal predecessors, (80), 15 states have call successors, (15), 5 states have call predecessors, (15), 12 states have return successors, (46), 15 states have call predecessors, (46), 14 states have call successors, (46) [2023-12-02 17:26:17,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 141 transitions. [2023-12-02 17:26:17,240 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 141 transitions. Word has length 58 [2023-12-02 17:26:17,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:26:17,240 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 141 transitions. [2023-12-02 17:26:17,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 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) [2023-12-02 17:26:17,240 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 141 transitions. [2023-12-02 17:26:17,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-02 17:26:17,242 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:26:17,242 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 17:26:17,244 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2023-12-02 17:26:17,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Ended with exit code 0 [2023-12-02 17:26:17,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-12-02 17:26:17,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:26:17,843 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:26:17,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:26:17,844 INFO L85 PathProgramCache]: Analyzing trace with hash 951623496, now seen corresponding path program 2 times [2023-12-02 17:26:17,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:26:17,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [942966823] [2023-12-02 17:26:17,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:26:17,844 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 [2023-12-02 17:26:17,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:26:17,845 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 17:26:17,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 17:26:17,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:26:17,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:26:17,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:26:17,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:26:18,381 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:26:18,381 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:26:19,190 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:26:19,191 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:26:19,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [942966823] [2023-12-02 17:26:19,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [942966823] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:26:19,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [98464102] [2023-12-02 17:26:19,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:26:19,191 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:26:19,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:26:19,192 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:26:19,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2023-12-02 17:26:19,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:26:19,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:26:19,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 17:26:19,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:26:19,478 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:26:19,478 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:26:19,982 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:26:19,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [98464102] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:26:19,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741045629] [2023-12-02 17:26:19,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:26:19,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:26:19,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:26:19,984 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:26:19,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-12-02 17:26:20,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:26:20,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:26:20,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:26:20,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:26:20,242 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:26:20,242 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:26:20,743 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:26:20,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741045629] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:26:20,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:26:20,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2023-12-02 17:26:20,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565049307] [2023-12-02 17:26:20,745 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:26:20,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 17:26:20,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:26:20,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 17:26:20,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-12-02 17:26:20,747 INFO L87 Difference]: Start difference. First operand 92 states and 141 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 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) [2023-12-02 17:26:21,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:26:21,817 INFO L93 Difference]: Finished difference Result 105 states and 159 transitions. [2023-12-02 17:26:21,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 17:26:21,818 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 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 58 [2023-12-02 17:26:21,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:26:21,819 INFO L225 Difference]: With dead ends: 105 [2023-12-02 17:26:21,819 INFO L226 Difference]: Without dead ends: 92 [2023-12-02 17:26:21,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-12-02 17:26:21,821 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 88 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 17:26:21,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 351 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 17:26:21,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-12-02 17:26:21,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2023-12-02 17:26:21,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 64 states have (on average 1.25) internal successors, (80), 71 states have internal predecessors, (80), 15 states have call successors, (15), 5 states have call predecessors, (15), 12 states have return successors, (45), 15 states have call predecessors, (45), 14 states have call successors, (45) [2023-12-02 17:26:21,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 140 transitions. [2023-12-02 17:26:21,831 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 140 transitions. Word has length 58 [2023-12-02 17:26:21,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:26:21,831 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 140 transitions. [2023-12-02 17:26:21,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 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) [2023-12-02 17:26:21,831 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 140 transitions. [2023-12-02 17:26:21,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-02 17:26:21,832 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:26:21,832 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 17:26:21,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2023-12-02 17:26:22,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-12-02 17:26:22,236 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Ended with exit code 0 [2023-12-02 17:26:22,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:26:22,433 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:26:22,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:26:22,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1665973366, now seen corresponding path program 1 times [2023-12-02 17:26:22,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:26:22,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1118005020] [2023-12-02 17:26:22,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:22,434 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 [2023-12-02 17:26:22,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:26:22,435 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 17:26:22,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 17:26:22,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:22,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:26:22,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:26:22,948 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:26:22,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:26:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:26:23,733 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:26:23,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1118005020] [2023-12-02 17:26:23,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1118005020] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:26:23,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1188333449] [2023-12-02 17:26:23,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:23,733 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:26:23,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:26:23,734 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:26:23,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2023-12-02 17:26:23,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:23,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:26:23,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:26:24,019 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:26:24,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:26:24,577 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:26:24,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1188333449] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:26:24,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637036607] [2023-12-02 17:26:24,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:24,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:26:24,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:26:24,579 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:26:24,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-12-02 17:26:24,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:24,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:26:24,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:26:24,841 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:26:24,841 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:26:25,437 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:26:25,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637036607] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:26:25,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:26:25,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2023-12-02 17:26:25,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265675107] [2023-12-02 17:26:25,438 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:26:25,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 17:26:25,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:26:25,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 17:26:25,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-12-02 17:26:25,440 INFO L87 Difference]: Start difference. First operand 92 states and 140 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 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) [2023-12-02 17:26:26,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:26:26,594 INFO L93 Difference]: Finished difference Result 103 states and 151 transitions. [2023-12-02 17:26:26,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 17:26:26,595 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 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 60 [2023-12-02 17:26:26,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:26:26,596 INFO L225 Difference]: With dead ends: 103 [2023-12-02 17:26:26,596 INFO L226 Difference]: Without dead ends: 90 [2023-12-02 17:26:26,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-12-02 17:26:26,597 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 78 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:26:26,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 429 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 17:26:26,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-12-02 17:26:26,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2023-12-02 17:26:26,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 69 states have internal predecessors, (78), 15 states have call successors, (15), 5 states have call predecessors, (15), 11 states have return successors, (41), 15 states have call predecessors, (41), 14 states have call successors, (41) [2023-12-02 17:26:26,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 134 transitions. [2023-12-02 17:26:26,614 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 134 transitions. Word has length 60 [2023-12-02 17:26:26,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:26:26,614 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 134 transitions. [2023-12-02 17:26:26,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 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) [2023-12-02 17:26:26,614 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 134 transitions. [2023-12-02 17:26:26,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-02 17:26:26,616 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:26:26,616 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 17:26:26,620 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Ended with exit code 0 [2023-12-02 17:26:26,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-12-02 17:26:27,018 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2023-12-02 17:26:27,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 17:26:27,217 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:26:27,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:26:27,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1901506550, now seen corresponding path program 2 times [2023-12-02 17:26:27,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:26:27,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1427329875] [2023-12-02 17:26:27,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:26:27,218 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 [2023-12-02 17:26:27,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:26:27,219 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 17:26:27,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 17:26:27,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:26:27,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:26:27,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:26:27,269 