./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa686b8a-ffda-436b-b057-67c641cb0b74/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa686b8a-ffda-436b-b057-67c641cb0b74/bin/utaipan-verify-FOvIYxoinp/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa686b8a-ffda-436b-b057-67c641cb0b74/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa686b8a-ffda-436b-b057-67c641cb0b74/bin/utaipan-verify-FOvIYxoinp/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa686b8a-ffda-436b-b057-67c641cb0b74/bin/utaipan-verify-FOvIYxoinp/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa686b8a-ffda-436b-b057-67c641cb0b74/bin/utaipan-verify-FOvIYxoinp --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:06:17,501 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:06:17,583 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa686b8a-ffda-436b-b057-67c641cb0b74/bin/utaipan-verify-FOvIYxoinp/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-06 21:06:17,589 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:06:17,590 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:06:17,619 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:06:17,620 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:06:17,621 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:06:17,622 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:06:17,622 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:06:17,623 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 21:06:17,624 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 21:06:17,624 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 21:06:17,625 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-06 21:06:17,626 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 21:06:17,626 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 21:06:17,627 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-06 21:06:17,628 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-06 21:06:17,628 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 21:06:17,629 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-06 21:06:17,629 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-06 21:06:17,630 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-06 21:06:17,631 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:06:17,632 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 21:06:17,632 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:06:17,633 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:06:17,633 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:06:17,634 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:06:17,634 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 21:06:17,635 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:06:17,635 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 21:06:17,636 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:06:17,636 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 21:06:17,637 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:06:17,637 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:06:17,638 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:06:17,638 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:06:17,639 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:06:17,640 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:06:17,640 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 21:06:17,641 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-06 21:06:17,641 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:06:17,642 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 21:06:17,642 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 21:06:17,643 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:06:17,643 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_aa686b8a-ffda-436b-b057-67c641cb0b74/bin/utaipan-verify-FOvIYxoinp/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa686b8a-ffda-436b-b057-67c641cb0b74/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 [2023-11-06 21:06:17,985 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:06:18,018 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:06:18,021 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:06:18,022 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:06:18,023 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:06:18,025 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa686b8a-ffda-436b-b057-67c641cb0b74/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2023-11-06 21:06:21,148 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:06:21,350 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:06:21,351 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa686b8a-ffda-436b-b057-67c641cb0b74/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2023-11-06 21:06:21,361 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa686b8a-ffda-436b-b057-67c641cb0b74/bin/utaipan-verify-FOvIYxoinp/data/1d402275a/d8f69321c9384bd180ba7982f4f5e423/FLAGf3755f6bc [2023-11-06 21:06:21,377 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa686b8a-ffda-436b-b057-67c641cb0b74/bin/utaipan-verify-FOvIYxoinp/data/1d402275a/d8f69321c9384bd180ba7982f4f5e423 [2023-11-06 21:06:21,380 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:06:21,381 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:06:21,383 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:06:21,383 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:06:21,390 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:06:21,390 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:06:21" (1/1) ... [2023-11-06 21:06:21,392 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b59085f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:06:21, skipping insertion in model container [2023-11-06 21:06:21,392 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:06:21" (1/1) ... [2023-11-06 21:06:21,426 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:06:21,591 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_aa686b8a-ffda-436b-b057-67c641cb0b74/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c[728,741] [2023-11-06 21:06:21,647 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:06:21,657 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:06:21,670 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_aa686b8a-ffda-436b-b057-67c641cb0b74/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c[728,741] [2023-11-06 21:06:21,702 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:06:21,717 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:06:21,717 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:06:21 WrapperNode [2023-11-06 21:06:21,718 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:06:21,719 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:06:21,719 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:06:21,719 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:06:21,727 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:06:21" (1/1) ... [2023-11-06 21:06:21,737 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:06:21" (1/1) ... [2023-11-06 21:06:21,765 INFO L138 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 146 [2023-11-06 21:06:21,765 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:06:21,766 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:06:21,767 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:06:21,767 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:06:21,778 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:06:21" (1/1) ... [2023-11-06 21:06:21,778 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:06:21" (1/1) ... [2023-11-06 21:06:21,781 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:06:21" (1/1) ... [2023-11-06 21:06:21,782 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:06:21" (1/1) ... [2023-11-06 21:06:21,788 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:06:21" (1/1) ... [2023-11-06 21:06:21,793 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:06:21" (1/1) ... [2023-11-06 21:06:21,795 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:06:21" (1/1) ... [2023-11-06 