./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 cf1a7837 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_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/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_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX --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 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:12:29,722 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:12:29,857 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:12:29,865 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:12:29,866 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:12:29,905 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:12:29,906 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:12:29,907 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:12:29,908 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:12:29,913 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:12:29,913 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:12:29,914 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:12:29,915 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:12:29,917 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:12:29,917 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:12:29,917 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:12:29,918 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:12:29,918 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:12:29,919 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:12:29,919 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:12:29,920 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:12:29,920 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:12:29,921 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:12:29,922 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:12:29,922 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:12:29,923 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:12:29,923 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:12:29,924 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:12:29,924 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:12:29,925 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:12:29,926 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:12:29,926 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:12:29,926 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:12:29,927 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:12:29,927 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:12:29,927 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:12:29,928 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:12:29,928 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:12:29,928 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:12:29,929 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:12:29,929 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:12:29,929 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:12:29,929 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:12:29,930 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:12:29,930 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:12:29,931 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_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 [2023-11-12 00:12:30,268 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:12:30,302 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:12:30,307 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:12:30,309 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:12:30,309 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:12:30,312 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2023-11-12 00:12:33,311 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:12:33,509 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:12:33,510 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2023-11-12 00:12:33,519 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/data/ff8388cbd/2da6aa6dc9024f3eaa8006274cfefa5d/FLAG0b4ad450d [2023-11-12 00:12:33,535 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/data/ff8388cbd/2da6aa6dc9024f3eaa8006274cfefa5d [2023-11-12 00:12:33,538 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:12:33,540 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:12:33,542 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:12:33,542 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:12:33,548 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:12:33,549 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:12:33" (1/1) ... [2023-11-12 00:12:33,550 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@411c678c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:33, skipping insertion in model container [2023-11-12 00:12:33,551 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:12:33" (1/1) ... [2023-11-12 00:12:33,584 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:12:33,769 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_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c[728,741] [2023-11-12 00:12:33,828 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:12:33,844 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:12:33,860 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_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c[728,741] [2023-11-12 00:12:33,912 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:12:33,928 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:12:33,928 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:33 WrapperNode [2023-11-12 00:12:33,929 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:12:33,930 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:12:33,930 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:12:33,930 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:12:33,938 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:33" (1/1) ... [2023-11-12 00:12:33,950 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:33" (1/1) ... [2023-11-12 00:12:33,982 INFO L138 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 146 [2023-11-12 00:12:33,983 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:12:33,984 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:12:33,984 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:12:33,984 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:12:33,994 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:33" (1/1) ... [2023-11-12 00:12:33,994 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:33" (1/1) ... [2023-11-12 00:12:33,997 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:33" (1/1) ... [2023-11-12 00:12:33,997 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:33" (1/1) ... [2023-11-12 00:12:34,004 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:33" (1/1) ... [2023-11-12 00:12:34,009 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:33" (1/1) ... [2023-11-12 00:12:34,011 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:33" (1/1) ... [2023-11-12 00:12:34,013 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:33" (1/1) ... [2023-11-12 00:12:34,018 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:12:34,019 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:12:34,019 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:12:34,019 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:12:34,020 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:33" (1/1) ... [2023-11-12 00:12:34,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:12:34,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:12:34,058 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:12:34,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:12:34,099 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:12:34,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:12:34,100 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-11-12 00:12:34,100 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-11-12 00:12:34,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:12:34,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:12:34,102 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-12 00:12:34,102 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-12 00:12:34,174 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:12:34,176 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:12:34,579 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:12:34,799 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:12:34,799 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 00:12:34,802 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:12:34 BoogieIcfgContainer [2023-11-12 00:12:34,803 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:12:34,806 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:12:34,806 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:12:34,810 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:12:34,810 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:12:33" (1/3) ... [2023-11-12 00:12:34,811 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@780c4077 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:12:34, skipping insertion in model container [2023-11-12 00:12:34,811 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:33" (2/3) ... [2023-11-12 00:12:34,812 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@780c4077 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:12:34, skipping