./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/square_8+soft_float_4-3a.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_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/square_8+soft_float_4-3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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 3a1b0d13ed57f2c287b7c5c279f90464e92ac535bf47194a470e4f6c38d6c07a --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 14:14:28,079 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 14:14:28,147 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 14:14:28,152 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 14:14:28,153 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 14:14:28,179 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 14:14:28,180 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 14:14:28,180 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 14:14:28,181 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 14:14:28,181 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 14:14:28,182 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 14:14:28,182 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 14:14:28,183 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 14:14:28,183 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 14:14:28,184 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 14:14:28,184 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 14:14:28,185 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 14:14:28,185 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 14:14:28,186 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 14:14:28,186 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 14:14:28,187 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 14:14:28,188 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 14:14:28,188 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 14:14:28,189 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 14:14:28,189 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 14:14:28,190 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 14:14:28,190 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 14:14:28,190 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 14:14:28,191 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 14:14:28,191 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 14:14:28,191 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 14:14:28,192 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 14:14:28,192 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 14:14:28,193 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 14:14:28,193 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 14:14:28,193 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 14:14:28,193 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 14:14:28,194 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:14:28,194 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 14:14:28,194 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 14:14:28,194 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 14:14:28,195 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 14:14:28,195 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 14:14:28,195 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 14:14:28,195 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 14:14:28,196 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 14:14:28,196 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 14:14:28,196 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_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a1b0d13ed57f2c287b7c5c279f90464e92ac535bf47194a470e4f6c38d6c07a [2023-12-02 14:14:28,408 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 14:14:28,429 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 14:14:28,431 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 14:14:28,432 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 14:14:28,433 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 14:14:28,434 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/combinations/square_8+soft_float_4-3a.c.cil.c [2023-12-02 14:14:31,204 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 14:14:31,398 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 14:14:31,399 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/sv-benchmarks/c/combinations/square_8+soft_float_4-3a.c.cil.c [2023-12-02 14:14:31,406 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/data/237d7c071/307c044820844031a87823c2417024e3/FLAG6f163d061 [2023-12-02 14:14:31,417 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/data/237d7c071/307c044820844031a87823c2417024e3 [2023-12-02 14:14:31,419 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 14:14:31,420 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 14:14:31,422 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 14:14:31,422 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 14:14:31,427 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 14:14:31,428 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:14:31" (1/1) ... [2023-12-02 14:14:31,429 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c7ea787 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:14:31, skipping insertion in model container [2023-12-02 14:14:31,429 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:14:31" (1/1) ... [2023-12-02 14:14:31,462 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 14:14:31,615 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_fa0fd86f-452d-4182-a0e5-6da56e53c03b/sv-benchmarks/c/combinations/square_8+soft_float_4-3a.c.cil.c[1995,2008] [2023-12-02 14:14:31,621 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_fa0fd86f-452d-4182-a0e5-6da56e53c03b/sv-benchmarks/c/combinations/square_8+soft_float_4-3a.c.cil.c[2364,2377] [2023-12-02 14:14:31,659 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:14:31,667 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 14:14:31,681 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_fa0fd86f-452d-4182-a0e5-6da56e53c03b/sv-benchmarks/c/combinations/square_8+soft_float_4-3a.c.cil.c[1995,2008] [2023-12-02 14:14:31,683 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_fa0fd86f-452d-4182-a0e5-6da56e53c03b/sv-benchmarks/c/combinations/square_8+soft_float_4-3a.c.cil.c[2364,2377] [2023-12-02 14:14:31,711 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:14:31,727 INFO L206 MainTranslator]: Completed translation [2023-12-02 14:14:31,728 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:14:31 WrapperNode [2023-12-02 14:14:31,728 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 14:14:31,729 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 14:14:31,729 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 14:14:31,729 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 14:14:31,737 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:14:31" (1/1) ... [2023-12-02 14:14:31,747 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:14:31" (1/1) ... [2023-12-02 14:14:31,769 INFO L138 Inliner]: procedures = 27, calls = 20, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 79 [2023-12-02 14:14:31,769 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 14:14:31,770 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 14:14:31,770 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 14:14:31,770 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 14:14:31,779 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:14:31" (1/1) ... [2023-12-02 14:14:31,780 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:14:31" (1/1) ... [2023-12-02 14:14:31,782 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:14:31" (1/1) ... [2023-12-02 14:14:31,783 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:14:31" (1/1) ... [2023-12-02 14:14:31,790 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:14:31" (1/1) ... [2023-12-02 14:14:31,796 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:14:31" (1/1) ... [2023-12-02 14:14:31,798 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:14:31" (1/1) ... [2023-12-02 14:14:31,800 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:14:31" (1/1) ... [2023-12-02 14:14:31,803 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 14:14:31,804 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 14:14:31,804 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 14:14:31,804 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 14:14:31,805 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:14:31" (1/1) ... [2023-12-02 14:14:31,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:14:31,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:14:31,835 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 14:14:31,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 14:14:31,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 14:14:31,872 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-12-02 14:14:31,872 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-12-02 14:14:31,872 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2023-12-02 14:14:31,872 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2023-12-02 14:14:31,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 14:14:31,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 14:14:31,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 14:14:31,873 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 14:14:31,873 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 14:14:31,944 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 14:14:31,946 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 14:14:32,237 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 14:14:32,366 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 14:14:32,366 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-02 14:14:32,368 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:14:32 BoogieIcfgContainer [2023-12-02 14:14:32,368 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 14:14:32,371 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 14:14:32,371 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 14:14:32,373 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 14:14:32,374 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 02:14:31" (1/3) ... [2023-12-02 14:14:32,374 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5073dfc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:14:32, skipping insertion in model container [2023-12-02 14:14:32,375 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:14:31" (2/3) ... [2023-12-02 14:14:32,375 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5073dfc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:14:32, skipping insertion in model container [2023-12-02 14:14:32,375 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:14:32" (3/3) ... [2023-12-02 14:14:32,376 INFO L112 eAbstractionObserver]: Analyzing ICFG square_8+soft_float_4-3a.c.cil.c [2023-12-02 14:14:32,391 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 14:14:32,391 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-02 14:14:32,433 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 14:14:32,439 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;@62a19432, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 14:14:32,439 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-02 14:14:32,443 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 38 states have internal predecessors, (53), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 14:14:32,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-12-02 14:14:32,448 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:14:32,449 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-12-02 14:14:32,449 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:14:32,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:14:32,454 INFO L85 PathProgramCache]: Analyzing