21:06:21,797 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:06:21" (1/1) ... [2023-11-06 21:06:21,801 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:06:21,802 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:06:21,802 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:06:21,803 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:06:21,804 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:06:21" (1/1) ... [2023-11-06 21:06:21,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:06:21,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa686b8a-ffda-436b-b057-67c641cb0b74/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:06:21,845 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa686b8a-ffda-436b-b057-67c641cb0b74/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:06:21,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa686b8a-ffda-436b-b057-67c641cb0b74/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:06:21,910 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:06:21,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:06:21,911 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-11-06 21:06:21,911 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-11-06 21:06:21,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:06:21,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:06:21,919 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-06 21:06:21,919 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-06 21:06:22,030 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:06:22,034 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:06:22,485 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:06:22,693 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:06:22,694 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 21:06:22,696 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:06:22 BoogieIcfgContainer [2023-11-06 21:06:22,697 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:06:22,701 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:06:22,701 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:06:22,706 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:06:22,706 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:06:21" (1/3) ... [2023-11-06 21:06:22,708 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ba92357 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:06:22, skipping insertion in model container [2023-11-06 21:06:22,708 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:06:21" (2/3) ... [2023-11-06 21:06:22,710 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ba92357 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:06:22, skipping insertion in model container [2023-11-06 21:06:22,710 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:06:22" (3/3) ... [2023-11-06 21:06:22,711 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_3a.c.cil.c [2023-11-06 21:06:22,731 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:06:22,732 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 21:06:22,791 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:06:22,798 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=LoopsAndPotentialCycles, 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;@c1fc0dc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 21:06:22,798 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 21:06:22,802 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 32 states have internal predecessors, (47), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-06 21:06:22,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-06 21:06:22,812 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:06:22,813 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:06:22,813 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:06:22,819 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:06:22,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1922523142, now seen corresponding path program 1 times [2023-11-06 21:06:22,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:06:22,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712235139] [2023-11-06 21:06:22,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:06:22,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:06:23,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:06:23,444 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 21:06:23,445 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:06:23,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712235139] [2023-11-06 21:06:23,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712235139] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:06:23,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524934447] [2023-11-06 21:06:23,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:06:23,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:06:23,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa686b8a-ffda-436b-b057-67c641cb0b74/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:06:23,458 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa686b8a-ffda-436b-b057-67c641cb0b74/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:06:23,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa686b8a-ffda-436b-b057-67c641cb0b74/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:06:23,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:06:23,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 21:06:23,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:06:23,862 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-06 21:06:23,862 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:06:24,330 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-06 21:06:24,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524934447] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:06:24,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [224110481] [2023-11-06 21:06:24,374 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-11-06 21:06:24,376 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 21:06:24,380 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 21:06:24,385 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 21:06:24,386 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 21:06:24,700 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 43 for LOIs [2023-11-06 21:06:24,842 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 21:06:25,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [224110481] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:06:25,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:06:25,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4, 13, 11] total 30 [2023-11-06 21:06:25,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051357595] [2023-11-06 21:06:25,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:06:25,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 21:06:25,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:06:25,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 21:06:25,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2023-11-06 21:06:25,813 INFO L87 Difference]: Start difference. First operand has 39 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 32 states have internal predecessors, (47), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 9 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-06 21:06:26,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:06:26,169 INFO L93 Difference]: Finished difference Result 107 states and 170 transitions. [2023-11-06 21:06:26,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 21:06:26,171 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2023-11-06 21:06:26,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:06:26,183 INFO L225 Difference]: With dead ends: 107 [2023-11-06 21:06:26,183 INFO L226 Difference]: Without dead ends: 65 [2023-11-06 21:06:26,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2023-11-06 21:06:26,196 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 52 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:06:26,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 