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:26:27,757 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:26:27,757 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:26:28,577 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:26:28,577 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:26:28,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1427329875] [2023-12-02 17:26:28,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1427329875] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:26:28,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1961683876] [2023-12-02 17:26:28,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:26:28,578 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:26:28,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:26:28,579 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:26:28,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2023-12-02 17:26:28,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:26:28,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:26:28,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:26:28,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:26:28,856 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:26:28,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:26:29,379 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:26:29,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1961683876] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:26:29,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180851437] [2023-12-02 17:26:29,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:26:29,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:26:29,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:26:29,380 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:26:29,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-12-02 17:26:29,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:26:29,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:26:29,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:26:29,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:26:29,643 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:26:29,643 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:26:30,163 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:26:30,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180851437] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:26:30,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:26:30,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2023-12-02 17:26:30,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734386445] [2023-12-02 17:26:30,163 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:26:30,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 17:26:30,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:26:30,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 17:26:30,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-12-02 17:26:30,165 INFO L87 Difference]: Start difference. First operand 90 states and 134 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 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) [2023-12-02 17:26:31,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:26:31,081 INFO L93 Difference]: Finished difference Result 101 states and 145 transitions. [2023-12-02 17:26:31,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 17:26:31,082 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 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 60 [2023-12-02 17:26:31,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:26:31,083 INFO L225 Difference]: With dead ends: 101 [2023-12-02 17:26:31,083 INFO L226 Difference]: Without dead ends: 88 [2023-12-02 17:26:31,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2023-12-02 17:26:31,084 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 88 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 17:26:31,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 381 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 17:26:31,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-12-02 17:26:31,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-12-02 17:26:31,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 67 states have internal predecessors, (76), 15 states have call successors, (15), 5 states have call predecessors, (15), 10 states have return successors, (39), 15 states have call predecessors, (39), 14 states have call successors, (39) [2023-12-02 17:26:31,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 130 transitions. [2023-12-02 17:26:31,094 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 130 transitions. Word has length 60 [2023-12-02 17:26:31,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:26:31,095 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 130 transitions. [2023-12-02 17:26:31,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 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) [2023-12-02 17:26:31,095 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 130 transitions. [2023-12-02 17:26:31,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-02 17:26:31,096 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:26:31,097 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 17:26:31,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-12-02 17:26:31,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2023-12-02 17:26:31,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Ended with exit code 0 [2023-12-02 17:26:31,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:26:31,698 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:26:31,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:26:31,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1496575112, now seen corresponding path program 1 times [2023-12-02 17:26:31,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:26:31,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1726710875] [2023-12-02 17:26:31,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:31,698 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 [2023-12-02 17:26:31,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:26:31,699 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 17:26:31,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 17:26:31,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:31,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 17:26:31,761 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:26:34,207 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 17:26:34,208 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:26:40,631 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 17:26:40,632 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:26:40,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1726710875] [2023-12-02 17:26:40,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1726710875] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:26:40,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1475380781] [2023-12-02 17:26:40,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:40,632 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:26:40,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:26:40,634 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:26:40,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2023-12-02 17:26:40,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:40,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-02 17:26:40,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:26:42,396 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 17:26:42,396 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:26:44,873 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 17:26:44,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1475380781] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:26:44,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306871472] [2023-12-02 17:26:44,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:44,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:26:44,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:26:44,874 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:26:44,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-12-02 17:26:44,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:44,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-02 17:26:44,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:26:45,699 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 17:26:45,699 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:26:48,099 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 17:26:48,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306871472] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:26:48,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:26:48,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16, 16, 16, 16] total 30 [2023-12-02 17:26:48,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358300503] [2023-12-02 17:26:48,100 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:26:48,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-02 17:26:48,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:26:48,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-02 17:26:48,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2023-12-02 17:26:48,102 INFO L87 Difference]: Start difference. First operand 88 states and 130 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 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) [2023-12-02 17:27:01,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:27:01,607 INFO L93 Difference]: Finished difference Result 149 states and 214 transitions. [2023-12-02 17:27:01,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-02 17:27:01,609 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 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 67 [2023-12-02 17:27:01,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:27:01,610 INFO L225 Difference]: With dead ends: 149 [2023-12-02 17:27:01,610 INFO L226 Difference]: Without dead ends: 116 [2023-12-02 17:27:01,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=527, Invalid=2443, Unknown=0, NotChecked=0, Total=2970 [2023-12-02 17:27:01,613 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 227 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:27:01,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 762 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2023-12-02 17:27:01,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-12-02 17:27:01,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 104. [2023-12-02 17:27:01,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 74 states have (on average 1.2027027027027026) internal successors, (89), 79 states have internal predecessors, (89), 18 states have call successors, (18), 6 states have call predecessors, (18), 11 states have return successors, (51), 18 states have call predecessors, (51), 17 states have call successors, (51) [2023-12-02 17:27:01,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 158 transitions. [2023-12-02 17:27:01,634 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 158 transitions. Word has length 67 [2023-12-02 17:27:01,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:27:01,635 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 158 transitions. [2023-12-02 17:27:01,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 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) [2023-12-02 17:27:01,635 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 158 transitions. [2023-12-02 17:27:01,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-02 17:27:01,637 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:27:01,637 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 17:27:01,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-12-02 17:27:01,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Ended with exit code 0 [2023-12-02 17:27:02,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (43)] Ended with exit code 0 [2023-12-02 17:27:02,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 17:27:02,238 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:27:02,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:27:02,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1259745416, now seen corresponding path program 2 times [2023-12-02 17:27:02,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:27:02,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1037307397] [2023-12-02 17:27:02,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:27:02,239 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 [2023-12-02 17:27:02,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:27:02,240 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 17:27:02,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 17:27:02,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:27:02,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:27:02,312 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 17:27:02,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:27:04,801 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 17:27:04,801 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:27:11,207 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 17:27:11,207 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:27:11,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1037307397] [2023-12-02 17:27:11,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1037307397] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:27:11,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1974152747] [2023-12-02 17:27:11,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:27:11,208 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:27:11,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:27:11,209 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:27:11,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2023-12-02 17:27:11,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:27:11,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:27:11,343 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-02 17:27:11,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:27:12,854 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 17:27:12,854 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:27:15,254 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 17:27:15,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1974152747] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:27:15,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006888710] [2023-12-02 17:27:15,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:27:15,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:27:15,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:27:15,256 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:27:15,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-12-02 