trace with hash 9025101, now seen corresponding path program 1 times [2023-12-02 14:14:32,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:14:32,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471193641] [2023-12-02 14:14:32,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:14:32,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:14:32,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 14:14:32,533 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 14:14:32,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 14:14:32,557 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 14:14:32,558 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 14:14:32,560 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-12-02 14:14:32,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-12-02 14:14:32,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 14:14:32,565 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-12-02 14:14:32,569 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-12-02 14:14:32,585 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 02:14:32 BoogieIcfgContainer [2023-12-02 14:14:32,585 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-02 14:14:32,586 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 14:14:32,586 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 14:14:32,586 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 14:14:32,587 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:14:32" (3/4) ... [2023-12-02 14:14:32,589 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-12-02 14:14:32,591 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 14:14:32,592 INFO L158 Benchmark]: Toolchain (without parser) took 1171.46ms. Allocated memory is still 159.4MB. Free memory was 115.3MB in the beginning and 91.0MB in the end (delta: 24.3MB). Peak memory consumption was 25.9MB. Max. memory is 16.1GB. [2023-12-02 14:14:32,592 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 111.1MB. Free memory is still 58.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 14:14:32,593 INFO L158 Benchmark]: CACSL2BoogieTranslator took 306.58ms. Allocated memory is still 159.4MB. Free memory was 115.3MB in the beginning and 101.2MB in the end (delta: 14.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-12-02 14:14:32,593 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.53ms. Allocated memory is still 159.4MB. Free memory was 101.2MB in the beginning and 99.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 14:14:32,594 INFO L158 Benchmark]: Boogie Preprocessor took 32.80ms. Allocated memory is still 159.4MB. Free memory was 99.6MB in the beginning and 98.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 14:14:32,595 INFO L158 Benchmark]: RCFGBuilder took 564.83ms. Allocated memory is still 159.4MB. Free memory was 98.0MB in the beginning and 105.7MB in the end (delta: -7.7MB). Peak memory consumption was 17.6MB. Max. memory is 16.1GB. [2023-12-02 14:14:32,595 INFO L158 Benchmark]: TraceAbstraction took 214.57ms. Allocated memory is still 159.4MB. Free memory was 104.7MB in the beginning and 91.0MB in the end (delta: 13.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-12-02 14:14:32,596 INFO L158 Benchmark]: Witness Printer took 4.85ms. Allocated memory is still 159.4MB. Free memory is still 91.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 14:14:32,599 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 111.1MB. Free memory is still 58.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 306.58ms. Allocated memory is still 159.4MB. Free memory was 115.3MB in the beginning and 101.2MB in the end (delta: 14.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 40.53ms. Allocated memory is still 159.4MB. Free memory was 101.2MB in the beginning and 99.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.80ms. Allocated memory is still 159.4MB. Free memory was 99.6MB in the beginning and 98.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 564.83ms. Allocated memory is still 159.4MB. Free memory was 98.0MB in the beginning and 105.7MB in the end (delta: -7.7MB). Peak memory consumption was 17.6MB. Max. memory is 16.1GB. * TraceAbstraction took 214.57ms. Allocated memory is still 159.4MB. Free memory was 104.7MB in the beginning and 91.0MB in the end (delta: 13.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Witness Printer took 4.85ms. Allocated memory is still 159.4MB. Free memory is still 91.0MB. 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: [L309] COND TRUE __VERIFIER_nondet_int() [L310] 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: 60]: 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, 51 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.1s, 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=51occurred 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 14:14:32,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/square_8+soft_float_4-3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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 3a1b0d13ed57f2c287b7c5c279f90464e92ac535bf47194a470e4f6c38d6c07a --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 14:14:34,548 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 14:14:34,627 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2023-12-02 14:14:34,633 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 14:14:34,634 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 14:14:34,662 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 14:14:34,663 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 14:14:34,664 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 14:14:34,664 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 14:14:34,665 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 14:14:34,666 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 14:14:34,666 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 14:14:34,667 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 14:14:34,667 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 14:14:34,668 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 14:14:34,668 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 14:14:34,669 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 14:14:34,670 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 14:14:34,670 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 14:14:34,671 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 14:14:34,672 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 14:14:34,672 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 14:14:34,673 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 14:14:34,673 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 14:14:34,674 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 14:14:34,674 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-02 14:14:34,674 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-02 14:14:34,675 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 14:14:34,675 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 14:14:34,676 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 14:14:34,676 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 14:14:34,677 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-02 14:14:34,677 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 14:14:34,677 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 14:14:34,677 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:14:34,678 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 14:14:34,678 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 14:14:34,678 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 14:14:34,678 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-12-02 14:14:34,679 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-02 14:14:34,679 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 14:14:34,679 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 14:14:34,679 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 14:14:34,680 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 14:14:34,680 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_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a1b0d13ed57f2c287b7c5c279f90464e92ac535bf47194a470e4f6c38d6c07a [2023-12-02 14:14:34,983 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 14:14:35,003 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 14:14:35,006 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 14:14:35,007 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 14:14:35,008 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 14:14:35,009 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/combinations/square_8+soft_float_4-3a.c.cil.c [2023-12-02 14:14:37,814 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 14:14:38,039 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 14:14:38,040 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/sv-benchmarks/c/combinations/square_8+soft_float_4-3a.c.cil.c [2023-12-02 14:14:38,051 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/data/1464b8843/68d5c0807daa4a5fa70592f921f4f3a6/FLAG100b89aa6 [2023-12-02 14:14:38,066 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/data/1464b8843/68d5c0807daa4a5fa70592f921f4f3a6 [2023-12-02 14:14:38,068 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 14:14:38,070 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 14:14:38,071 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 14:14:38,072 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 14:14:38,077 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 14:14:38,077 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:14:38" (1/1) ... [2023-12-02 14:14:38,079 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4291114 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:14:38, skipping insertion in model container [2023-12-02 14:14:38,079 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:14:38" (1/1) ... [2023-12-02 14:14:38,115 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 14:14:38,281 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_fa0fd86f-452d-4182-a0e5-6da56e53c03b/sv-benchmarks/c/combinations/square_8+soft_float_4-3a.c.cil.c[1995,2008] [2023-12-02 14:14:38,288 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_fa0fd86f-452d-4182-a0e5-6da56e53c03b/sv-benchmarks/c/combinations/square_8+soft_float_4-3a.c.cil.c[2364,2377] [2023-12-02 14:14:38,327 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:14:38,341 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 14:14:38,357 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_fa0fd86f-452d-4182-a0e5-6da56e53c03b/sv-benchmarks/c/combinations/square_8+soft_float_4-3a.c.cil.c[1995,2008] [2023-12-02 14:14:38,359 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_fa0fd86f-452d-4182-a0e5-6da56e53c03b/sv-benchmarks/c/combinations/square_8+soft_float_4-3a.c.cil.c[2364,2377] [2023-12-02 14:14:38,383 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:14:38,400 INFO L206 MainTranslator]: Completed translation [2023-12-02 14:14:38,401 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:14:38 WrapperNode [2023-12-02 14:14:38,401 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 14:14:38,402 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 14:14:38,403 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 14:14:38,403 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 14:14:38,410 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:14:38" (1/1) ... [2023-12-02 14:14:38,423 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:14:38" (1/1) ... [2023-12-02 14:14:38,445 INFO L138 Inliner]: procedures = 28, calls = 20, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 75 [2023-12-02 14:14:38,446 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 14:14:38,447 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 14:14:38,447 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 