187 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:06:26,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-06 21:06:26,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 48. [2023-11-06 21:06:26,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 40 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-06 21:06:26,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2023-11-06 21:06:26,277 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 32 [2023-11-06 21:06:26,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:06:26,278 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2023-11-06 21:06:26,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-06 21:06:26,279 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2023-11-06 21:06:26,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-06 21:06:26,283 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:06:26,284 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:06:26,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa686b8a-ffda-436b-b057-67c641cb0b74/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:06:26,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa686b8a-ffda-436b-b057-67c641cb0b74/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:06:26,490 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:06:26,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:06:26,491 INFO L85 PathProgramCache]: Analyzing trace with hash -663923659, now seen corresponding path program 1 times [2023-11-06 21:06:26,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:06:26,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775735664] [2023-11-06 21:06:26,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:06:26,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:06:26,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:06:27,069 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-06 21:06:27,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:06:27,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775735664] [2023-11-06 21:06:27,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775735664] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:06:27,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973735710] [2023-11-06 21:06:27,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:06:27,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:06:27,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa686b8a-ffda-436b-b057-67c641cb0b74/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:06:27,074 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa686b8a-ffda-436b-b057-67c641cb0b74/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:06:27,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa686b8a-ffda-436b-b057-67c641cb0b74/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:06:27,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:06:27,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 21:06:27,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:06:27,304 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-06 21:06:27,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:06:27,647 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-06 21:06:27,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973735710] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:06:27,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1314889880] [2023-11-06 21:06:27,651 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-11-06 21:06:27,651 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 21:06:27,652 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 21:06:27,652 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 21:06:27,652 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 21:06:28,241 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 76 for LOIs [2023-11-06 21:06:28,414 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 11 for LOIs [2023-11-06 21:06:28,526 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 21:06:30,744 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '705#(and (= (select |#length| 3) 12) (<= 1 |#StackHeapBarrier|) (= 22 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (exists ((|v_ULTIMATE.start_mulflt_~b#1_30| Int) (|v_ULTIMATE.start_mulflt_~a#1_22| Int) (|v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~one~0#1_BEFORE_CALL_1| Int)) (and (= (mod |v_ULTIMATE.start_mulflt_~b#1_30| 4294967296) 0) (= |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_1| |v_ULTIMATE.start_mulflt_~b#1_30|) (= |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_5| |v_ULTIMATE.start_mulflt_~a#1_22|) (<= 1 (mod |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_5| 4294967296)) (= (mod |v_ULTIMATE.start_main_~one~0#1_BEFORE_CALL_1| 4294967296) (mod |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_1| 4294967296)))) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0))' at error location [2023-11-06 21:06:30,744 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 21:06:30,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:06:30,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 21 [2023-11-06 21:06:30,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673010303] [2023-11-06 21:06:30,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:06:30,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 21:06:30,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:06:30,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 21:06:30,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1220, Unknown=0, NotChecked=0, Total=1332 [2023-11-06 21:06:30,748 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand has 21 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 4 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-06 21:06:31,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:06:31,474 INFO L93 Difference]: Finished difference Result 130 states and 179 transitions. [2023-11-06 21:06:31,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 21:06:31,477 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 4 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 37 [2023-11-06 21:06:31,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:06:31,480 INFO L225 Difference]: With dead ends: 130 [2023-11-06 21:06:31,482 INFO L226 Difference]: Without dead ends: 79 [2023-11-06 21:06:31,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=170, Invalid=1810, Unknown=0, NotChecked=0, Total=1980 [2023-11-06 21:06:31,485 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 51 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 21:06:31,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 587 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 21:06:31,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-11-06 21:06:31,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2023-11-06 21:06:31,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 47 states have (on average 1.3404255319148937) internal successors, (63), 47 states have internal predecessors, (63), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2023-11-06 21:06:31,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 77 transitions. [2023-11-06 21:06:31,509 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 77 transitions. Word has length 37 [2023-11-06 21:06:31,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:06:31,509 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 77 transitions. [2023-11-06 21:06:31,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 4 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-06 21:06:31,510 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 77 transitions. [2023-11-06 21:06:31,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-06 21:06:31,512 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:06:31,512 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:06:31,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa686b8a-ffda-436b-b057-67c641cb0b74/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:06:31,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa686b8a-ffda-436b-b057-67c641cb0b74/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:06:31,719 