17:27:15,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:27:15,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:27:15,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-02 17:27:15,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:27:16,109 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 17:27:16,110 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:27:18,440 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 17:27:18,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006888710] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:27:18,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:27:18,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16, 16, 16, 16] total 30 [2023-12-02 17:27:18,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867089227] [2023-12-02 17:27:18,441 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:27:18,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-02 17:27:18,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:27:18,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-02 17:27:18,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2023-12-02 17:27:18,443 INFO L87 Difference]: Start difference. First operand 104 states and 158 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 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) [2023-12-02 17:27:32,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:27:32,115 INFO L93 Difference]: Finished difference Result 167 states and 239 transitions. [2023-12-02 17:27:32,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-02 17:27:32,116 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 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 67 [2023-12-02 17:27:32,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:27:32,118 INFO L225 Difference]: With dead ends: 167 [2023-12-02 17:27:32,119 INFO L226 Difference]: Without dead ends: 132 [2023-12-02 17:27:32,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=545, Invalid=2535, Unknown=0, NotChecked=0, Total=3080 [2023-12-02 17:27:32,121 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 227 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2023-12-02 17:27:32,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 730 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 734 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2023-12-02 17:27:32,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-12-02 17:27:32,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 118. [2023-12-02 17:27:32,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 85 states have (on average 1.188235294117647) internal successors, (101), 90 states have internal predecessors, (101), 20 states have call successors, (20), 7 states have call predecessors, (20), 12 states have return successors, (53), 20 states have call predecessors, (53), 19 states have call successors, (53) [2023-12-02 17:27:32,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 174 transitions. [2023-12-02 17:27:32,143 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 174 transitions. Word has length 67 [2023-12-02 17:27:32,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:27:32,144 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 174 transitions. [2023-12-02 17:27:32,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 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) [2023-12-02 17:27:32,144 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 174 transitions. [2023-12-02 17:27:32,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-12-02 17:27:32,145 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:27:32,145 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 17:27:32,151 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2023-12-02 17:27:32,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Ended with exit code 0 [2023-12-02 17:27:32,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2023-12-02 17:27:32,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 17:27:32,746 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:27:32,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:27:32,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1988474141, now seen corresponding path program 1 times [2023-12-02 17:27:32,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:27:32,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [415637599] [2023-12-02 17:27:32,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:27:32,747 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 [2023-12-02 17:27:32,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:27:32,748 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 17:27:32,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 17:27:32,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:27:32,816 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 17:27:32,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:27:33,260 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 17:27:33,260 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:27:33,260 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:27:33,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [415637599] [2023-12-02 17:27:33,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [415637599] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:27:33,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:27:33,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 17:27:33,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594971511] [2023-12-02 17:27:33,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:27:33,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 17:27:33,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:27:33,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 17:27:33,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-12-02 17:27:33,262 INFO L87 Difference]: Start difference. First operand 118 states and 174 transitions. Second operand has 8 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 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) [2023-12-02 17:27:33,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:27:33,701 INFO L93 Difference]: Finished difference Result 132 states and 189 transitions. [2023-12-02 17:27:33,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 17:27:33,702 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 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 69 [2023-12-02 17:27:33,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:27:33,703 INFO L225 Difference]: With dead ends: 132 [2023-12-02 17:27:33,703 INFO L226 Difference]: Without dead ends: 123 [2023-12-02 17:27:33,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-12-02 17:27:33,704 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 6 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:27:33,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 326 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 17:27:33,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-12-02 17:27:33,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 118. [2023-12-02 17:27:33,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 85 states have (on average 1.188235294117647) internal successors, (101), 90 states have internal predecessors, (101), 20 states have call successors, (20), 7 states have call predecessors, (20), 12 states have return successors, (50), 20 states have call predecessors, (50), 19 states have call successors, (50) [2023-12-02 17:27:33,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 171 transitions. [2023-12-02 17:27:33,733 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 171 transitions. Word has length 69 [2023-12-02 17:27:33,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:27:33,734 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 171 transitions. [2023-12-02 17:27:33,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 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) [2023-12-02 17:27:33,734 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 171 transitions. [2023-12-02 17:27:33,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-12-02 17:27:33,736 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:27:33,736 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 17:27:33,740 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 17:27:33,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:27:33,937 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:27:33,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:27:33,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1985480642, now seen corresponding path program 1 times [2023-12-02 17:27:33,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:27:33,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1002832794] [2023-12-02 17:27:33,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:27:33,938 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 [2023-12-02 17:27:33,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:27:33,939 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 17:27:33,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 17:27:34,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:27:34,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 17:27:34,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:27:36,583 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 17:27:36,583 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:27:43,318 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 17:27:43,318 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:27:43,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1002832794] [2023-12-02 17:27:43,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1002832794] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:27:43,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [634218760] [2023-12-02 17:27:43,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:27:43,319 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:27:43,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:27:43,320 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:27:43,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2023-12-02 17:27:43,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:27:43,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 17:27:43,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:27:44,220 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 17:27:44,220 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:27:46,685 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 17:27:46,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [634218760] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:27:46,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758160976] [2023-12-02 17:27:46,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:27:46,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:27:46,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:27:46,687 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:27:46,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-12-02 17:27:46,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:27:46,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 17:27:46,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:27:47,483 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 17:27:47,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:27:49,927 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 17:27:49,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758160976] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:27:49,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:27:49,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 15, 16, 15, 16] total 28 [2023-12-02 17:27:49,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045484401] [2023-12-02 17:27:49,928 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:27:49,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-02 17:27:49,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:27:49,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-02 17:27:49,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2023-12-02 17:27:49,930 INFO L87 Difference]: Start difference. First operand 118 states and 171 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 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) [2023-12-02 17:27:58,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:27:58,610 INFO L93 Difference]: Finished difference Result 149 states and 205 transitions. [2023-12-02 17:27:58,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-02 17:27:58,612 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 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 69 [2023-12-02 17:27:58,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:27:58,614 INFO L225 Difference]: With dead ends: 149 [2023-12-02 17:27:58,614 INFO L226 Difference]: Without dead ends: 130 [2023-12-02 17:27:58,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=381, Invalid=1511, Unknown=0, NotChecked=0, Total=1892 [2023-12-02 17:27:58,615 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 137 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:27:58,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 793 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-12-02 17:27:58,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-12-02 17:27:58,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 120. [2023-12-02 17:27:58,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 91 states have internal predecessors, (103), 20 states have call successors, (20), 8 states have call predecessors, (20), 12 states have return successors, (45), 20 states have call predecessors, (45), 19 states have call successors, (45) [2023-12-02 17:27:58,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 168 transitions. [2023-12-02 17:27:58,641 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 168 transitions. Word has length 69 [2023-12-02 17:27:58,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:27:58,641 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 168 transitions. [2023-12-02 17:27:58,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 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) [2023-12-02 17:27:58,642 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 168 transitions. [2023-12-02 17:27:58,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-12-02 17:27:58,643 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:27:58,643 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 17:27:58,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2023-12-02 17:27:58,845 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (50)] Ended with exit code 0 [2023-12-02 17:27:59,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Ended with exit code 0 [2023-12-02 17:27:59,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:27:59,244 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:27:59,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:27:59,245 