insertion in model container [2023-11-12 00:12:34,812 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:12:34" (3/3) ... [2023-11-12 00:12:34,814 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_3a.c.cil.c [2023-11-12 00:12:34,835 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:12:34,835 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:12:34,891 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:12:34,924 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;@683e84f3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:12:34,925 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:12:34,929 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) [2023-11-12 00:12:34,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-12 00:12:34,940 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:12:34,941 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] [2023-11-12 00:12:34,941 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:12:34,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:12:34,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1922523142, now seen corresponding path program 1 times [2023-11-12 00:12:34,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:12:34,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672560138] [2023-11-12 00:12:34,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:34,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:12:35,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:12:35,438 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-12 00:12:35,439 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:12:35,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672560138] [2023-11-12 00:12:35,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672560138] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:12:35,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962418754] [2023-11-12 00:12:35,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:35,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:12:35,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:12:35,447 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:12:35,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:12:35,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:12:35,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-12 00:12:35,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:12:35,831 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:12:35,831 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:12:36,257 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-12 00:12:36,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962418754] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:12:36,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [696164249] [2023-11-12 00:12:36,284 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-11-12 00:12:36,284 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:12:36,288 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:12:36,293 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:12:36,294 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:12:36,600 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 43 for LOIs [2023-11-12 00:12:36,734 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:12:37,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [696164249] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:12:37,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:12:37,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4, 13, 11] total 30 [2023-11-12 00:12:37,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314769837] [2023-11-12 00:12:37,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:12:37,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 00:12:37,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:12:37,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 00:12:37,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2023-11-12 00:12:37,766 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) [2023-11-12 00:12:38,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:12:38,077 INFO L93 Difference]: Finished difference Result 107 states and 170 transitions. [2023-11-12 00:12:38,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 00:12:38,080 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 [2023-11-12 00:12:38,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:12:38,090 INFO L225 Difference]: With dead ends: 107 [2023-11-12 00:12:38,090 INFO L226 Difference]: Without dead ends: 65 [2023-11-12 00:12:38,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2023-11-12 00:12:38,098 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 69 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:12:38,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 136 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:12:38,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-12 00:12:38,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 48. [2023-11-12 00:12:38,146 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) [2023-11-12 00:12:38,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2023-11-12 00:12:38,149 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 32 [2023-11-12 00:12:38,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:12:38,150 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2023-11-12 00:12:38,150 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) [2023-11-12 00:12:38,150 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2023-11-12 00:12:38,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-12 00:12:38,153 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:12:38,153 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] [2023-11-12 00:12:38,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:12:38,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 00:12:38,360 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:12:38,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:12:38,360 INFO L85 PathProgramCache]: Analyzing trace with hash -663923659, now seen corresponding path program 1 times [2023-11-12 00:12:38,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:12:38,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11586645] [2023-11-12 00:12:38,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:38,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:12:38,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:12:39,020 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-12 00:12:39,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:12:39,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11586645] [2023-11-12 00:12:39,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11586645] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:12:39,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740325024] [2023-11-12 00:12:39,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:39,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:12:39,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:12:39,025 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:12:39,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:12:39,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:12:39,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-12 00:12:39,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:12:39,221 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:12:39,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:12:39,489 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-12 00:12:39,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740325024] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:12:39,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [403711868] [2023-11-12 00:12:39,492 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-11-12 00:12:39,492 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:12:39,493 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:12:39,493 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:12:39,493 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:12:40,087 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 76 for LOIs [2023-11-12 00:12:40,186 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 11 for LOIs [2023-11-12 00:12:40,269 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:12:42,351 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '686#(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 [2023-11-12 00:12:42,352 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:12:42,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:12:42,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 21 [2023-11-12 00:12:42,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121273753] [2023-11-12 00:12:42,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:12:42,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-12 00:12:42,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:12:42,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-12 00:12:42,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1220, Unknown=0, NotChecked=0, Total=1332 [2023-11-12 00:12:42,356 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) [2023-11-12 00:12:42,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:12:42,971 INFO L93 Difference]: Finished difference Result 130 states and 179 transitions. [2023-11-12 00:12:42,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-12 00:12:42,971 