14:14:38,447 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 14:14:38,456 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:14:38" (1/1) ... [2023-12-02 14:14:38,457 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:14:38" (1/1) ... [2023-12-02 14:14:38,461 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:14:38" (1/1) ... [2023-12-02 14:14:38,462 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:14:38" (1/1) ... [2023-12-02 14:14:38,471 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:14:38" (1/1) ... [2023-12-02 14:14:38,475 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:14:38" (1/1) ... [2023-12-02 14:14:38,478 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:14:38" (1/1) ... [2023-12-02 14:14:38,480 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:14:38" (1/1) ... [2023-12-02 14:14:38,484 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 14:14:38,485 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 14:14:38,485 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 14:14:38,485 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 14:14:38,486 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:14:38" (1/1) ... [2023-12-02 14:14:38,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:14:38,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:14:38,516 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 14:14:38,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 14:14:38,549 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 14:14:38,549 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-12-02 14:14:38,550 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-12-02 14:14:38,550 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-12-02 14:14:38,550 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2023-12-02 14:14:38,550 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2023-12-02 14:14:38,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 14:14:38,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 14:14:38,551 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 14:14:38,551 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 14:14:38,645 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 14:14:38,647 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 14:14:41,063 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 14:14:41,090 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 14:14:41,090 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-02 14:14:41,090 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:14:41 BoogieIcfgContainer [2023-12-02 14:14:41,090 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 14:14:41,093 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 14:14:41,093 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 14:14:41,096 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 14:14:41,096 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 02:14:38" (1/3) ... [2023-12-02 14:14:41,096 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@608589c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:14:41, skipping insertion in model container [2023-12-02 14:14:41,096 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:14:38" (2/3) ... [2023-12-02 14:14:41,097 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@608589c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:14:41, skipping insertion in model container [2023-12-02 14:14:41,097 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:14:41" (3/3) ... [2023-12-02 14:14:41,098 INFO L112 eAbstractionObserver]: Analyzing ICFG square_8+soft_float_4-3a.c.cil.c [2023-12-02 14:14:41,114 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 14:14:41,114 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-02 14:14:41,155 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 14:14:41,160 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;@ad57857, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 14:14:41,161 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-02 14:14:41,164 INFO L276 IsEmpty]: Start isEmpty. Operand has 57 states, 42 states have (on average 1.5476190476190477) internal successors, (65), 44 states have internal predecessors, (65), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 14:14:41,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 14:14:41,170 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:14:41,170 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-02 14:14:41,171 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:14:41,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:14:41,176 INFO L85 PathProgramCache]: Analyzing trace with hash 2011176783, now seen corresponding path program 1 times [2023-12-02 14:14:41,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:14:41,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1174071763] [2023-12-02 14:14:41,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:14:41,186 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 14:14:41,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:14:41,187 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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 14:14:41,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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 14:14:41,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:14:41,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-02 14:14:41,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:14:41,677 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 14:14:41,677 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:14:41,678 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:14:41,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1174071763] [2023-12-02 14:14:41,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1174071763] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:14:41,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:14:41,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 14:14:41,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435387925] [2023-12-02 14:14:41,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:14:41,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 14:14:41,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:14:41,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 14:14:41,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 14:14:41,713 INFO L87 Difference]: Start difference. First operand has 57 states, 42 states have (on average 1.5476190476190477) internal successors, (65), 44 states have internal predecessors, (65), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) 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 14:14:41,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:14:41,769 INFO L93 Difference]: Finished difference Result 110 states and 168 transitions. [2023-12-02 14:14:41,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 14:14:41,771 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 14:14:41,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:14:41,780 INFO L225 Difference]: With dead ends: 110 [2023-12-02 14:14:41,780 INFO L226 Difference]: Without dead ends: 53 [2023-12-02 14:14:41,784 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 14:14:41,787 INFO L413 NwaCegarLoop]: 70 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, 70 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 14:14:41,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 70 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 14:14:41,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-12-02 14:14:41,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-12-02 14:14:41,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 41 states have internal predecessors, (54), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 14:14:41,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 71 transitions. [2023-12-02 14:14:41,829 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 71 transitions. Word has length 6 [2023-12-02 14:14:41,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:14:41,830 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 71 transitions. [2023-12-02 14:14:41,830 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 14:14:41,830 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 71 transitions. [2023-12-02 14:14:41,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 14:14:41,831 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:14:41,831 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-02 14:14:41,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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 14:14:42,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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 14:14:42,034 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:14:42,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:14:42,035 INFO L85 PathProgramCache]: Analyzing trace with hash 2011236365, now seen corresponding path program 1 times [2023-12-02 14:14:42,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:14:42,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1149015522] [2023-12-02 14:14:42,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:14:42,036 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 14:14:42,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:14:42,037 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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 14:14:42,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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 14:14:55,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:14:55,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 14:14:55,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:15:10,445 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 14:15:44,268 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 14:15:46,317 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 14:15:46,318 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 14:15:46,318 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:15:46,318 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:15:46,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1149015522] [2023-12-02 14:15:46,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1149015522] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:15:46,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:15:46,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 14:15:46,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942493944] [2023-12-02 14:15:46,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:15:46,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 14:15:46,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:15:46,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 14:15:46,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=12, Unknown=3, NotChecked=14, Total=42 [2023-12-02 14:15:46,322 INFO L87 Difference]: Start difference. First operand 53 states and 71 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 14:15:48,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 14:15:50,685 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 14:15:52,825 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 14:15:53,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:15:53,144 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2023-12-02 14:15:53,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 14:15:53,146 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 14:15:53,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:15:53,147 INFO L225 Difference]: With dead ends: 53 [2023-12-02 14:15:53,147 INFO L226 Difference]: Without dead ends: 48 [2023-12-02 14:15:53,148 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 14:15:53,149 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 67 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-12-02 