INFO L85 PathProgramCache]: Analyzing trace with hash 41417662, now seen corresponding path program 2 times [2023-12-02 17:27:59,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:27:59,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [827325325] [2023-12-02 17:27:59,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:27:59,245 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 [2023-12-02 17:27:59,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:27:59,246 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 17:27:59,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 17:27:59,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:27:59,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:27:59,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 17:27:59,336 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:28:01,727 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 17:28:01,728 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:28:08,201 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 17:28:08,202 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:28:08,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [827325325] [2023-12-02 17:28:08,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [827325325] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:28:08,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [825511380] [2023-12-02 17:28:08,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:28:08,202 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:28:08,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:28:08,203 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:28:08,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2023-12-02 17:28:08,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:28:08,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:28:08,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 17:28:08,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:28:09,088 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 17:28:09,088 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:28:11,535 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 17:28:11,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [825511380] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:28:11,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623793627] [2023-12-02 17:28:11,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:28:11,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:28:11,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:28:11,537 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:28:11,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-12-02 17:28:11,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:28:11,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:28:11,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 17:28:11,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:28:12,341 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 17:28:12,341 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:28:15,086 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 17:28:15,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623793627] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:28:15,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:28:15,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 15, 16, 15, 16] total 28 [2023-12-02 17:28:15,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251410713] [2023-12-02 17:28:15,087 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:28:15,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-02 17:28:15,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:28:15,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-02 17:28:15,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2023-12-02 17:28:15,090 INFO L87 Difference]: Start difference. First operand 120 states and 168 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 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) [2023-12-02 17:28:24,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:28:24,574 INFO L93 Difference]: Finished difference Result 151 states and 202 transitions. [2023-12-02 17:28:24,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-02 17:28:24,576 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 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 69 [2023-12-02 17:28:24,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:28:24,578 INFO L225 Difference]: With dead ends: 151 [2023-12-02 17:28:24,578 INFO L226 Difference]: Without dead ends: 138 [2023-12-02 17:28:24,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=375, Invalid=1517, Unknown=0, NotChecked=0, Total=1892 [2023-12-02 17:28:24,580 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 133 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-12-02 17:28:24,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 761 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2023-12-02 17:28:24,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-12-02 17:28:24,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 128. [2023-12-02 17:28:24,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 94 states have (on average 1.1808510638297873) internal successors, (111), 97 states have internal predecessors, (111), 21 states have call successors, (21), 9 states have call predecessors, (21), 12 states have return successors, (43), 21 states have call predecessors, (43), 20 states have call successors, (43) [2023-12-02 17:28:24,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 175 transitions. [2023-12-02 17:28:24,612 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 175 transitions. Word has length 69 [2023-12-02 17:28:24,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:28:24,612 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 175 transitions. [2023-12-02 17:28:24,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 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) [2023-12-02 17:28:24,613 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 175 transitions. [2023-12-02 17:28:24,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-02 17:28:24,614 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:28:24,615 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2023-12-02 17:28:24,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (53)] Ended with exit code 0 [2023-12-02 17:28:24,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Ended with exit code 0 [2023-12-02 17:28:25,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2023-12-02 17:28:25,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:28:25,216 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:28:25,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:28:25,216 INFO L85 PathProgramCache]: Analyzing trace with hash 183608441, now seen corresponding path program 1 times [2023-12-02 17:28:25,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:28:25,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2090661355] [2023-12-02 17:28:25,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:28:25,216 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 [2023-12-02 17:28:25,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:28:25,217 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 17:28:25,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 17:28:25,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:28:25,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 43 conjunts are in the unsatisfiable core [2023-12-02 17:28:25,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:28:31,501 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 17:28:31,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:28:54,277 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:28:54,277 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:28:54,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2090661355] [2023-12-02 17:28:54,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2090661355] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:28:54,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [840915759] [2023-12-02 17:28:54,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:28:54,278 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:28:54,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:28:54,279 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:28:54,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2023-12-02 17:28:54,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:28:54,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-02 17:28:54,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:28:59,812 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 17:28:59,812 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:29:17,032 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:29:17,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [840915759] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:29:17,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465310195] [2023-12-02 17:29:17,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:29:17,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:29:17,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:29:17,033 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:29:17,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-12-02 17:29:17,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:29:17,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 45 conjunts are in the unsatisfiable core [2023-12-02 17:29:17,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:29:19,712 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 17:29:19,712 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:29:33,796 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-02 17:29:33,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465310195] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:29:33,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:29:33,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24, 18, 18, 24, 26] total 73 [2023-12-02 17:29:33,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331038550] [2023-12-02 17:29:33,798 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:29:33,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2023-12-02 17:29:33,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:29:33,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2023-12-02 17:29:33,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=627, Invalid=4629, Unknown=0, NotChecked=0, Total=5256 [2023-12-02 17:29:33,802 INFO L87 Difference]: Start difference. First operand 128 states and 175 transitions. Second operand has 73 states, 67 states have (on average 1.5970149253731343) internal successors, (107), 70 states have internal predecessors, (107), 17 states have call successors, (20), 2 states have call predecessors, (20), 9 states have return successors, (23), 17 states have call predecessors, (23), 16 states have call successors, (23) [2023-12-02 17:29:51,277 WARN L293 SmtUtils]: Spent 5.06s on a formula simplification. DAG size of input: 90 DAG size of output: 54 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:30:20,631 WARN L293 SmtUtils]: Spent 22.60s on a formula simplification. DAG size of input: 92 DAG size of output: 69 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:30:33,080 WARN L293 SmtUtils]: Spent 9.22s on a formula simplification. DAG size of input: 96 DAG size of output: 59 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:30:46,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 17:30:47,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 17:30:48,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 17:31:00,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:31:00,652 INFO L93 Difference]: Finished difference Result 161 states and 214 transitions. [2023-12-02 17:31:00,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-12-02 17:31:00,653 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 67 states have (on average 1.5970149253731343) internal successors, (107), 70 states have internal predecessors, (107), 17 states have call successors, (20), 2 states have call predecessors, (20), 9 states have return successors, (23), 17 states have call predecessors, (23), 16 states have call successors, (23) Word has length 76 [2023-12-02 17:31:00,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:31:00,655 INFO L225 Difference]: With dead ends: 161 [2023-12-02 17:31:00,655 INFO L226 Difference]: Without dead ends: 148 [2023-12-02 17:31:00,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 377 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2219 ImplicationChecksByTransitivity, 114.5s TimeCoverageRelationStatistics Valid=1359, Invalid=8943, Unknown=0, NotChecked=0, Total=10302 [2023-12-02 17:31:00,660 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 231 mSDsluCounter, 1494 mSDsCounter, 0 mSdLazyCounter, 2048 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 1544 SdHoareTripleChecker+Invalid, 2154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 2048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.9s IncrementalHoareTripleChecker+Time [2023-12-02 17:31:00,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 1544 Invalid, 2154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 2048 Invalid, 0 Unknown, 0 Unchecked, 22.9s Time] [2023-12-02 17:31:00,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-12-02 17:31:00,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 132. [2023-12-02 17:31:00,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 97 states have (on average 1.175257731958763) internal successors, (114), 99 states have internal predecessors, (114), 22 states have call successors, (22), 9 states have call predecessors, (22), 12 states have return successors, (41), 23 states have call predecessors, (41), 21 states have call successors, (41) [2023-12-02 17:31:00,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 177 transitions. [2023-12-02 17:31:00,688 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 177 transitions. Word has length 76 [2023-12-02 17:31:00,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:31:00,688 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 177 transitions. [2023-12-02 17:31:00,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 67 states have (on average 1.5970149253731343) internal successors, (107), 70 states have internal predecessors, (107), 17 states have call successors, (20), 2 states have call predecessors, (20), 9 states have return successors, (23), 17 states have call predecessors, (23), 16 states have call successors, (23) [2023-12-02 17:31:00,688 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 177 transitions. [2023-12-02 17:31:00,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-12-02 17:31:00,690 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:31:00,690 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2023-12-02 