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 [2023-11-12 00:12:42,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:12:42,976 INFO L225 Difference]: With dead ends: 130 [2023-11-12 00:12:42,978 INFO L226 Difference]: Without dead ends: 79 [2023-11-12 00:12:42,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=170, Invalid=1810, Unknown=0, NotChecked=0, Total=1980 [2023-11-12 00:12:42,983 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 33 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:12:42,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 497 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:12:42,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-11-12 00:12:43,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2023-11-12 00:12:43,006 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) [2023-11-12 00:12:43,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 77 transitions. [2023-11-12 00:12:43,009 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 77 transitions. Word has length 37 [2023-11-12 00:12:43,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:12:43,010 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 77 transitions. [2023-11-12 00:12:43,010 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) [2023-11-12 00:12:43,011 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 77 transitions. [2023-11-12 00:12:43,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-12 00:12:43,014 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:12:43,014 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] [2023-11-12 00:12:43,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:12:43,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-12 00:12:43,221 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:12:43,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:12:43,221 INFO L85 PathProgramCache]: Analyzing trace with hash -947793246, now seen corresponding path program 1 times [2023-11-12 00:12:43,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:12:43,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368479214] [2023-11-12 00:12:43,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:43,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:12:43,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:12:43,501 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-12 00:12:43,502 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:12:43,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368479214] [2023-11-12 00:12:43,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368479214] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:12:43,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:12:43,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-12 00:12:43,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180337357] [2023-11-12 00:12:43,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:12:43,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 00:12:43,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:12:43,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 00:12:43,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:12:43,505 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) [2023-11-12 00:12:43,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:12:43,666 INFO L93 Difference]: Finished difference Result 82 states and 107 transitions. [2023-11-12 00:12:43,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:12:43,669 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 [2023-11-12 00:12:43,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:12:43,671 INFO L225 Difference]: With dead ends: 82 [2023-11-12 00:12:43,671 INFO L226 Difference]: Without dead ends: 67 [2023-11-12 00:12:43,671 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 [2023-11-12 00:12:43,673 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 16 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:12:43,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 306 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:12:43,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-12 00:12:43,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 58. [2023-11-12 00:12:43,694 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) [2023-11-12 00:12:43,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2023-11-12 00:12:43,696 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 76 transitions. Word has length 38 [2023-11-12 00:12:43,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:12:43,697 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 76 transitions. [2023-11-12 00:12:43,697 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) [2023-11-12 00:12:43,697 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 76 transitions. [2023-11-12 00:12:43,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-12 00:12:43,699 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:12:43,699 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] [2023-11-12 00:12:43,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:12:43,700 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:12:43,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:12:43,701 INFO L85 PathProgramCache]: Analyzing trace with hash 225071812, now seen corresponding path program 1 times [2023-11-12 00:12:43,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:12:43,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060565956] [2023-11-12 00:12:43,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:43,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:12:43,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:12:43,976 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-12 00:12:43,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:12:43,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060565956] [2023-11-12 00:12:43,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060565956] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:12:43,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243669692] [2023-11-12 00:12:43,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:43,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:12:43,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:12:43,980 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:12:43,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:12:44,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:12:44,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-12 00:12:44,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:12:44,763 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-12 00:12:44,763 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:12:45,783 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:12:45,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243669692] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:12:45,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [873509448] [2023-11-12 00:12:45,787 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-11-12 00:12:45,787 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:12:45,788 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:12:45,788 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:12:45,788 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:12:46,257 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 76 for LOIs [2023-11-12 00:12:46,340 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 11 for LOIs [2023-11-12 00:12:46,423 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:12:48,757 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1402#(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 [2023-11-12 00:12:48,757 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:12:48,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:12:48,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 15, 13] total 29 [2023-11-12 00:12:48,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815947348] [2023-11-12 00:12:48,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:12:48,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-12 00:12:48,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:12:48,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-12 00:12:48,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1896, Unknown=0, NotChecked=0, Total=2070 [2023-11-12 00:12:48,761 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) [2023-11-12 00:12:53,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:12:53,593 INFO L93 Difference]: Finished difference Result 213 states and 353 transitions. [2023-11-12 00:12:53,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-12 00:12:53,594 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 [2023-11-12 00:12:53,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:12:53,598 INFO L225 Difference]: With dead ends: 213 [2023-11-12 00:12:53,598 INFO L226 Difference]: Without dead ends: 159 [2023-11-12 00:12:53,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1968 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=730, Invalid=6580, Unknown=0, NotChecked=0, Total=7310 [2023-11-12 00:12:53,604 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 165 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 1148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:12:53,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 703 Invalid, 1148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1120 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-12 