14:15:53,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 155 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 2 Unknown, 142 Unchecked, 4.6s Time] [2023-12-02 14:15:53,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-12-02 14:15:53,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2023-12-02 14:15:53,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 35 states have (on average 1.4) internal successors, (49), 36 states have internal predecessors, (49), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 14:15:53,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 66 transitions. [2023-12-02 14:15:53,162 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 66 transitions. Word has length 6 [2023-12-02 14:15:53,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:15:53,162 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 66 transitions. [2023-12-02 14:15:53,162 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 14:15:53,163 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 66 transitions. [2023-12-02 14:15:53,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 14:15:53,164 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:15:53,164 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 14:15:53,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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 14:15:53,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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 14:15:53,365 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:15:53,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:15:53,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1646139112, now seen corresponding path program 1 times [2023-12-02 14:15:53,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:15:53,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [843620008] [2023-12-02 14:15:53,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:15:53,367 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 14:15:53,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:15:53,368 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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 14:15:53,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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 14:15:53,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:15:53,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 14:15:53,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:15:53,771 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 14:15:53,771 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:15:53,771 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:15:53,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [843620008] [2023-12-02 14:15:53,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [843620008] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:15:53,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:15:53,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 14:15:53,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528898347] [2023-12-02 14:15:53,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:15:53,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 14:15:53,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:15:53,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 14:15:53,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 14:15:53,775 INFO L87 Difference]: Start difference. First operand 48 states and 66 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 14:15:54,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:15:54,279 INFO L93 Difference]: Finished difference Result 93 states and 130 transitions. [2023-12-02 14:15:54,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 14:15:54,280 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 14:15:54,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:15:54,283 INFO L225 Difference]: With dead ends: 93 [2023-12-02 14:15:54,283 INFO L226 Difference]: Without dead ends: 66 [2023-12-02 14:15:54,284 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 14:15:54,286 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 16 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 398 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 14:15:54,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 398 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 14:15:54,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-12-02 14:15:54,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2023-12-02 14:15:54,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 43 states have internal predecessors, (55), 10 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2023-12-02 14:15:54,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 77 transitions. [2023-12-02 14:15:54,301 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 77 transitions. Word has length 28 [2023-12-02 14:15:54,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:15:54,301 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 77 transitions. [2023-12-02 14:15:54,302 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 14:15:54,302 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 77 transitions. [2023-12-02 14:15:54,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 14:15:54,304 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:15:54,304 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 14:15:54,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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 14:15:54,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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 14:15:54,507 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:15:54,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:15:54,507 INFO L85 PathProgramCache]: Analyzing trace with hash 478532291, now seen corresponding path program 1 times [2023-12-02 14:15:54,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:15:54,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [478432] [2023-12-02 14:15:54,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:15:54,508 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 14:15:54,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:15:54,510 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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 14:15:54,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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 14:15:54,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:15:54,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 14:15:54,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:15:55,028 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 14:15:55,028 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:15:55,256 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 14:15:55,256 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:15:55,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [478432] [2023-12-02 14:15:55,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [478432] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:15:55,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1973883650] [2023-12-02 14:15:55,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:15:55,257 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 14:15:55,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 14:15:55,281 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 14:15:55,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2023-12-02 14:15:55,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:15:55,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 14:15:55,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:15:55,450 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 14:15:55,450 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:15:55,662 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 14:15:55,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1973883650] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:15:55,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111509086] [2023-12-02 14:15:55,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:15:55,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:15:55,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:15:55,665 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:15:55,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 14:15:55,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:15:55,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 14:15:55,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:15:55,824 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 14:15:55,824 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:15:56,036 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 14:15:56,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111509086] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:15:56,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 14:15:56,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 9 [2023-12-02 14:15:56,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022879327] [2023-12-02 14:15:56,038 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 14:15:56,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 14:15:56,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:15:56,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 14:15:56,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-02 14:15:56,040 INFO L87 Difference]: Start difference. First operand 57 states and 77 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 14:15:56,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:15:56,798 INFO L93 Difference]: Finished difference Result 112 states and 152 transitions. [2023-12-02 14:15:56,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 14:15:56,799 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 14:15:56,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:15:56,801 INFO L225 Difference]: With dead ends: 112 [2023-12-02 14:15:56,801 INFO L226 Difference]: Without dead ends: 85 [2023-12-02 14:15:56,802 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 14:15:56,803 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 21 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 453 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 14:15:56,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 453 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 14:15:56,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-12-02 14:15:56,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 66. [2023-12-02 14:15:56,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 47 states have (on average 1.3191489361702127) internal successors, (62), 49 states have internal predecessors, (62), 12 states have call successors, (12), 5 states have call predecessors, (12), 6 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2023-12-02 14:15:56,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 89 transitions. [2023-12-02 14:15:56,818 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 89 transitions. Word has length 32 [2023-12-02 14:15:56,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:15:56,819 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 89 transitions. [2023-12-02 14:15:56,819 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 14:15:56,819 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 89 transitions. [2023-12-02 14:15:56,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-02 14:15:56,821 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:15:56,821 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 14:15:56,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2023-12-02 14:15:57,025 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 14:15:57,224 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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 