17:31:00,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 17:31:00,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (56)] Forceful destruction successful, exit code 0 [2023-12-02 17:31:01,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2023-12-02 17:31:01,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:31:01,291 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:31:01,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:31:01,291 INFO L85 PathProgramCache]: Analyzing trace with hash -53375611, now seen corresponding path program 1 times [2023-12-02 17:31:01,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:31:01,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [105983088] [2023-12-02 17:31:01,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:01,292 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 [2023-12-02 17:31:01,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:31:01,293 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 17:31:01,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 17:31:01,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:01,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 17:31:01,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:31:03,586 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 17:31:03,586 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:31:08,576 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:31:08,577 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:31:08,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [105983088] [2023-12-02 17:31:08,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [105983088] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:31:08,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [458503095] [2023-12-02 17:31:08,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:08,577 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:31:08,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:31:08,578 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:31:08,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2023-12-02 17:31:08,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:08,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 17:31:08,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:31:09,600 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 17:31:09,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:31:11,409 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:31:11,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [458503095] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:31:11,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998059768] [2023-12-02 17:31:11,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:11,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:31:11,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:31:11,410 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:31:11,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-12-02 17:31:11,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:11,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-02 17:31:11,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:31:14,481 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 17:31:14,481 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:31:19,267 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-02 17:31:19,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998059768] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:31:19,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:31:19,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14, 15, 18, 19] total 41 [2023-12-02 17:31:19,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326327224] [2023-12-02 17:31:19,268 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:31:19,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-12-02 17:31:19,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:31:19,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-12-02 17:31:19,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1446, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 17:31:19,270 INFO L87 Difference]: Start difference. First operand 132 states and 177 transitions. Second operand has 41 states, 39 states have (on average 2.0) internal successors, (78), 41 states have internal predecessors, (78), 13 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 11 states have call predecessors, (16), 12 states have call successors, (16) [2023-12-02 17:31:34,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:31:34,910 INFO L93 Difference]: Finished difference Result 156 states and 202 transitions. [2023-12-02 17:31:34,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-02 17:31:34,911 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 2.0) internal successors, (78), 41 states have internal predecessors, (78), 13 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 11 states have call predecessors, (16), 12 states have call successors, (16) Word has length 73 [2023-12-02 17:31:34,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:31:34,912 INFO L225 Difference]: With dead ends: 156 [2023-12-02 17:31:34,912 INFO L226 Difference]: Without dead ends: 127 [2023-12-02 17:31:34,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=582, Invalid=3324, Unknown=0, NotChecked=0, Total=3906 [2023-12-02 17:31:34,915 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 189 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:31:34,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 850 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1150 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2023-12-02 17:31:34,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-12-02 17:31:34,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 118. [2023-12-02 17:31:34,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 86 states have (on average 1.1627906976744187) internal successors, (100), 88 states have internal predecessors, (100), 20 states have call successors, (20), 8 states have call predecessors, (20), 11 states have return successors, (36), 21 states have call predecessors, (36), 19 states have call successors, (36) [2023-12-02 17:31:34,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 156 transitions. [2023-12-02 17:31:34,932 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 156 transitions. Word has length 73 [2023-12-02 17:31:34,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:31:34,932 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 156 transitions. [2023-12-02 17:31:34,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 2.0) internal successors, (78), 41 states have internal predecessors, (78), 13 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 11 states have call predecessors, (16), 12 states have call successors, (16) [2023-12-02 17:31:34,932 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 156 transitions. [2023-12-02 17:31:34,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-02 17:31:34,934 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:31:34,934 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2023-12-02 17:31:34,937 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 17:31:35,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2023-12-02 17:31:35,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (59)] Forceful destruction successful, exit code 0 [2023-12-02 17:31:35,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 17:31:35,535 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:31:35,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:31:35,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1673613063, now seen corresponding path program 2 times [2023-12-02 17:31:35,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:31:35,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [204968477] [2023-12-02 17:31:35,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:31:35,536 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 [2023-12-02 17:31:35,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:31:35,536 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 17:31:35,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Waiting until timeout for monitored process [2023-12-02 17:31:35,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:31:35,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:31:35,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-02 17:31:35,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:31:39,442 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 17:31:39,442 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:31:49,174 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:31:49,175 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:31:49,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [204968477] [2023-12-02 17:31:49,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [204968477] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:31:49,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1942498304] [2023-12-02 17:31:49,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:31:49,175 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:31:49,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:31:49,176 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:31:49,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2023-12-02 17:31:49,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:31:49,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:31:49,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-02 17:31:49,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:31:50,329 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 17:31:50,330 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:31:53,223 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:31:53,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1942498304] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:31:53,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785111783] [2023-12-02 17:31:53,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:31:53,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:31:53,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:31:53,225 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:31:53,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-12-02 17:31:53,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:31:53,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:31:53,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 45 conjunts are in the unsatisfiable core [2023-12-02 17:31:53,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:32:00,006 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 17:32:00,006 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:32:23,554 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:32:23,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785111783] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:32:23,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:32:23,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18, 18, 22, 23] total 66 [2023-12-02 17:32:23,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871782661] [2023-12-02 17:32:23,556 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:32:23,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-12-02 17:32:23,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:32:23,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-12-02 17:32:23,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=541, Invalid=3749, Unknown=0, NotChecked=0, Total=4290 [2023-12-02 17:32:23,559 INFO L87 Difference]: Start difference. First operand 118 states and 156 transitions. Second operand has 66 states, 60 states have (on average 1.6333333333333333) internal successors, (98), 63 states have internal predecessors, (98), 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) [2023-12-02 17:33:03,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:33:03,795 INFO L93 Difference]: Finished difference Result 157 states and 197 transitions. [2023-12-02 17:33:03,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-12-02 17:33:03,796 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 60 states have (on average 1.6333333333333333) internal successors, (98), 63 states have internal predecessors, (98), 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 76 [2023-12-02 17:33:03,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:33:03,797 INFO L225 Difference]: With dead ends: 157 [2023-12-02 17:33:03,797 INFO L226 Difference]: Without dead ends: 137 [2023-12-02 17:33:03,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2076 ImplicationChecksByTransitivity, 56.7s TimeCoverageRelationStatistics Valid=1319, Invalid=7993, Unknown=0, NotChecked=0, Total=9312 [2023-12-02 17:33:03,801 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 269 mSDsluCounter, 1439 mSDsCounter, 0 mSdLazyCounter, 1799 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 1497 SdHoareTripleChecker+Invalid, 1925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.5s IncrementalHoareTripleChecker+Time [2023-12-02 17:33:03,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 1497 Invalid, 1925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1799 Invalid, 0 Unknown, 0 Unchecked, 17.5s Time] [2023-12-02 17:33:03,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-12-02 17:33:03,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 119. [2023-12-02 17:33:03,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 87 states have (on average 1.160919540229885) internal successors, (101), 89 states have internal predecessors, (101), 20 states have call successors, (20), 8 states have call predecessors, (20), 11 states have return successors, (34), 21 states have call predecessors, (34), 19 states have call successors, (34) [2023-12-02 17:33:03,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 155 transitions. [2023-12-02 17:33:03,821 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 155 transitions. Word has length 76 [2023-12-02 17:33:03,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:33:03,821 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 155 transitions. [2023-12-02 17:33:03,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 60 states have (on average 1.6333333333333333) internal successors, (98), 63 states have internal predecessors, (98), 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) [2023-12-02 17:33:03,822 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 155 transitions. [2023-12-02 17:33:03,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-12-02 17:33:03,822 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:33:03,822 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2023-12-02 17:33:03,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (62)] Forceful destruction successful, exit code 0 [2023-12-02 17:33:04,025 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Ended with exit code 0 [2023-12-02 17:33:04,228 