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:06:31,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:06:31,719 INFO L85 PathProgramCache]: Analyzing trace with hash -947793246, now seen corresponding path program 1 times [2023-11-06 21:06:31,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:06:31,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992303412] [2023-11-06 21:06:31,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:06:31,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:06:31,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:06:32,045 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-06 21:06:32,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:06:32,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992303412] [2023-11-06 21:06:32,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992303412] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:06:32,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:06:32,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-06 21:06:32,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232551903] [2023-11-06 21:06:32,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:06:32,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 21:06:32,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:06:32,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 21:06:32,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:06:32,050 INFO L87 Difference]: Start difference. First operand 58 states and 77 transitions. Second operand has 8 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-06 21:06:32,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:06:32,210 INFO L93 Difference]: Finished difference Result 82 states and 107 transitions. [2023-11-06 21:06:32,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 21:06:32,211 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2023-11-06 21:06:32,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:06:32,213 INFO L225 Difference]: With dead ends: 82 [2023-11-06 21:06:32,213 INFO L226 Difference]: Without dead ends: 67 [2023-11-06 21:06:32,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-11-06 21:06:32,215 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 16 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:06:32,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 342 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:06:32,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-06 21:06:32,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 58. [2023-11-06 21:06:32,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 47 states have (on average 1.3404255319148937) internal successors, (63), 47 states have internal predecessors, (63), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-06 21:06:32,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2023-11-06 21:06:32,241 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 76 transitions. Word has length 38 [2023-11-06 21:06:32,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:06:32,241 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 76 transitions. [2023-11-06 21:06:32,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-06 21:06:32,242 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 76 transitions. [2023-11-06 21:06:32,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-06 21:06:32,243 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:06:32,244 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:06:32,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 21:06:32,244 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:06:32,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:06:32,245 INFO L85 PathProgramCache]: Analyzing trace with hash 225071812, now seen corresponding path program 1 times [2023-11-06 21:06:32,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:06:32,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954478584] [2023-11-06 21:06:32,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:06:32,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:06:32,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:06:32,511 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 21:06:32,512 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:06:32,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954478584] [2023-11-06 21:06:32,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954478584] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:06:32,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111604341] [2023-11-06 21:06:32,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:06:32,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:06:32,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa686b8a-ffda-436b-b057-67c641cb0b74/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:06:32,514 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa686b8a-ffda-436b-b057-67c641cb0b74/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:06:32,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa686b8a-ffda-436b-b057-67c641cb0b74/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 21:06:32,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:06:32,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 21:06:32,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:06:33,275 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-06 21:06:33,276 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:06:34,237 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-06 21:06:34,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111604341] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:06:34,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [513640185] [2023-11-06 21:06:34,241 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-11-06 21:06:34,241 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 21:06:34,241 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 21:06:34,242 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 21:06:34,242 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 21:06:34,649 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 76 for LOIs [2023-11-06 21:06:34,736 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 11 for LOIs [2023-11-06 21:06:34,849 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 21:06:37,326 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1465#(and (= (select |#length| 3) 12) (<= 1 |#StackHeapBarrier|) (= 22 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= (select |#valid| 1) 1) (exists ((|v_ULTIMATE.start_mulflt_~a#1_25| Int) (|v_ULTIMATE.start_main_~one~0#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_mulflt_~b#1_33| Int)) (and (= |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_2| |v_ULTIMATE.start_mulflt_~b#1_33|) (= (mod |v_ULTIMATE.start_mulflt_~b#1_33| 4294967296) 0) (= (mod |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_2| 4294967296) (mod |v_ULTIMATE.start_main_~one~0#1_BEFORE_CALL_6| 4294967296)) (<= 1 (mod |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_6| 4294967296)) (= |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_6| |v_ULTIMATE.start_mulflt_~a#1_25|))) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0))' at error location [2023-11-06 21:06:37,326 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 21:06:37,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:06:37,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 15, 13] total 29 [2023-11-06 21:06:37,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619720917] [2023-11-06 21:06:37,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:06:37,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-06 21:06:37,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:06:37,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-06 21:06:37,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1896, Unknown=0, NotChecked=0, Total=2070 [2023-11-06 21:06:37,330 INFO L87 Difference]: Start difference. First operand 58 states and 76 transitions. Second operand