00:12:53,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-11-12 00:12:53,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 72. [2023-11-12 00:12:53,646 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) [2023-11-12 00:12:53,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 96 transitions. [2023-11-12 00:12:53,647 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 96 transitions. Word has length 41 [2023-11-12 00:12:53,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:12:53,648 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 96 transitions. [2023-11-12 00:12:53,648 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) [2023-11-12 00:12:53,648 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 96 transitions. [2023-11-12 00:12:53,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-12 00:12:53,651 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:12:53,651 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] [2023-11-12 00:12:53,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:12:53,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-12 00:12:53,858 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:12:53,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:12:53,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1298731383, now seen corresponding path program 1 times [2023-11-12 00:12:53,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:12:53,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272462933] [2023-11-12 00:12:53,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:53,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:12:53,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:12:53,983 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-12 00:12:53,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:12:53,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272462933] [2023-11-12 00:12:53,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272462933] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:12:53,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775466888] [2023-11-12 00:12:53,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:53,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:12:53,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:12:53,986 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:12:54,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:12:54,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:12:54,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 00:12:54,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:12:54,138 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 00:12:54,138 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:12:54,252 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-12 00:12:54,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775466888] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:12:54,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [275515892] [2023-11-12 00:12:54,258 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-11-12 00:12:54,259 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:12:54,260 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:12:54,260 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:12:54,260 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:12:54,755 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 76 for LOIs [2023-11-12 00:12:54,858 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 11 for LOIs [2023-11-12 00:12:54,993 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:12:56,446 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2120#(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 [2023-11-12 00:12:56,446 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:12:56,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:12:56,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-11-12 00:12:56,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296870440] [2023-11-12 00:12:56,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:12:56,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-12 00:12:56,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:12:56,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-12 00:12:56,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2023-11-12 00:12:56,449 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) [2023-11-12 00:12:56,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:12:56,741 INFO L93 Difference]: Finished difference Result 185 states and 284 transitions. [2023-11-12 00:12:56,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 00:12:56,742 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 [2023-11-12 00:12:56,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:12:56,744 INFO L225 Difference]: With dead ends: 185 [2023-11-12 00:12:56,744 INFO L226 Difference]: Without dead ends: 142 [2023-11-12 00:12:56,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=237, Invalid=1023, Unknown=0, NotChecked=0, Total=1260 [2023-11-12 00:12:56,747 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 62 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:12:56,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 141 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:12:56,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-11-12 00:12:56,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 80. [2023-11-12 00:12:56,773 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) [2023-11-12 00:12:56,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 105 transitions. [2023-11-12 00:12:56,774 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 105 transitions. Word has length 45 [2023-11-12 00:12:56,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:12:56,775 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 105 transitions. [2023-11-12 00:12:56,775 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) [2023-11-12 00:12:56,775 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 105 transitions. [2023-11-12 00:12:56,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-12 00:12:56,777 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:12:56,778 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] [2023-11-12 00:12:56,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:12:56,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:12:56,983 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:12:56,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:12:56,984 INFO L85 PathProgramCache]: Analyzing trace with hash -428119903, now seen corresponding path program 1 times [2023-11-12 00:12:56,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:12:56,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896444562] [2023-11-12 00:12:56,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:56,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:12:57,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:12:57,279 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-12 00:12:57,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:12:57,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896444562] [2023-11-12 00:12:57,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896444562] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:12:57,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659302335] [2023-11-12 00:12:57,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:57,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:12:57,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:12:57,282 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:12:57,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:12:57,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:12:57,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-12 00:12:57,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:12:57,470 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-12 00:12:57,470 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:12:57,708 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-12 00:12:57,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659302335] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:12:57,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [912583670] [2023-11-12 00:12:57,711 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-11-12 00:12:57,711 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:12:57,711 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:12:57,712 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:12:57,712 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:12:58,163 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 33 for LOIs [2023-11-12 00:12:58,178 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 11 for LOIs [2023-11-12 00:12:58,302 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:12:59,405 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2757#(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 [2023-11-12 00:12:59,405 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:12:59,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:12:59,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 8] total 19 [2023-11-12 00:12:59,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4553314] [2023-11-12 00:12:59,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:12:59,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-12 