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2023-12-02 17:33:04,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:33:04,423 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:33:04,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:33:04,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1420970373, now seen corresponding path program 2 times [2023-12-02 17:33:04,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:33:04,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [260383861] [2023-12-02 17:33:04,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:33:04,424 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 [2023-12-02 17:33:04,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:33:04,425 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 17:33:04,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2023-12-02 17:33:04,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:33:04,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:33:04,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 17:33:04,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:33:06,382 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 17:33:06,382 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:33:11,228 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:33:11,228 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:33:11,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [260383861] [2023-12-02 17:33:11,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [260383861] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:33:11,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1036261906] [2023-12-02 17:33:11,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:33:11,228 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:33:11,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:33:11,229 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:33:11,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (65)] Waiting until timeout for monitored process [2023-12-02 17:33:11,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:33:11,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:33:11,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 17:33:11,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:33:12,582 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 17:33:12,582 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:33:14,368 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:33:14,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1036261906] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:33:14,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632831678] [2023-12-02 17:33:14,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:33:14,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:33:14,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:33:14,370 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:33:14,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-12-02 17:33:14,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:33:14,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:33:14,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 17:33:14,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:33:15,097 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 17:33:15,097 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:33:16,839 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:33:16,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632831678] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:33:16,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:33:16,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15, 15, 14, 15] total 28 [2023-12-02 17:33:16,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282883974] [2023-12-02 17:33:16,839 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:33:16,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-02 17:33:16,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:33:16,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-02 17:33:16,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2023-12-02 17:33:16,841 INFO L87 Difference]: Start difference. First operand 119 states and 155 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 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) [2023-12-02 17:33:26,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:33:26,008 INFO L93 Difference]: Finished difference Result 132 states and 168 transitions. [2023-12-02 17:33:26,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 17:33:26,010 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 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 73 [2023-12-02 17:33:26,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:33:26,011 INFO L225 Difference]: With dead ends: 132 [2023-12-02 17:33:26,011 INFO L226 Difference]: Without dead ends: 105 [2023-12-02 17:33:26,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=393, Invalid=1769, Unknown=0, NotChecked=0, Total=2162 [2023-12-02 17:33:26,013 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 116 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-12-02 17:33:26,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 925 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-12-02 17:33:26,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-12-02 17:33:26,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2023-12-02 17:33:26,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 76 states have (on average 1.1710526315789473) internal successors, (89), 78 states have internal predecessors, (89), 18 states have call successors, (18), 7 states have call predecessors, (18), 10 states have return successors, (31), 19 states have call predecessors, (31), 17 states have call successors, (31) [2023-12-02 17:33:26,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 138 transitions. [2023-12-02 17:33:26,033 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 138 transitions. Word has length 73 [2023-12-02 17:33:26,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:33:26,033 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 138 transitions. [2023-12-02 17:33:26,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 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) [2023-12-02 17:33:26,033 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 138 transitions. [2023-12-02 17:33:26,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-12-02 17:33:26,034 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:33:26,035 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2023-12-02 17:33:26,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2023-12-02 17:33:26,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (65)] Ended with exit code 0 [2023-12-02 17:33:26,438 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Ended with exit code 0 [2023-12-02 17:33:26,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:33:26,636 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:33:26,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:33:26,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1801579024, now seen corresponding path program 1 times [2023-12-02 17:33:26,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:33:26,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1320965636] [2023-12-02 17:33:26,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:33:26,636 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 [2023-12-02 17:33:26,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:33:26,637 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 17:33:26,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2023-12-02 17:33:26,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:33:26,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 17:33:26,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:33:27,473 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:33:27,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:33:28,814 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:33:28,814 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:33:28,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1320965636] [2023-12-02 17:33:28,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1320965636] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:33:28,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [265531571] [2023-12-02 17:33:28,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:33:28,814 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:33:28,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:33:28,816 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:33:28,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (68)] Waiting until timeout for monitored process [2023-12-02 17:33:28,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:33:28,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 17:33:28,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:33:29,246 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:33:29,246 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:33:29,997 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:33:29,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [265531571] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:33:29,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27288138] [2023-12-02 17:33:29,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:33:29,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:33:29,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:33:29,999 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:33:30,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2023-12-02 17:33:30,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:33:30,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 17:33:30,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:33:30,375 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:33:30,375 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:33:31,136 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:33:31,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27288138] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:33:31,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:33:31,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 15 [2023-12-02 17:33:31,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388580460] [2023-12-02 17:33:31,136 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:33:31,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 17:33:31,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:33:31,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 17:33:31,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-12-02 17:33:31,138 INFO L87 Difference]: Start difference. First operand 105 states and 138 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 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) [2023-12-02 17:33:33,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:33:33,123 INFO L93 Difference]: Finished difference Result 114 states and 146 transitions. [2023-12-02 17:33:33,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 17:33:33,124 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 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 77 [2023-12-02 17:33:33,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:33:33,126 INFO L225 Difference]: With dead ends: 114 [2023-12-02 17:33:33,126 INFO L226 Difference]: Without dead ends: 101 [2023-12-02 17:33:33,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 443 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2023-12-02 17:33:33,127 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 99 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:33:33,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 489 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-02 17:33:33,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-12-02 17:33:33,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2023-12-02 17:33:33,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 73 states have (on average 1.178082191780822) internal successors, (86), 76 states have internal predecessors, (86), 17 states have call successors, (17), 6 states have call predecessors, (17), 10 states have return successors, (29), 18 states have call predecessors, (29), 16 states have call successors, (29) [2023-12-02 17:33:33,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 132 transitions. [2023-12-02 17:33:33,144 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 132 transitions. Word has length 77 [2023-12-02 17:33:33,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:33:33,144 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 132 transitions. [2023-12-02 17:33:33,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 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) [2023-12-02 17:33:33,144 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 132 transitions. [2023-12-02 17:33:33,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-02 17:33:33,145 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:33:33,145 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2023-12-02 17:33:33,148 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Ended with exit code 0 [2023-12-02 17:33:33,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2023-12-02 17:33:33,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (68)] Forceful destruction successful, exit code 0 [2023-12-02 17:33:33,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 17:33:33,746 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:33:33,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:33:33,746 INFO L85 PathProgramCache]: Analyzing trace with hash 67327611, now seen corresponding path program 1 times [2023-12-02 17:33:33,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:33:33,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1797425424] [2023-12-02 17:33:33,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:33:33,747 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 [2023-12-02 17:33:33,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:33:33,748 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 17:33:33,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Waiting until timeout for monitored process [2023-12-02 17:33:33,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:33:33,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-02 17:33:33,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:33:37,608 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 17:33:37,608 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:33:46,340 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:33:46,340 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:33:46,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1797425424] [2023-12-02 17:33:46,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1797425424] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:33:46,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [956695636] [2023-12-02 