has 29 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 4 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (11), 8 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-06 21:06:41,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:06:41,769 INFO L93 Difference]: Finished difference Result 213 states and 353 transitions. [2023-11-06 21:06:41,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-06 21:06:41,770 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 4 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (11), 8 states have call predecessors, (11), 4 states have call successors, (11) Word has length 41 [2023-11-06 21:06:41,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:06:41,775 INFO L225 Difference]: With dead ends: 213 [2023-11-06 21:06:41,775 INFO L226 Difference]: Without dead ends: 159 [2023-11-06 21:06:41,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1968 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=730, Invalid=6580, Unknown=0, NotChecked=0, Total=7310 [2023-11-06 21:06:41,782 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 194 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-06 21:06:41,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 625 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1006 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-06 21:06:41,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-11-06 21:06:41,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 72. [2023-11-06 21:06:41,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 58 states have (on average 1.3275862068965518) internal successors, (77), 59 states have internal predecessors, (77), 8 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2023-11-06 21:06:41,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 96 transitions. [2023-11-06 21:06:41,827 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 96 transitions. Word has length 41 [2023-11-06 21:06:41,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:06:41,828 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 96 transitions. [2023-11-06 21:06:41,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 4 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (11), 8 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-06 21:06:41,828 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 96 transitions. [2023-11-06 21:06:41,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-06 21:06:41,831 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:06:41,831 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:06:41,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa686b8a-ffda-436b-b057-67c641cb0b74/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 21:06:42,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa686b8a-ffda-436b-b057-67c641cb0b74/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:06:42,042 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:06:42,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:06:42,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1298731383, now seen corresponding path program 1 times [2023-11-06 21:06:42,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:06:42,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757260711] [2023-11-06 21:06:42,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:06:42,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:06:42,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:06:42,181 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 21:06:42,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:06:42,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757260711] [2023-11-06 21:06:42,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757260711] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:06:42,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924810946] [2023-11-06 21:06:42,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:06:42,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:06:42,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa686b8a-ffda-436b-b057-67c641cb0b74/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:06:42,184 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa686b8a-ffda-436b-b057-67c641cb0b74/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:06:42,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa686b8a-ffda-436b-b057-67c641cb0b74/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 21:06:42,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:06:42,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 21:06:42,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:06:42,307 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-06 21:06:42,307 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:06:42,437 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 21:06:42,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924810946] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:06:42,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [288448616] [2023-11-06 21:06:42,441 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-11-06 21:06:42,441 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 21:06:42,441 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 21:06:42,442 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 21:06:42,442 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 21:06:42,841 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 76 for LOIs [2023-11-06 21:06:42,921 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 11 for LOIs [2023-11-06 21:06:43,034 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 21:06:44,531 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2238#(and (= (select |#length| 3) 12) (<= 1 |#StackHeapBarrier|) (= 22 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (exists ((|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~one~0#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_mulflt_~b#1_36| Int) (|v_ULTIMATE.start_mulflt_~a#1_28| Int)) (and (= |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_7| |v_ULTIMATE.start_mulflt_~a#1_28|) (= |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_3| |v_ULTIMATE.start_mulflt_~b#1_36|) (= (mod |v_ULTIMATE.start_main_~one~0#1_BEFORE_CALL_7| 4294967296) (mod |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_3| 4294967296)) (<= 1 (mod |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_7| 4294967296)) (= (mod |v_ULTIMATE.start_mulflt_~b#1_36| 4294967296) 0))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0))' at error location [2023-11-06 21:06:44,532 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 21:06:44,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:06:44,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-11-06 21:06:44,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711236908] [2023-11-06 21:06:44,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:06:44,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 21:06:44,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:06:44,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 21:06:44,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2023-11-06 21:06:44,535 INFO L87 Difference]: Start difference. First operand 72 states and 96 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 14 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-06 21:06:44,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:06:44,951 INFO L93 Difference]: Finished difference Result 185 states and 284 transitions. [2023-11-06 21:06:44,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 21:06:44,952 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 14 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 45 [2023-11-06 21:06:44,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:06:44,955 INFO L225 Difference]: With dead ends: 185 [2023-11-06 21:06:44,955 INFO L226 Difference]: Without dead ends: 142 [2023-11-06 21:06:44,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=237, Invalid=1023, Unknown=0, NotChecked=0, Total=1260 [2023-11-06 21:06:44,958 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 