14:15:57,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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 14:15:57,422 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:15:57,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:15:57,422 INFO L85 PathProgramCache]: Analyzing trace with hash -490985982, now seen corresponding path program 1 times [2023-12-02 14:15:57,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:15:57,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1260115901] [2023-12-02 14:15:57,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:15:57,423 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:15:57,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:15:57,424 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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 14:15:57,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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 14:15:57,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:15:57,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 14:15:57,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:15:57,872 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 14:15:57,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:15:58,090 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 14:15:58,091 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:15:58,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1260115901] [2023-12-02 14:15:58,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1260115901] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:15:58,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1718848529] [2023-12-02 14:15:58,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:15:58,091 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 14:15:58,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 14:15:58,093 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 14:15:58,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2023-12-02 14:15:58,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:15:58,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 14:15:58,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:15:58,651 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 14:15:58,652 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:15:58,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1718848529] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:15:58,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 14:15:58,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 8] total 12 [2023-12-02 14:15:58,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310819055] [2023-12-02 14:15:58,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:15:58,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 14:15:58,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:15:58,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 14:15:58,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2023-12-02 14:15:58,654 INFO L87 Difference]: Start difference. First operand 66 states and 89 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 14:15:59,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:15:59,522 INFO L93 Difference]: Finished difference Result 105 states and 141 transitions. [2023-12-02 14:15:59,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 14:15:59,523 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 14:15:59,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:15:59,525 INFO L225 Difference]: With dead ends: 105 [2023-12-02 14:15:59,525 INFO L226 Difference]: Without dead ends: 83 [2023-12-02 14:15:59,526 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 14:15:59,528 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 16 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 14:15:59,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 463 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 14:15:59,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-12-02 14:15:59,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 73. [2023-12-02 14:15:59,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 54 states have internal predecessors, (68), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2023-12-02 14:15:59,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 97 transitions. [2023-12-02 14:15:59,538 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 97 transitions. Word has length 35 [2023-12-02 14:15:59,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:15:59,538 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 97 transitions. [2023-12-02 14:15:59,538 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 14:15:59,538 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 97 transitions. [2023-12-02 14:15:59,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-02 14:15:59,540 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:15:59,540 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 14:15:59,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2023-12-02 14:15:59,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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 14:15:59,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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 14:15:59,941 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:15:59,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:15:59,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1559779026, now seen corresponding path program 2 times [2023-12-02 14:15:59,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:15:59,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1935407228] [2023-12-02 14:15:59,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 14:15:59,942 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 14:15:59,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:15:59,943 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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 14:15:59,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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 14:15:59,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-12-02 14:15:59,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:15:59,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 14:15:59,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:16:00,342 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 14:16:00,342 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:16:00,342 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:16:00,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1935407228] [2023-12-02 14:16:00,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1935407228] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:16:00,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:16:00,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 14:16:00,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770745595] [2023-12-02 14:16:00,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:16:00,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 14:16:00,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:16:00,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 14:16:00,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:16:00,344 INFO L87 Difference]: Start difference. First operand 73 states and 97 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 14:16:02,864 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 14:16:02,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:16:02,999 INFO L93 Difference]: Finished difference Result 97 states and 128 transitions. [2023-12-02 14:16:03,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 14:16:03,000 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 14:16:03,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:16:03,002 INFO L225 Difference]: With dead ends: 97 [2023-12-02 14:16:03,002 INFO L226 Difference]: Without dead ends: 95 [2023-12-02 14:16:03,003 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 14:16:03,004 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 17 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-12-02 14:16:03,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 293 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2023-12-02 14:16:03,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-12-02 14:16:03,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 79. [2023-12-02 14:16:03,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 59 states have internal predecessors, (73), 14 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (17), 12 states have call predecessors, (17), 13 states have call successors, (17) [2023-12-02 14:16:03,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 104 transitions. [2023-12-02 14:16:03,015 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 104 transitions. Word has length 36 [2023-12-02 14:16:03,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:16:03,015 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 104 transitions. [2023-12-02 14:16:03,016 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 14:16:03,016 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 104 transitions. [2023-12-02 14:16:03,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-02 14:16:03,017 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:16:03,017 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 14:16:03,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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 14:16:03,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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 14:16:03,218 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:16:03,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:16:03,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1502520724, now seen corresponding path program 1 times [2023-12-02 14:16:03,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:16:03,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1088470137] [2023-12-02 14:16:03,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:16:03,219 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 14:16:03,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:16:03,220 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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 14:16:03,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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 14:16:03,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:16:03,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 14:16:03,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:16:03,615 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 14:16:03,615 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:16:03,615 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:16:03,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1088470137] [2023-12-02 14:16:03,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1088470137] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:16:03,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:16:03,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 14:16:03,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687929902] [2023-12-02 14:16:03,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:16:03,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 14:16:03,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:16:03,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 14:16:03,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:16:03,617 INFO L87 Difference]: Start difference. First operand 79 states and 104 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 14:16:06,631 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 14:16:06,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:16:06,966 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2023-12-02 