17:33:46,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:33:46,341 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:33:46,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:33:46,342 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:33:46,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (71)] Waiting until timeout for monitored process [2023-12-02 17:33:46,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:33:46,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 39 conjunts are in the unsatisfiable core [2023-12-02 17:33:46,519 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:33:51,909 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 17:33:51,909 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:34:02,989 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:34:02,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [956695636] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:34:02,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819573922] [2023-12-02 17:34:02,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:34:02,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:34:02,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:34:02,990 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:34:02,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2023-12-02 17:34:03,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:34:03,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-02 17:34:03,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:34:06,154 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 17:34:06,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:34:16,182 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:34:16,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819573922] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:34:16,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:34:16,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 21, 21, 22, 24] total 64 [2023-12-02 17:34:16,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650143130] [2023-12-02 17:34:16,182 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:34:16,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-12-02 17:34:16,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:34:16,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-12-02 17:34:16,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=3645, Unknown=0, NotChecked=0, Total=4032 [2023-12-02 17:34:16,185 INFO L87 Difference]: Start difference. First operand 101 states and 132 transitions. Second operand has 64 states, 58 states have (on average 1.6379310344827587) internal successors, (95), 61 states have internal predecessors, (95), 16 states have call successors, (19), 2 states have call predecessors, (19), 8 states have return successors, (23), 18 states have call predecessors, (23), 15 states have call successors, (23) [2023-12-02 17:34:55,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:34:55,518 INFO L93 Difference]: Finished difference Result 142 states and 178 transitions. [2023-12-02 17:34:55,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-12-02 17:34:55,520 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 58 states have (on average 1.6379310344827587) internal successors, (95), 61 states have internal predecessors, (95), 16 states have call successors, (19), 2 states have call predecessors, (19), 8 states have return successors, (23), 18 states have call predecessors, (23), 15 states have call successors, (23) Word has length 74 [2023-12-02 17:34:55,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:34:55,521 INFO L225 Difference]: With dead ends: 142 [2023-12-02 17:34:55,521 INFO L226 Difference]: Without dead ends: 123 [2023-12-02 17:34:55,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 375 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2444 ImplicationChecksByTransitivity, 50.8s TimeCoverageRelationStatistics Valid=1340, Invalid=9166, Unknown=0, NotChecked=0, Total=10506 [2023-12-02 17:34:55,524 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 144 mSDsluCounter, 1291 mSDsCounter, 0 mSdLazyCounter, 1866 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 1345 SdHoareTripleChecker+Invalid, 1910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.6s IncrementalHoareTripleChecker+Time [2023-12-02 17:34:55,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 1345 Invalid, 1910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1866 Invalid, 0 Unknown, 0 Unchecked, 16.6s Time] [2023-12-02 17:34:55,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-12-02 17:34:55,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 111. [2023-12-02 17:34:55,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 82 states have (on average 1.170731707317073) internal successors, (96), 84 states have internal predecessors, (96), 18 states have call successors, (18), 7 states have call predecessors, (18), 10 states have return successors, (28), 19 states have call predecessors, (28), 17 states have call successors, (28) [2023-12-02 17:34:55,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 142 transitions. [2023-12-02 17:34:55,551 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 142 transitions. Word has length 74 [2023-12-02 17:34:55,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:34:55,551 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 142 transitions. [2023-12-02 17:34:55,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 58 states have (on average 1.6379310344827587) internal successors, (95), 61 states have internal predecessors, (95), 16 states have call successors, (19), 2 states have call predecessors, (19), 8 states have return successors, (23), 18 states have call predecessors, (23), 15 states have call successors, (23) [2023-12-02 17:34:55,552 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 142 transitions. [2023-12-02 17:34:55,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-12-02 17:34:55,553 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:34:55,553 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2023-12-02 17:34:55,558 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2023-12-02 17:34:55,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (71)] Ended with exit code 0 [2023-12-02 17:34:55,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Ended with exit code 0 [2023-12-02 17:34:56,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:34:56,154 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:34:56,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:34:56,154 INFO L85 PathProgramCache]: Analyzing trace with hash 754096496, now seen corresponding path program 2 times [2023-12-02 17:34:56,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:34:56,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1124956059] [2023-12-02 17:34:56,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:34:56,155 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 [2023-12-02 17:34:56,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:34:56,156 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 17:34:56,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2023-12-02 17:34:56,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:34:56,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:34:56,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 17:34:56,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:34:57,067 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:34:57,067 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:34:58,506 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:34:58,506 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:34:58,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1124956059] [2023-12-02 17:34:58,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1124956059] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:34:58,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [35903762] [2023-12-02 17:34:58,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:34:58,507 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:34:58,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:34:58,508 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:34:58,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (74)] Waiting until timeout for monitored process [2023-12-02 17:34:58,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:34:58,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:34:58,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 17:34:58,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:34:59,027 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:34:59,028 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:34:59,863 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:34:59,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [35903762] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:34:59,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676367729] [2023-12-02 17:34:59,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:34:59,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:34:59,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:34:59,864 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:34:59,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2023-12-02 17:34:59,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:34:59,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:34:59,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 17:34:59,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:35:00,277 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:35:00,278 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:35:01,076 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:35:01,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676367729] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:35:01,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:35:01,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 15 [2023-12-02 17:35:01,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515817740] [2023-12-02 17:35:01,077 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:35:01,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 17:35:01,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:35:01,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 17:35:01,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-12-02 17:35:01,079 INFO L87 Difference]: Start difference. First operand 111 states and 142 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 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) [2023-12-02 17:35:03,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:35:03,233 INFO L93 Difference]: Finished difference Result 118 states and 148 transitions. [2023-12-02 17:35:03,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 17:35:03,234 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 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 77 [2023-12-02 17:35:03,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:35:03,235 INFO L225 Difference]: With dead ends: 118 [2023-12-02 17:35:03,235 INFO L226 Difference]: Without dead ends: 96 [2023-12-02 17:35:03,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 443 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2023-12-02 17:35:03,236 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 93 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-02 17:35:03,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 528 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-02 17:35:03,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-12-02 17:35:03,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 88. [2023-12-02 17:35:03,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 63 states have (on average 1.1746031746031746) internal successors, (74), 66 states have internal predecessors, (74), 15 states have call successors, (15), 6 states have call predecessors, (15), 9 states have return successors, (23), 15 states have call predecessors, (23), 14 states have call successors, (23) [2023-12-02 17:35:03,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 112 transitions. [2023-12-02 17:35:03,251 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 112 transitions. Word has length 77 [2023-12-02 17:35:03,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:35:03,252 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 112 transitions. [2023-12-02 17:35:03,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 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) [2023-12-02 17:35:03,252 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 112 transitions. [2023-12-02 17:35:03,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-02 17:35:03,253 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:35:03,253 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2023-12-02 17:35:03,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2023-12-02 17:35:03,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (74)] Ended with exit code 0 [2023-12-02 17:35:03,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Ended with exit code 0 [2023-12-02 17:35:03,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:35:03,854 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:35:03,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:35:03,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1890205239, now seen corresponding path program 2 times [2023-12-02 17:35:03,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:35:03,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [116926659] [2023-12-02 17:35:03,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:35:03,855 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 [2023-12-02 17:35:03,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:35:03,856 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 17:35:03,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2023-12-02 17:35:04,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:35:04,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:35:04,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-02 17:35:04,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:35:08,080 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 17:35:08,080 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:35:17,797 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:35:17,797 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:35:17,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [116926659] [2023-12-02 17:35:17,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [116926659] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:35:17,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [262014397] [2023-12-02 17:35:17,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:35:17,798 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:35:17,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:35:17,799 