00:12:59,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:12:59,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-12 00:12:59,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1140, Unknown=0, NotChecked=0, Total=1260 [2023-11-12 00:12:59,409 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) [2023-11-12 00:13:00,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:13:00,154 INFO L93 Difference]: Finished difference Result 152 states and 218 transitions. [2023-11-12 00:13:00,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-12 00:13:00,155 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 [2023-11-12 00:13:00,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:13:00,157 INFO L225 Difference]: With dead ends: 152 [2023-11-12 00:13:00,157 INFO L226 Difference]: Without dead ends: 106 [2023-11-12 00:13:00,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=234, Invalid=2118, Unknown=0, NotChecked=0, Total=2352 [2023-11-12 00:13:00,160 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 66 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:13:00,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 278 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:13:00,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-11-12 00:13:00,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 76. [2023-11-12 00:13:00,194 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) [2023-11-12 00:13:00,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 96 transitions. [2023-11-12 00:13:00,195 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 96 transitions. Word has length 45 [2023-11-12 00:13:00,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:13:00,196 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 96 transitions. [2023-11-12 00:13:00,196 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) [2023-11-12 00:13:00,196 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 96 transitions. [2023-11-12 00:13:00,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-12 00:13:00,198 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:13:00,203 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] [2023-11-12 00:13:00,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 00:13:00,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:00,404 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:13:00,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:13:00,404 INFO L85 PathProgramCache]: Analyzing trace with hash -714982186, now seen corresponding path program 1 times [2023-11-12 00:13:00,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:13:00,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887791938] [2023-11-12 00:13:00,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:00,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:13:00,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:13:00,827 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-12 00:13:00,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:13:00,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887791938] [2023-11-12 00:13:00,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887791938] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:13:00,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723221953] [2023-11-12 00:13:00,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:00,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:00,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:13:00,832 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:13:00,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 00:13:01,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:13:01,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-12 00:13:01,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:13:01,425 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 21 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 00:13:01,425 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:13:01,948 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-12 00:13:01,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723221953] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:13:01,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [417758256] [2023-11-12 00:13:01,951 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-11-12 00:13:01,952 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:13:01,952 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:13:01,952 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:13:01,952 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:13:02,402 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 76 for LOIs [2023-11-12 00:13:02,470 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 11 for LOIs [2023-11-12 00:13:02,595 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:13:04,429 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3398#(and (= (select |#length| 3) 12) (<= 1 |#StackHeapBarrier|) (= 22 (select |#length| 2)) (exists ((|v_ULTIMATE.start_mulflt_~b#1_41| Int) (|v_ULTIMATE.start_mulflt_~a#1_33| Int) (|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~one~0#1_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_11| Int)) (and (= (mod |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_5| 4294967296) (mod |v_ULTIMATE.start_main_~one~0#1_BEFORE_CALL_9| 4294967296)) (= |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_11| |v_ULTIMATE.start_mulflt_~a#1_33|) (= (mod |v_ULTIMATE.start_mulflt_~b#1_41| 4294967296) 0) (<= 1 (mod |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_11| 4294967296)) (= |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_5| |v_ULTIMATE.start_mulflt_~b#1_41|))) (= 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) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0))' at error location [2023-11-12 00:13:04,429 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:13:04,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:13:04,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-11-12 00:13:04,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655547404] [2023-11-12 00:13:04,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:13:04,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-12 00:13:04,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:13:04,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-12 00:13:04,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1169, Unknown=0, NotChecked=0, Total=1406 [2023-11-12 00:13:04,433 INFO L87 Difference]: Start difference. First operand 76 states and 96 transitions. Second operand has 22 states, 22 states have (on average 3.5) internal successors, (77), 22 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 00:13:13,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:13:13,132 INFO L93 Difference]: Finished difference Result 200 states and 263 transitions. [2023-11-12 00:13:13,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-12 00:13:13,133 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5) internal successors, (77), 22 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 50 [2023-11-12 00:13:13,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:13:13,135 INFO L225 Difference]: With dead ends: 200 [2023-11-12 00:13:13,135 INFO L226 Difference]: Without dead ends: 152 [2023-11-12 00:13:13,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=423, Invalid=1737, Unknown=2, NotChecked=0, Total=2162 [2023-11-12 00:13:13,137 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 182 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:13:13,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 209 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 00:13:13,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-11-12 00:13:13,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 79. [2023-11-12 00:13:13,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 69 states have internal predecessors, (87), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-12 00:13:13,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 97 transitions. [2023-11-12 00:13:13,156 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 97 transitions. Word has length 50 [2023-11-12 00:13:13,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:13:13,156 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 97 transitions. [2023-11-12 00:13:13,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5) internal successors, (77), 22 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 00:13:13,157 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 97 transitions. [2023-11-12 00:13:13,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-12 00:13:13,159 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:13:13,159 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 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] [2023-11-12 00:13:13,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 00:13:13,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-12 00:13:13,365 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:13:13,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:13:13,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1542910967, now seen corresponding path program 2 times [2023-11-12 00:13:13,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:13:13,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705453606] [2023-11-12 00:13:13,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:13,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:13:13,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:13:13,572 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 3 proven. 