14:16:06,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 14:16:06,967 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 14:16:06,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:16:06,968 INFO L225 Difference]: With dead ends: 89 [2023-12-02 14:16:06,969 INFO L226 Difference]: Without dead ends: 87 [2023-12-02 14:16:06,969 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 14:16:06,970 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 27 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-12-02 14:16:06,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 265 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 58 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2023-12-02 14:16:06,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-12-02 14:16:06,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 77. [2023-12-02 14:16:06,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 55 states have (on average 1.290909090909091) internal successors, (71), 57 states have internal predecessors, (71), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2023-12-02 14:16:06,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 100 transitions. [2023-12-02 14:16:06,984 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 100 transitions. Word has length 36 [2023-12-02 14:16:06,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:16:06,984 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 100 transitions. [2023-12-02 14:16:06,985 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 14:16:06,985 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 100 transitions. [2023-12-02 14:16:06,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-02 14:16:06,986 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:16:06,987 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 14:16:06,989 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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 14:16:07,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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 14:16:07,187 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:16:07,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:16:07,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1097054391, now seen corresponding path program 1 times [2023-12-02 14:16:07,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:16:07,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1010206728] [2023-12-02 14:16:07,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:16:07,188 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 14:16:07,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:16:07,189 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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 14:16:07,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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 14:16:07,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:16:07,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 14:16:07,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:16:07,639 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 14:16:07,639 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:16:08,057 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 14:16:08,057 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:16:08,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1010206728] [2023-12-02 14:16:08,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1010206728] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:16:08,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [647362241] [2023-12-02 14:16:08,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:16:08,064 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 14:16:08,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 14:16:08,065 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 14:16:08,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2023-12-02 14:16:08,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:16:08,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 14:16:08,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:16:08,254 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 14:16:08,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:16:08,574 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 14:16:08,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [647362241] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:16:08,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731579246] [2023-12-02 14:16:08,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:16:08,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:16:08,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:16:08,575 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:16:08,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 14:16:08,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:16:08,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 14:16:08,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:16:08,760 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 14:16:08,761 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:16:09,087 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 14:16:09,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731579246] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:16:09,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 14:16:09,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 9 [2023-12-02 14:16:09,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694777291] [2023-12-02 14:16:09,088 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 14:16:09,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 14:16:09,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:16:09,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 14:16:09,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-12-02 14:16:09,090 INFO L87 Difference]: Start difference. First operand 77 states and 100 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 14:16:09,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:16:09,873 INFO L93 Difference]: Finished difference Result 119 states and 160 transitions. [2023-12-02 14:16:09,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 14:16:09,875 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 14:16:09,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:16:09,876 INFO L225 Difference]: With dead ends: 119 [2023-12-02 14:16:09,876 INFO L226 Difference]: Without dead ends: 108 [2023-12-02 14:16:09,877 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 14:16:09,877 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 41 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 14:16:09,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 445 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 14:16:09,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-12-02 14:16:09,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 89. [2023-12-02 14:16:09,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 66 states have internal predecessors, (79), 16 states have call successors, (16), 7 states have call predecessors, (16), 10 states have return successors, (22), 15 states have call predecessors, (22), 15 states have call successors, (22) [2023-12-02 14:16:09,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 117 transitions. [2023-12-02 14:16:09,898 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 117 transitions. Word has length 39 [2023-12-02 14:16:09,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:16:09,898 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 117 transitions. [2023-12-02 14:16:09,898 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 14:16:09,898 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 117 transitions. [2023-12-02 14:16:09,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-02 14:16:09,900 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:16:09,900 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 14:16:09,904 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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 14:16:10,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 14:16:10,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2023-12-02 14:16:10,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 14:16:10,501 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:16:10,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:16:10,501 INFO L85 PathProgramCache]: Analyzing trace with hash 704027381, now seen corresponding path program 1 times [2023-12-02 14:16:10,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:16:10,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [173271020] [2023-12-02 14:16:10,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:16:10,502 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:16:10,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:16:10,503 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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 14:16:10,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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 14:16:10,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:16:10,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 14:16:10,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:16:11,224 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 14:16:11,224 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:16:11,224 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:16:11,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [173271020] [2023-12-02 14:16:11,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [173271020] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:16:11,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:16:11,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-12-02 14:16:11,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022071927] [2023-12-02 14:16:11,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:16:11,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 14:16:11,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:16:11,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 14:16:11,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-12-02 14:16:11,226 INFO L87 Difference]: Start difference. First operand 89 states and 117 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 14:16:12,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:16:12,547 INFO L93 Difference]: Finished difference Result 122 states and 161 transitions. [2023-12-02 14:16:12,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 14:16:12,548 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 14:16:12,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:16:12,550 INFO L225 Difference]: With dead ends: 122 [2023-12-02 14:16:12,550 INFO L226 Difference]: Without dead ends: 115 [2023-12-02 14:16:12,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-12-02 14:16:12,551 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 30 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 14:16:12,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 597 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-02 14:16:12,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-12-02 14:16:12,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 91. [2023-12-02 14:16:12,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 64 states have (on average 1.265625) internal successors, (81), 67 states have internal predecessors, (81), 16 states have call successors, (16), 7 states have call predecessors, (16), 10 states have return successors, (22), 16 states have call predecessors, (22), 15 states have call successors, (22) [2023-12-02 14:16:12,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 119 transitions. [2023-12-02 14:16:12,563 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 119 transitions. Word has length 39 [2023-12-02 