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:35:17,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (77)] Waiting until timeout for monitored process [2023-12-02 17:35:18,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:35:18,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:35:18,015 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-02 17:35:18,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:35:24,916 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 17:35:24,916 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:35:38,105 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:35:38,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [262014397] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:35:38,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230288395] [2023-12-02 17:35:38,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:35:38,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:35:38,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:35:38,107 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:35:38,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2023-12-02 17:35:38,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:35:38,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:35:38,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 43 conjunts are in the unsatisfiable core [2023-12-02 17:35:38,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:35:40,393 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 17:35:40,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:35:46,974 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:35:46,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230288395] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:35:46,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:35:46,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 22, 24, 22, 23] total 62 [2023-12-02 17:35:46,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523915596] [2023-12-02 17:35:46,975 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:35:46,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-12-02 17:35:46,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:35:46,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-12-02 17:35:46,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=3413, Unknown=0, NotChecked=0, Total=3782 [2023-12-02 17:35:46,977 INFO L87 Difference]: Start difference. First operand 88 states and 112 transitions. Second operand has 62 states, 56 states have (on average 1.6607142857142858) internal successors, (93), 59 states have internal predecessors, (93), 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) [2023-12-02 17:36:24,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:36:24,020 INFO L93 Difference]: Finished difference Result 124 states and 153 transitions. [2023-12-02 17:36:24,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-12-02 17:36:24,021 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 56 states have (on average 1.6607142857142858) internal successors, (93), 59 states have internal predecessors, (93), 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 74 [2023-12-02 17:36:24,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:36:24,022 INFO L225 Difference]: With dead ends: 124 [2023-12-02 17:36:24,022 INFO L226 Difference]: Without dead ends: 105 [2023-12-02 17:36:24,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2120 ImplicationChecksByTransitivity, 51.4s TimeCoverageRelationStatistics Valid=1272, Invalid=8430, Unknown=0, NotChecked=0, Total=9702 [2023-12-02 17:36:24,024 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 220 mSDsluCounter, 1213 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 1266 SdHoareTripleChecker+Invalid, 1650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:36:24,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 1266 Invalid, 1650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1553 Invalid, 0 Unknown, 0 Unchecked, 13.8s Time] [2023-12-02 17:36:24,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-12-02 17:36:24,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 88. [2023-12-02 17:36:24,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 64 states have (on average 1.15625) internal successors, (74), 65 states have internal predecessors, (74), 15 states have call successors, (15), 7 states have call predecessors, (15), 8 states have return successors, (21), 15 states have call predecessors, (21), 14 states have call successors, (21) [2023-12-02 17:36:24,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 110 transitions. [2023-12-02 17:36:24,039 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 110 transitions. Word has length 74 [2023-12-02 17:36:24,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:36:24,040 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 110 transitions. [2023-12-02 17:36:24,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 56 states have (on average 1.6607142857142858) internal successors, (93), 59 states have internal predecessors, (93), 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) [2023-12-02 17:36:24,040 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 110 transitions. [2023-12-02 17:36:24,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-12-02 17:36:24,041 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:36:24,041 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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] [2023-12-02 17:36:24,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2023-12-02 17:36:24,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (77)] Forceful destruction successful, exit code 0 [2023-12-02 17:36:24,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Forceful destruction successful, exit code 0 [2023-12-02 17:36:24,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:36:24,642 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:36:24,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:36:24,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1065302635, now seen corresponding path program 1 times [2023-12-02 17:36:24,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:36:24,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [703047780] [2023-12-02 17:36:24,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:36:24,643 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 [2023-12-02 17:36:24,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:36:24,644 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 17:36:24,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Waiting until timeout for monitored process [2023-12-02 17:36:25,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:36:25,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 44 conjunts are in the unsatisfiable core [2023-12-02 17:36:25,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:36:32,860 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-02 17:36:32,860 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:36:55,981 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-02 17:36:55,982 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:36:55,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [703047780] [2023-12-02 17:36:55,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [703047780] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:36:55,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1529047758] [2023-12-02 17:36:55,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:36:55,982 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:36:55,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:36:55,983 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:36:55,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (80)] Waiting until timeout for monitored process [2023-12-02 17:36:56,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:36:56,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 44 conjunts are in the unsatisfiable core [2023-12-02 17:36:56,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:36:58,022 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-02 17:36:58,022 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:37:02,875 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-02 17:37:02,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1529047758] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:37:02,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197785598] [2023-12-02 17:37:02,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:37:02,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:37:02,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:37:02,876 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:37:02,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2023-12-02 17:37:03,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:37:03,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 52 conjunts are in the unsatisfiable core [2023-12-02 17:37:03,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:37:05,262 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-02 17:37:05,262 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:37:10,331 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-02 17:37:10,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197785598] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:37:10,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:37:10,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 24, 23, 24, 23] total 45 [2023-12-02 17:37:10,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443057427] [2023-12-02 17:37:10,332 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:37:10,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-12-02 17:37:10,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:37:10,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-12-02 17:37:10,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1791, Unknown=0, NotChecked=0, Total=1980 [2023-12-02 17:37:10,335 INFO L87 Difference]: Start difference. First operand 88 states and 110 transitions. Second operand has 45 states, 39 states have (on average 1.641025641025641) internal successors, (64), 41 states have internal predecessors, (64), 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) [2023-12-02 17:37:16,722 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 17:37:18,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 17:37:36,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 17:37:37,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 17:37:38,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 17:37:40,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 17:37:41,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 17:37:56,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:37:56,555 INFO L93 Difference]: Finished difference Result 103 states and 125 transitions. [2023-12-02 17:37:56,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-12-02 17:37:56,557 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 39 states have (on average 1.641025641025641) internal successors, (64), 41 states have internal predecessors, (64), 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 79 [2023-12-02 17:37:56,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:37:56,558 INFO L225 Difference]: With dead ends: 103 [2023-12-02 17:37:56,558 INFO L226 Difference]: Without dead ends: 96 [2023-12-02 17:37:56,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 424 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 48.5s TimeCoverageRelationStatistics Valid=548, Invalid=4563, Unknown=1, NotChecked=0, Total=5112 [2023-12-02 17:37:56,560 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 110 mSDsluCounter, 1174 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 1227 SdHoareTripleChecker+Invalid, 1279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:37:56,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 1227 Invalid, 1279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 21.8s Time] [2023-12-02 17:37:56,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-12-02 17:37:56,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 88. [2023-12-02 17:37:56,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 64 states have (on average 1.15625) internal successors, (74), 65 states have internal predecessors, (74), 15 states have call successors, (15), 7 states have call predecessors, (15), 8 states have return successors, (20), 15 states have call predecessors, (20), 14 states have call successors, (20) [2023-12-02 17:37:56,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2023-12-02 17:37:56,577 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 79 [2023-12-02 17:37:56,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:37:56,578 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2023-12-02 17:37:56,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 39 states have (on average 1.641025641025641) internal successors, (64), 41 states have internal predecessors, (64), 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) [2023-12-02 17:37:56,578 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2023-12-02 17:37:56,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-12-02 17:37:56,579 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:37:56,579 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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] [2023-12-02 17:37:56,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Ended with exit code 0 [2023-12-02 17:37:56,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2023-12-02 17:37:56,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (80)] Forceful destruction successful, exit code 0 [2023-12-02 17:37:57,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 17:37:57,180 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:37:57,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:37:57,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1142860967, now seen corresponding path program 2 times [2023-12-02 17:37:57,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:37:57,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1441340236] [2023-12-02 17:37:57,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:37:57,181 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 [2023-12-02 17:37:57,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:37:57,182 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 17:37:57,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_289eb14d-2479-488e-a86f-e580d21ac04e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2023-12-02 17:37:57,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:37:57,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:37:57,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 44 conjunts are in the unsatisfiable core [2023-12-02 17:37:57,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:38:05,329 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-02 17:38:05,330 INFO L327 TraceCheckSpWp]: Computing backward predicates...