65 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:06:44,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 164 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:06:44,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-11-06 21:06:44,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 80. [2023-11-06 21:06:44,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 66 states have (on average 1.303030303030303) internal successors, (86), 67 states have internal predecessors, (86), 8 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2023-11-06 21:06:44,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 105 transitions. [2023-11-06 21:06:44,990 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 105 transitions. Word has length 45 [2023-11-06 21:06:44,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:06:44,991 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 105 transitions. [2023-11-06 21:06:44,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 14 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-06 21:06:44,991 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 105 transitions. [2023-11-06 21:06:44,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-06 21:06:44,994 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:06:44,994 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:06:45,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa686b8a-ffda-436b-b057-67c641cb0b74/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 21:06:45,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa686b8a-ffda-436b-b057-67c641cb0b74/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:06:45,201 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:06:45,201 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:06:45,201 INFO L85 PathProgramCache]: Analyzing trace with hash -428119903, now seen corresponding path program 1 times [2023-11-06 21:06:45,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:06:45,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712759808] [2023-11-06 21:06:45,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:06:45,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:06:45,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:06:45,513 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 21:06:45,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:06:45,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712759808] [2023-11-06 21:06:45,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712759808] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:06:45,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130014560] [2023-11-06 21:06:45,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:06:45,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:06:45,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa686b8a-ffda-436b-b057-67c641cb0b74/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:06:45,515 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa686b8a-ffda-436b-b057-67c641cb0b74/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:06:45,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa686b8a-ffda-436b-b057-67c641cb0b74/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 21:06:45,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:06:45,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 21:06:45,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:06:45,706 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-06 21:06:45,706 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:06:45,941 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-06 21:06:45,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130014560] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:06:45,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [842559645] [2023-11-06 21:06:45,944 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-11-06 21:06:45,944 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 21:06:45,944 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 21:06:45,944 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 21:06:45,944 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 21:06:46,349 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 33 for LOIs [2023-11-06 21:06:46,362 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 11 for LOIs [2023-11-06 21:06:46,495 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 21:06:47,513 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2925#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_10| Int)) (<= (mod |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_10| 4294967296) 4294967294)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_ULTIMATE.start_main_~one~0#1_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_4| Int)) (= (mod |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_4| 4294967296) (mod |v_ULTIMATE.start_main_~one~0#1_BEFORE_CALL_8| 4294967296))))' at error location [2023-11-06 21:06:47,513 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 21:06:47,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:06:47,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 8] total 19 [2023-11-06 21:06:47,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408765538] [2023-11-06 21:06:47,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:06:47,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 21:06:47,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:06:47,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 21:06:47,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1140, Unknown=0, NotChecked=0, Total=1260 [2023-11-06 21:06:47,516 INFO L87 Difference]: Start difference. First operand 80 states and 105 transitions. Second operand has 19 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 4 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-06 21:06:48,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:06:48,248 INFO L93 Difference]: Finished difference Result 152 states and 218 transitions. [2023-11-06 21:06:48,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-06 21:06:48,249 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 4 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) Word has length 45 [2023-11-06 21:06:48,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:06:48,250 INFO L225 Difference]: With dead ends: 152 [2023-11-06 21:06:48,251 INFO L226 Difference]: Without dead ends: 106 [2023-11-06 21:06:48,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=234, Invalid=2118, Unknown=0, NotChecked=0, Total=2352 [2023-11-06 21:06:48,255 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 55 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 21:06:48,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 365 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 21:06:48,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-11-06 21:06:48,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 76. [2023-11-06 21:06:48,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 63 states have (on average 1.2857142857142858) internal successors, (81), 64 states have internal predecessors, (81), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2023-11-06 21:06:48,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 96 transitions. [2023-11-06 21:06:48,288 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 96 transitions. Word has length 45 [2023-11-06 21:06:48,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:06:48,288 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 96 transitions. [2023-11-06 21:06:48,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 4 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-06 21:06:48,289 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 96 transitions. [2023-11-06 21:06:48,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-06 21:06:48,297 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:06:48,297 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:06:48,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa686b8a-ffda-436b-b057-67c641cb0b74/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0