14:16:12,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:16:12,563 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 119 transitions. [2023-12-02 14:16:12,563 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 14:16:12,564 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 119 transitions. [2023-12-02 14:16:12,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-02 14:16:12,565 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:16:12,565 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 14:16:12,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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)] Ended with exit code 0 [2023-12-02 14:16:12,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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 14:16:12,766 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:16:12,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:16:12,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1960839867, now seen corresponding path program 1 times [2023-12-02 14:16:12,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:16:12,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [189428569] [2023-12-02 14:16:12,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:16:12,767 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 14:16:12,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:16:12,768 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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 14:16:12,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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 14:16:12,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:16:12,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 14:16:12,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:16:13,544 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 14:16:13,545 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:16:14,411 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 14:16:14,411 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:16:14,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [189428569] [2023-12-02 14:16:14,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [189428569] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:16:14,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [718312531] [2023-12-02 14:16:14,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:16:14,412 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 14:16:14,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 14:16:14,413 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 14:16:14,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2023-12-02 14:16:14,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:16:14,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 14:16:14,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:16:15,228 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 14:16:15,228 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:16:16,294 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 14:16:16,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [718312531] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:16:16,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378777962] [2023-12-02 14:16:16,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:16:16,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:16:16,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:16:16,296 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:16:16,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-02 14:16:16,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:16:16,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 14:16:16,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:16:16,522 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 14:16:16,523 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:16:16,988 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 14:16:16,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378777962] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:16:16,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 14:16:16,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10, 10, 11, 11] total 21 [2023-12-02 14:16:16,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716046259] [2023-12-02 14:16:16,989 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 14:16:16,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-02 14:16:16,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:16:16,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-02 14:16:16,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2023-12-02 14:16:16,992 INFO L87 Difference]: Start difference. First operand 91 states and 119 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 14:16:20,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:16:20,169 INFO L93 Difference]: Finished difference Result 163 states and 218 transitions. [2023-12-02 14:16:20,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 14:16:20,170 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 14:16:20,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:16:20,172 INFO L225 Difference]: With dead ends: 163 [2023-12-02 14:16:20,172 INFO L226 Difference]: Without dead ends: 136 [2023-12-02 14:16:20,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2023-12-02 14:16:20,174 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 87 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 893 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-12-02 14:16:20,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 893 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-12-02 14:16:20,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-12-02 14:16:20,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 113. [2023-12-02 14:16:20,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 80 states have (on average 1.2375) internal successors, (99), 82 states have internal predecessors, (99), 20 states have call successors, (20), 9 states have call predecessors, (20), 12 states have return successors, (31), 21 states have call predecessors, (31), 19 states have call successors, (31) [2023-12-02 14:16:20,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 150 transitions. [2023-12-02 14:16:20,191 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 150 transitions. Word has length 41 [2023-12-02 14:16:20,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:16:20,191 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 150 transitions. [2023-12-02 14:16:20,191 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 14:16:20,191 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 150 transitions. [2023-12-02 14:16:20,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-02 14:16:20,193 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:16:20,193 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 14:16:20,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2023-12-02 14:16:20,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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)] Ended with exit code 0 [2023-12-02 14:16:20,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-02 14:16:20,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:16:20,795 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:16:20,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:16:20,796 INFO L85 PathProgramCache]: Analyzing trace with hash 2018098169, now seen corresponding path program 1 times [2023-12-02 14:16:20,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:16:20,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [884210484] [2023-12-02 14:16:20,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:16:20,796 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 14:16:20,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:16:20,797 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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 14:16:20,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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 14:16:20,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:16:20,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 14:16:20,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:16:21,018 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 14:16:21,018 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:16:21,019 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:16:21,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [884210484] [2023-12-02 14:16:21,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [884210484] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:16:21,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:16:21,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 14:16:21,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255688096] [2023-12-02 14:16:21,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:16:21,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 14:16:21,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:16:21,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 14:16:21,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:16:21,021 INFO L87 Difference]: Start difference. First operand 113 states and 150 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 14:16:21,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:16:21,316 INFO L93 Difference]: Finished difference Result 121 states and 157 transitions. [2023-12-02 14:16:21,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 14:16:21,317 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 14:16:21,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:16:21,318 INFO L225 Difference]: With dead ends: 121 [2023-12-02 14:16:21,318 INFO L226 Difference]: Without dead ends: 101 [2023-12-02 14:16:21,318 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 14:16:21,319 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 6 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 14:16:21,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 291 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 14:16:21,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-12-02 14:16:21,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2023-12-02 14:16:21,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 71 states have (on average 1.2253521126760563) internal successors, (87), 74 states have internal predecessors, (87), 18 states have call successors, (18), 8 states have call predecessors, (18), 11 states have return successors, (27), 18 states have call predecessors, (27), 17 states have call successors, (27) [2023-12-02 14:16:21,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 132 transitions. [2023-12-02 14:16:21,339 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 132 transitions. Word has length 41 [2023-12-02 14:16:21,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:16:21,339 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 132 transitions. [2023-12-02 14:16:21,339 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 14:16:21,339 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 132 transitions. [2023-12-02 14:16:21,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-02 14:16:21,340 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:16:21,340 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] [2023-12-02 14:16:21,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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 14:16:21,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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 14:16:21,541 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:16:21,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:16:21,541 INFO L85 PathProgramCache]: Analyzing trace with hash -890656185, now seen corresponding path program 1 times [2023-12-02 