64 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-12 00:13:13,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:13:13,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705453606] [2023-11-12 00:13:13,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705453606] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:13:13,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716888823] [2023-11-12 00:13:13,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:13:13,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:13,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:13:13,576 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:13:13,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 00:13:13,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-11-12 00:13:13,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:13:13,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 00:13:13,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:13:13,969 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 20 proven. 57 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 00:13:13,970 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:13:14,270 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 3 proven. 64 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-12 00:13:14,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716888823] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:13:14,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [687230059] [2023-11-12 00:13:14,274 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-11-12 00:13:14,274 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:13:14,274 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:13:14,274 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:13:14,275 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:13:14,608 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 76 for LOIs [2023-11-12 00:13:14,658 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 11 for LOIs [2023-11-12 00:13:14,780 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:13:16,225 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4139#(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_main_~b~0#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_12| Int) (|v_ULTIMATE.start_mulflt_~a#1_36| Int) (|v_ULTIMATE.start_main_~one~0#1_BEFORE_CALL_10| Int) (|v_ULTIMATE.start_mulflt_~b#1_44| Int)) (and (= (mod |v_ULTIMATE.start_main_~one~0#1_BEFORE_CALL_10| 4294967296) (mod |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_6| 4294967296)) (<= 1 (mod |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_12| 4294967296)) (= (mod |v_ULTIMATE.start_mulflt_~b#1_44| 4294967296) 0) (= |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_6| |v_ULTIMATE.start_mulflt_~b#1_44|) (= |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_12| |v_ULTIMATE.start_mulflt_~a#1_36|))) (= (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 [2023-11-12 00:13:16,225 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:13:16,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:13:16,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2023-11-12 00:13:16,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300189275] [2023-11-12 00:13:16,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:13:16,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-12 00:13:16,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:13:16,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-12 00:13:16,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1427, Unknown=0, NotChecked=0, Total=1806 [2023-11-12 00:13:16,229 INFO L87 Difference]: Start difference. First operand 79 states and 97 transitions. Second operand has 26 states, 26 states have (on average 3.8076923076923075) internal successors, (99), 26 states have internal predecessors, (99), 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) [2023-11-12 00:13:16,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:13:16,736 INFO L93 Difference]: Finished difference Result 253 states and 337 transitions. [2023-11-12 00:13:16,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-12 00:13:16,737 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.8076923076923075) internal successors, (99), 26 states have internal predecessors, (99), 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 57 [2023-11-12 00:13:16,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:13:16,739 INFO L225 Difference]: With dead ends: 253 [2023-11-12 00:13:16,739 INFO L226 Difference]: Without dead ends: 214 [2023-11-12 00:13:16,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1109 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=609, Invalid=2043, Unknown=0, NotChecked=0, Total=2652 [2023-11-12 00:13:16,741 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 175 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:13:16,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 209 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:13:16,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2023-11-12 00:13:16,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 93. [2023-11-12 00:13:16,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 83 states have (on average 1.2289156626506024) internal successors, (102), 83 states have internal predecessors, (102), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-12 00:13:16,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 112 transitions. [2023-11-12 00:13:16,770 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 112 transitions. Word has length 57 [2023-11-12 00:13:16,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:13:16,770 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 112 transitions. [2023-11-12 00:13:16,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.8076923076923075) internal successors, (99), 26 states have internal predecessors, (99), 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) [2023-11-12 00:13:16,771 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 112 transitions. [2023-11-12 00:13:16,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-12 00:13:16,772 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:13:16,772 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 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] [2023-11-12 00:13:16,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 00:13:16,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-12 00:13:16,979 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:13:16,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:13:16,980 INFO L85 PathProgramCache]: Analyzing trace with hash -311963498, now seen corresponding path program 2 times [2023-11-12 00:13:16,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:13:16,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519296361] [2023-11-12 00:13:16,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:16,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:13:17,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:13:17,705 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 3 proven. 143 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-12 00:13:17,705 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:13:17,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519296361] [2023-11-12 00:13:17,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519296361] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:13:17,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605757948] [2023-11-12 00:13:17,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:13:17,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:17,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:13:17,708 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:13:17,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0a24d26-35dc-4a8d-867f-1ed30daf4db6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 00:13:18,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2023-11-12 00:13:18,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:13:18,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-12 00:13:18,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:13:19,572 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 2 proven. 152 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-12 00:13:19,573 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:13:21,578 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 7 proven. 143 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:13:21,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605757948] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:13:21,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1006370419] [2023-11-12 00:13:21,581 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-11-12 00:13:21,582 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:13:21,582 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:13:21,582 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:13:21,583 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:13:21,906 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 76 for LOIs [2023-11-12 00:13:21,989 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 11 for LOIs [2023-11-12 00:13:22,100 INFO L180 IcfgInterpreter]: Interpretation finished