14:16:21,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:16:21,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [654047522] [2023-12-02 14:16:21,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:16:21,542 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 14:16:21,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:16:21,543 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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 14:16:21,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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 14:16:21,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 14:16:21,583 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 14:16:21,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 14:16:21,632 INFO L130 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2023-12-02 14:16:21,632 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 14:16:21,634 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-12-02 14:16:21,635 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-12-02 14:16:21,638 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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)] Ended with exit code 0 [2023-12-02 14:16:21,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/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 14:16:21,838 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:16:21,841 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-12-02 14:16:21,853 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret11 could not be translated [2023-12-02 14:16:21,854 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret12 could not be translated [2023-12-02 14:16:21,855 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret13 could not be translated [2023-12-02 14:16:21,865 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 02:16:21 BoogieIcfgContainer [2023-12-02 14:16:21,865 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-02 14:16:21,865 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 14:16:21,865 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 14:16:21,865 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 14:16:21,866 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:14:41" (3/4) ... [2023-12-02 14:16:21,866 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-12-02 14:16:21,870 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret11 could not be translated [2023-12-02 14:16:21,871 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret12 could not be translated [2023-12-02 14:16:21,872 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret13 could not be translated [2023-12-02 14:16:21,917 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/witness.graphml [2023-12-02 14:16:21,917 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 14:16:21,918 INFO L158 Benchmark]: Toolchain (without parser) took 103848.08ms. Allocated memory is still 90.2MB. Free memory was 66.5MB in the beginning and 51.4MB in the end (delta: 15.1MB). Peak memory consumption was 17.4MB. Max. memory is 16.1GB. [2023-12-02 14:16:21,918 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 62.9MB. Free memory was 39.6MB in the beginning and 39.5MB in the end (delta: 81.6kB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 14:16:21,919 INFO L158 Benchmark]: CACSL2BoogieTranslator took 330.26ms. Allocated memory is still 90.2MB. Free memory was 66.2MB in the beginning and 51.8MB in the end (delta: 14.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-12-02 14:16:21,919 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.70ms. Allocated memory is still 90.2MB. Free memory was 51.6MB in the beginning and 49.8MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 14:16:21,919 INFO L158 Benchmark]: Boogie Preprocessor took 37.73ms. Allocated memory is still 90.2MB. Free memory was 49.8MB in the beginning and 48.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 14:16:21,920 INFO L158 Benchmark]: RCFGBuilder took 2605.46ms. Allocated memory is still 90.2MB. Free memory was 48.0MB in the beginning and 55.5MB in the end (delta: -7.5MB). Peak memory consumption was 8.6MB. Max. memory is 16.1GB. [2023-12-02 14:16:21,920 INFO L158 Benchmark]: TraceAbstraction took 100772.28ms. Allocated memory is still 90.2MB. Free memory was 55.0MB in the beginning and 54.8MB in the end (delta: 209.9kB). Peak memory consumption was 451.5kB. Max. memory is 16.1GB. [2023-12-02 14:16:21,921 INFO L158 Benchmark]: Witness Printer took 52.24ms. Allocated memory is still 90.2MB. Free memory was 54.8MB in the beginning and 51.4MB in the end (delta: 3.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-12-02 14:16:21,922 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 62.9MB. Free memory was 39.6MB in the beginning and 39.5MB in the end (delta: 81.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 330.26ms. Allocated memory is still 90.2MB. Free memory was 66.2MB in the beginning and 51.8MB in the end (delta: 14.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 43.70ms. Allocated memory is still 90.2MB. Free memory was 51.6MB in the beginning and 49.8MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.73ms. Allocated memory is still 90.2MB. Free memory was 49.8MB in the beginning and 48.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 2605.46ms. Allocated memory is still 90.2MB. Free memory was 48.0MB in the beginning and 55.5MB in the end (delta: -7.5MB). Peak memory consumption was 8.6MB. Max. memory is 16.1GB. * TraceAbstraction took 100772.28ms. Allocated memory is still 90.2MB. Free memory was 55.0MB in the beginning and 54.8MB in the end (delta: 209.9kB). Peak memory consumption was 451.5kB. Max. memory is 16.1GB. * Witness Printer took 52.24ms. Allocated memory is still 90.2MB. Free memory was 54.8MB in the beginning and 51.4MB in the end (delta: 3.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret11 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret12 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret13 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret11 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret12 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret13 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * 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 - CounterExampleResult [Line: 60]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L309] COND FALSE !(__VERIFIER_nondet_int()) [L312] CALL main2() [L269] unsigned int a ; [L270] unsigned int ma = __VERIFIER_nondet_uint(); [L271] signed char ea = __VERIFIER_nondet_char(); [L272] unsigned int b ; [L273] unsigned int mb = __VERIFIER_nondet_uint(); [L274] signed char eb = __VERIFIER_nondet_char(); [L275] unsigned int r_add1 ; [L276] unsigned int r_add2 ; [L277] unsigned int zero ; [L278] int tmp ; [L279] int tmp___0 ; [L280] int __retres14 ; [L284] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L68] unsigned int res ; [L69] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L72] COND TRUE ! m [L73] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0, m=0] [L123] return (__retres4); [L284] RET, EXPR base2flt(0, 0) [L284] zero = base2flt(0, 0) [L285] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=0, \old(m)=16777216] [L68] unsigned int res ; [L69] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L72] COND FALSE !(! m) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L78] COND FALSE !(m < 1U << 24U) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L100] COND TRUE 1 VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L102] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L119] m = m & ~ (1U << 24U) [L120] res = m | ((unsigned int )(e + 128) << 24U) [L121] __retres4 = res VAL [\old(e)=0, \old(m)=16777216, __retres4=2147483648, e=0, m=0, res=2147483648] [L123] return (__retres4); [L285] RET, EXPR base2flt(ma, ea) VAL [ea=0, ma=16777216, zero=0] [L285] a = base2flt(ma, ea) [L286] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=64, \old(m)=16777216] [L68] unsigned int res ; [L69] unsigned int __retres4 ; VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L72] COND FALSE !(! m) VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L78] COND FALSE !(m < 1U << 24U) VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L100] COND TRUE 1 VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L102] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L119] m = m & ~ (1U << 24U) [L120] res = m | ((unsigned int )(e + 128) << 24U) [L121] __retres4 = res VAL [\old(e)=64, \old(m)=16777216, __retres4=3221225472, e=64, m=0, res=3221225472] [L123] return (__retres4); [L286] RET, EXPR base2flt(mb, eb) VAL [a=2147483648, ea=0, eb=64, ma=16777216, mb=16777216, zero=0] [L286] b = base2flt(mb, eb) [L287] CALL addflt(a, b) VAL [\old(a)=2147483648, \old(b)=3221225472] [L127] unsigned int res ; [L128] unsigned int ma ; [L129] unsigned int mb ; [L130] unsigned int delta ; [L131] int ea ; [L132] int eb ; [L133] unsigned int tmp ; [L134] unsigned int __retres10 ; VAL [\old(a)=2147483648, \old(b)=3221225472, a=2147483648, b=3221225472] [L137] COND TRUE a < b [L138] tmp = a [L139] a = b [L140] b = tmp VAL [\old(a)=2147483648, \old(b)=3221225472, a=3221225472, b=2147483648, tmp=2147483648] [L144] COND FALSE !(! b) [L151] ma = a & ((1U << 24U) - 1U) [L152] ea = (int )(a >> 24U) - 128 [L153] ma = ma | (1U << 24U) [L154] mb = b & ((1U << 24U) - 1U) [L155] eb = (int )(b >> 24U) - 128 [L156] mb = mb | (1U << 24U) VAL [\old(a)=2147483648, \old(b)=3221225472, a=3221225472, b=2147483648, ea=64, eb=0, ma=16777216, mb=16777216, tmp=2147483648] [L157] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=1] [L59] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L157] RET __VERIFIER_assert(ea >= eb) VAL [\old(a)=2147483648, \old(b)=3221225472, a=3221225472, b=2147483648, ea=64, eb=0, ma=16777216, mb=16777216, tmp=2147483648] [L158] delta = ea - eb VAL [\old(a)=2147483648, \old(b)=3221225472, a=3221225472, b=2147483648, delta=64, ea=64, eb=0, ma=16777216, mb=16777216, tmp=2147483648] [L159] CALL __VERIFIER_assert(delta < sizeof(mb) * 8) VAL [\old(cond)=0] [L59] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L60] reach_error() VAL [\old(cond)=0, cond=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: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 57 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 100.7s, OverallIterations: 12, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 20.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 4 mSolverCounterUnknown, 355 SdHoareTripleChecker+Valid, 15.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 328 mSDsluCounter, 4323 SdHoareTripleChecker+Invalid, 15.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 142 IncrementalHoareTripleChecker+Unchecked, 3639 mSDsCounter, 50 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1103 IncrementalHoareTripleChecker+Invalid, 1299 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 50 mSolverCounterUnsat, 684 mSDtfsCounter, 1103 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 980 GetRequests, 870 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 16.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=113occurred in iteration=10, InterpolantAutomatonStates: 97, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 130 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 14.0s SatisfiabilityAnalysisTime, 61.2s InterpolantComputationTime, 640 NumberOfCodeBlocks, 624 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 941 ConstructedInterpolants, 4 QuantifiedInterpolants, 1876 SizeOfPredicates, 65 NumberOfNonLiveVariables, 1228 ConjunctsInSsa, 142 ConjunctsInUnsatCore, 28 InterpolantComputations, 8 PerfectInterpolantSequences, 339/399 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 proved your program to be incorrect! [2023-12-02 14:16:22,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0fd86f-452d-4182-a0e5-6da56e53c03b/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE